/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&family=Noto+Sans+Sinhala:wght@300;400;500;600;700&display=swap');

/* CSS Variables for Light Theme */
:root {
    --primary-orange: #FF8C00;
    --primary-dark: #E67300;
    --primary-light: #FFA533;
    --accent-yellow: #FFD700;
    
    /* Light Theme Colors */
    --background-primary: #ffffff;
    --background-secondary: #f5f5f5;
    --background-tertiary: #fafafa;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #666666;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-border: rgba(255, 140, 0, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-orange: rgba(255, 140, 0, 0.3);
    --header-bg: rgba(255, 255, 255, 0.95);
    --footer-bg: #f8f8f8;
    --input-bg: #ffffff;
    --input-border: #e0e0e0;
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --background-primary: #1a1a1a;
    --background-secondary: #2d2d2d;
    --background-tertiary: #242424;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #cccccc;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 140, 0, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --shadow-orange: rgba(255, 140, 0, 0.3);
    --header-bg: rgba(26, 26, 26, 0.95);
    --footer-bg: rgba(26, 26, 26, 0.95);
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', 'Noto Sans Sinhala', sans-serif;
    background: linear-gradient(135deg, var(--background-primary) 0%, var(--background-secondary) 100%);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

.app {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Floating Balls */
.floating-balls {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.floating-balls-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    opacity: 0.15;
}

.ball {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--primary-light), var(--primary-orange));
    opacity: 0.15;
    animation: float-up linear infinite;
    box-shadow: 0 0 30px var(--shadow-orange);
}

@keyframes float-up {
    0% {
        transform: translateY(100vh) translateX(0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.15;
    }
    90% {
        opacity: 0.15;
    }
    100% {
        transform: translateY(-100vh) translateX(50px) rotate(360deg);
        opacity: 0;
    }
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--card-border);
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all 0.3s ease;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-container {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-orange);
    box-shadow: 0 4px 15px var(--shadow-orange);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.logo-container:hover {
    transform: scale(1.05) rotate(5deg);
}

.logo-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-orange), var(--accent-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    white-space: nowrap;
}

.mc-logo {
    width: 20px;
    height: 20px;
    object-fit: contain;
}


.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ── Header Search Bar ── */
.header-search {
    position: relative;
    flex: 1;
    max-width: 320px;
    min-width: 180px;
}

.search-form {
    width: 100%;
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 50px;
    padding: 0.45rem 1rem;
    gap: 0.5rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.search-input-wrapper:focus-within {
    border-color: var(--primary-orange);
    box-shadow: 0 0 0 3px var(--shadow-orange);
}

.search-icon {
    font-size: 0.95rem;
    opacity: 0.7;
    flex-shrink: 0;
}

.search-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    width: 100%;
    font-family: inherit;
}

.search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.search-clear-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 0;
    flex-shrink: 0;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.search-clear-btn:hover {
    opacity: 1;
}

.search-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-color);
    z-index: 2000;
    overflow: hidden;
    max-height: 320px;
    overflow-y: auto;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.2s ease;
    border-bottom: 1px solid var(--card-border);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--shadow-orange);
}

.search-result-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.search-result-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.search-result-arrow {
    color: var(--primary-orange);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.search-no-results {
    padding: 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.88rem;
}
/* ─────────────────────── */

.subject-highlighted {
    animation: subjectHighlight 2.5s ease forwards;
    outline: 3px solid var(--primary-orange);
    outline-offset: 3px;
    border-radius: 16px;
}

@keyframes subjectHighlight {
    0%   { box-shadow: 0 0 0 0 var(--shadow-orange), 0 0 30px var(--shadow-orange); }
    30%  { box-shadow: 0 0 0 8px var(--shadow-orange), 0 0 40px var(--shadow-orange); }
    100% { box-shadow: 0 0 0 0 transparent; }
}

.theme-toggle-btn {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.theme-toggle-btn:hover {
    transform: translateY(-2px);
    border-color: var(--primary-orange);
    box-shadow: 0 4px 12px var(--shadow-orange);
}

.admin-icon-btn {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow-color);
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-icon-btn:hover {
    transform: translateY(-2px) scale(1.05);
    border-color: var(--primary-orange);
    box-shadow: 0 4px 12px var(--shadow-orange);
}

.user-profile-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.user-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    border: 2px solid var(--primary-orange);
}

.user-name {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mobile-menu-btn {
    display: none;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.6rem 1rem;
    font-size: 1.5rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
    border-color: var(--primary-orange);
    transform: scale(1.05);
}

.nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-link {
    padding: 0.75rem 1.5rem;
    background: none;
    border: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-orange), transparent);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
    z-index: -1;
}

.nav-link:hover::before {
    width: 200%;
    height: 200%;
}

.nav-link:hover {
    color: var(--text-primary);
    border-color: var(--primary-orange);
    transform: translateY(-2px);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border-color: var(--primary-orange);
    box-shadow: 0 4px 15px var(--shadow-orange);
}

/* Main Content */
.main-content {
    flex: 1;
    position: relative;
    z-index: 1;
    padding-top: 2rem;
}

.page {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: 3rem 2rem;
    margin-bottom: 3rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeInUp 0.8s ease;
}

.title-line {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
    animation: fadeIn 1s ease 0.2s both;
}

.title-main {
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-orange), var(--accent-yellow), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeIn 1s ease 0.4s both, glow 2s ease-in-out infinite;
    line-height: 1.2;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes glow {
    0%, 100% { filter: drop-shadow(0 0 20px var(--shadow-orange)); }
    50% { filter: drop-shadow(0 0 40px var(--shadow-orange)); }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    animation: fadeIn 1s ease 0.6s both;
    font-weight: 300;
}

.hero-login-btn {
    margin-top: 2rem;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--shadow-orange);
    animation: fadeIn 1s ease 0.8s both;
}

.hero-login-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 25px var(--shadow-orange);
}

/* Call-to-action button on hero */
.cta-button {
    margin-top: 2rem;
    padding: 0.95rem 2.2rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 999px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
    box-shadow: 0 8px 30px rgba(230,115,0,0.18);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
}

.cta-button:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(230,115,0,0.24);
}

.cta-button:active {
    transform: translateY(-2px) scale(0.99);
}

.cta-button::after {
    content: '→';
    margin-left: 0.4rem;
    opacity: 0.9;
    transition: transform 0.25s ease;
}

/* Subjects Section */
.subjects-section {
    margin-top: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--accent-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.subject-card {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    animation: slideInUp 0.6s ease both;
    backdrop-filter: blur(10px);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subject-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--primary-orange) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.subject-card:hover::before {
    opacity: 0.15;
}

.subject-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--primary-orange);
    box-shadow: 0 20px 40px var(--shadow-orange);
}

.subject-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 2s ease-in-out infinite;
}

.subject-icon-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 1rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.subject-card:hover .subject-icon,
.subject-card:hover .subject-icon-img {
    animation: spin 0.6s ease;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.subject-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.download-btn {
    width: 100%;
    padding: 0.9rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-orange);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-orange);
}

/* Login Page */
.login-page {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.login-box {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 25px;
    padding: 3rem;
    backdrop-filter: blur(15px);
    box-shadow: 0 20px 60px var(--shadow-color);
    animation: slideInUp 0.6s ease;
}

.login-header {
    text-align: center;
    margin-bottom: 3rem;
}

.login-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-orange), var(--accent-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.login-methods {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.google-login-section,
.admin-login-section {
    text-align: center;
}

.google-login-section h3,
.admin-login-section h3 {
    color: var(--primary-orange);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.google-login-section p,
.admin-login-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.google-button-wrapper {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

.divider {
    text-align: center;
    position: relative;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--card-border);
}

.divider::before {
    left: 0;
}

.divider::after {
    right: 0;
}

.divider span {
    background: var(--card-bg);
    padding: 0 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.admin-login-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.error-message {
    background: #ff4444;
    color: white;
    padding: 0.8rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.admin-login-btn {
    padding: 1rem;
    background: linear-gradient(135deg, #FF8C00, #E67300);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-orange);
    margin-top: 0.5rem;
}

.admin-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-orange);
}

.login-footer {
    margin-top: 2rem;
    text-align: center;
}

.back-btn {
    background: none;
    border: 2px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.7rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.back-btn:hover {
    border-color: var(--primary-orange);
    color: var(--primary-orange);
    transform: translateY(-2px);
}

/* Notes Page */
.notes-page {
    min-height: 60vh;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-orange), var(--accent-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.page-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 1.5rem;
}

.login-prompt-btn {
    padding: 0.9rem 2rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-orange);
}

.login-prompt-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 20px var(--shadow-orange);
}

.no-notes {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* Admin Panel */
.admin-page {
    min-height: 70vh;
}

.admin-content {
    max-width: 1400px;
    margin: 0 auto;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.logout-btn-main {
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, #f44336, #da190b);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(244, 67, 54, 0.4);
}

.logout-btn-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(244, 67, 54, 0.6);
}

/* Analytics Section */
.analytics-section {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    backdrop-filter: blur(10px);
    animation: slideInUp 0.6s ease;
}

.analytics-section h2 {
    color: var(--primary-orange);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.analytics-card {
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 15px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.analytics-card:hover {
    border-color: var(--primary-orange);
    box-shadow: 0 6px 20px var(--shadow-orange);
    transform: translateY(-5px);
}

.analytics-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.analytics-info h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.analytics-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-orange);
    margin-bottom: 0.2rem;
}

.analytics-info small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Admin Container */
.admin-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.admin-form-section,
.admin-list-section {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    animation: slideInUp 0.6s ease both;
}

.admin-form-section h2,
.admin-list-section h2 {
    color: var(--primary-orange);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-orange);
    box-shadow: 0 0 15px var(--shadow-orange);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.icon-type-selector {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--card-border);
    border-radius: 12px;
    transition: all 0.3s ease;
    background: var(--input-bg);
}

.radio-label:hover {
    border-color: var(--primary-orange);
    background: rgba(255, 140, 0, 0.05);
}

.radio-label input[type="radio"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.radio-label input[type="radio"]:checked + span {
    color: var(--primary-orange);
    font-weight: 600;
}

.file-input {
    cursor: pointer;
    padding: 0.75rem !important;
}

.image-preview {
    margin-top: 1rem;
    text-align: center;
}

.image-preview img {
    max-width: 150px;
    max-height: 150px;
    border-radius: 12px;
    border: 2px solid var(--card-border);
    padding: 0.5rem;
    background: var(--background-primary);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.submit-btn {
    flex: 1;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-orange);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--shadow-orange);
}

.cancel-btn {
    flex: 1;
    padding: 1rem 2rem;
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cancel-btn:hover {
    border-color: var(--primary-orange);
    transform: translateY(-2px);
}

.admin-subjects-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.admin-subjects-list::-webkit-scrollbar {
    width: 8px;
}

.admin-subjects-list::-webkit-scrollbar-track {
    background: var(--background-secondary);
    border-radius: 10px;
}

.admin-subjects-list::-webkit-scrollbar-thumb {
    background: var(--primary-orange);
    border-radius: 10px;
}

.admin-subject-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.admin-subject-item:hover {
    border-color: var(--primary-orange);
    box-shadow: 0 4px 12px var(--shadow-orange);
}

.subject-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.subject-icon-small {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.1), rgba(255, 165, 51, 0.1));
    border-radius: 10px;
    flex-shrink: 0;
}

.subject-icon-small[src] {
    object-fit: contain;
    padding: 5px;
}

.subject-details {
    flex: 1;
}

.subject-details h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.drive-link {
    color: var(--primary-orange);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.drive-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.subject-actions {
    display: flex;
    gap: 0.5rem;
}

.edit-btn,
.delete-btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.edit-btn {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
}

.edit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

.delete-btn {
    background: linear-gradient(135deg, #f44336, #da190b);
    color: white;
}

.delete-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.4);
}

.no-subjects {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.access-denied {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    max-width: 600px;
    margin: 4rem auto;
    backdrop-filter: blur(10px);
}

.access-denied h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.access-denied p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* About & Contact Pages */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    animation: slideInUp 0.6s ease both;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-orange);
    box-shadow: 0 15px 30px var(--shadow-orange);
}

.about-card h2 {
    color: var(--primary-orange);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-card ul {
    list-style: none;
    padding: 0;
}

.about-card ul li {
    color: var(--text-secondary);
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1.1rem;
    line-height: 1.6;
}

.about-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-orange);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Contact Page */
.contact-content {
    max-width: 1200px;
    margin: 0 auto;
}

.contact-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-form {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    animation: slideInUp 0.6s ease both;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    animation: slideInUp 0.6s ease 0.2s both;
}

.info-card {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateX(5px);
    border-color: var(--primary-orange);
    box-shadow: 0 10px 20px var(--shadow-orange);
}

.info-card h3 {
    color: var(--primary-orange);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.info-card p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Footer */
.footer {
    background: var(--footer-bg);
    border-top: 2px solid var(--card-border);
    margin-top: 4rem;
    position: relative;
    z-index: 10;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem 1rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.footer-description h3 {
    color: var(--primary-orange);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-description p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

.social-links h4 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.social-icons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.5rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-icon:hover {
    background: var(--social-color);
    border-color: var(--social-color);
    color: white;
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.footer-bottom {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
    margin-top: 2rem;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .admin-container {
        grid-template-columns: 1fr;
    }

    .analytics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .subjects-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
    }

    .logo-text {
        font-size: 1.4rem;
    }

    .logo-container {
        width: 50px;
        height: 50px;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--header-bg);
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
        border-bottom: 2px solid var(--card-border);
        backdrop-filter: blur(10px);
    }

    .nav-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .header-controls {
        order: -1;
        width: 100%;
        justify-content: space-between;
    }

    .header-search {
        order: 0;
        max-width: 100%;
        width: 100%;
        min-width: unset;
    }

    .user-name {
        display: none;
    }

    .title-main {
        font-size: 2.5rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .subjects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .subject-card {
        padding: 2rem;
    }

    .login-box {
        padding: 2rem;
    }

    .icon-type-selector {
        flex-direction: column;
        gap: 0.75rem;
    }

    .analytics-grid {
        grid-template-columns: 1fr;
    }

    .about-section {
        gap: 1.5rem;
    }

    .about-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .page {
        padding: 1rem;
    }

    .hero-section {
        padding: 2rem 1rem;
    }

    .title-main {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .subject-icon {
        font-size: 3rem;
    }

    .subject-name {
        font-size: 1.2rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .admin-subject-item {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .subject-actions {
        width: 100%;
        justify-content: stretch;
    }

    .edit-btn,
    .delete-btn {
        flex: 1;
    }
}

/* Admin Login Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.admin-login-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    z-index: 2001;
    min-width: 350px;
    max-width: 90%;
    border: 2px solid var(--card-border);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translate(-50%, -40%);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--card-border);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: var(--background-secondary);
    color: var(--primary-orange);
    transform: rotate(90deg);
}

.admin-login-modal input {
    width: 100%;
    padding: 1rem;
    margin: 0.75rem 0;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
}

.admin-login-modal input:focus {
    outline: none;
    border-color: var(--primary-orange);
    box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.admin-login-modal .login-btn {
    width: 100%;
    padding: 1rem;
    margin-top: 1.5rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-orange);
}

.admin-login-modal .login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-orange);
}

.admin-login-modal .login-btn:active {
    transform: translateY(0);
}

.error-message {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    padding: 0.75rem;
    border-radius: 8px;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    text-align: center;
    border: 1px solid rgba(220, 53, 69, 0.3);
}

/* Google AdSense Styles */
.ad-container {
    width: 100%;
    max-width: 728px;
    margin: 2rem auto;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 90px;
    border: 2px dashed var(--card-border);
    position: relative;
    overflow: hidden;
}

.ad-container::before {
    content: 'Advertisement';
    position: absolute;
    top: 5px;
    left: 10px;
    font-size: 0.7rem;
    color: var(--text-muted);
    opacity: 0.5;
}

.ad-container-sidebar {
    width: 160px;
    margin: 1rem 0;
    min-height: 600px;
}

.ad-container-rectangle {
    width: 300px;
    height: 250px;
    margin: 1.5rem auto;
}

.ad-container-horizontal {
    max-width: 728px;
    height: 90px;
}

.ad-container-vertical {
    width: 160px;
    min-height: 600px;
}

/* AdSense Responsive */
@media (max-width: 768px) {
    .ad-container {
        max-width: 100%;
        padding: 0.75rem;
    }
    
    .ad-container-sidebar {
        width: 100%;
        min-height: 250px;
    }
    
    .ad-container-rectangle {
        width: 100%;
        height: auto;
        min-height: 250px;
    }

    .admin-login-modal {
        min-width: 300px;
        padding: 2rem;
    }
}

/* Admin Panel Analytics Cards */
.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.analytics-card {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.analytics-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-orange);
    border-color: var(--primary-orange);
}

.analytics-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.analytics-card h3 {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.analytics-number {
    color: var(--primary-orange);
    font-size: 2.5rem;
    font-weight: 700;
}

.admin-actions {
    margin-top: 3rem;
}

.admin-actions h2 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.action-btn {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow-orange);
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--shadow-orange);
}

.action-btn:active {
    transform: translateY(-1px);
}

/* Attractive Notes Page Styles */
.subjects-grid-notes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.subject-card-large {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 8px 25px var(--shadow-color);
    position: relative;
    overflow: hidden;
    animation: slideInUp 0.6s ease forwards;
    opacity: 0;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subject-card-large::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-dark));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.subject-card-large:hover::before {
    opacity: 0.1;
}

.subject-card-large:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--primary-orange);
    box-shadow: 0 15px 40px var(--shadow-orange);
}

.subject-icon-large {
    font-size: 4rem;
    min-width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.1), rgba(255, 140, 0, 0.05));
    border-radius: 20px;
    transition: all 0.4s ease;
    position: relative;
    z-index: 1;
}

.subject-card-large:hover .subject-icon-large {
    transform: scale(1.2) rotate(10deg);
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.2), rgba(255, 140, 0, 0.1));
}

.subject-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.subject-name-large {
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.subject-card-large:hover .subject-name-large {
    color: var(--primary-orange);
}

.subject-description {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 400;
}

.subject-arrow-large {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary-orange);
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.subject-arrow-large .arrow {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.subject-card-large:hover .subject-arrow-large .arrow {
    transform: translateX(10px);
}

/* Admin Panel Styles */
.analytics-section {
    margin-bottom: 3rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.add-btn {
    background: linear-gradient(135deg, #28a745, #20c997);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.add-btn:hover {
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.admin-message {
    background: var(--card-bg);
    border: 2px solid var(--primary-orange);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px var(--shadow-orange);
}

.admin-message pre {
    background: var(--background-secondary);
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 1rem 0;
    border-left: 4px solid var(--primary-orange);
}

.admin-message button {
    background: var(--primary-orange);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.admin-message button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.add-subject-form {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.add-subject-form h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.add-subject-form .form-group {
    margin-bottom: 1.5rem;
}

.add-subject-form label {
    display: block;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.add-subject-form input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--input-border);
    border-radius: 10px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
}

.add-subject-form input:focus {
    outline: none;
    border-color: var(--primary-orange);
    box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.current-subjects {
    margin-top: 2rem;
}

.current-subjects h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.subjects-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.subject-item {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.3s ease;
}

.subject-item:hover {
    border-color: var(--primary-orange);
    box-shadow: 0 4px 15px var(--shadow-orange);
    transform: translateX(5px);
}

.subject-item-icon {
    font-size: 2.5rem;
    min-width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.1), rgba(255, 140, 0, 0.05));
    border-radius: 12px;
}

.subject-item-info {
    flex: 1;
}

.subject-item-info h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.drive-link {
    color: var(--primary-orange);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.drive-link:hover {
    text-decoration: underline;
}

.subject-item-actions {
    display: flex;
    gap: 0.75rem;
}

.delete-btn-small {
    background: linear-gradient(135deg, #dc3545, #c82333);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(220, 53, 69, 0.3);
}

.delete-btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.4);
}

.admin-instructions {
    margin-top: 3rem;
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
}

.admin-instructions h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.instruction-card {
    background: var(--background-secondary);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-orange);
}

.instruction-card ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.instruction-card li {
    margin-bottom: 0.5rem;
}

.instruction-card code {
    background: rgba(255, 140, 0, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary-orange);
}

.instruction-card .note {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(255, 140, 0, 0.05);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Responsive Design for New Elements */
@media (max-width: 768px) {
    .subjects-grid-notes {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .subject-card-large {
        flex-direction: column;
        text-align: center;
    }

    .subject-icon-large {
        font-size: 3rem;
        min-width: 70px;
        height: 70px;
    }

    .subject-name-large {
        font-size: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .subject-item {
        flex-direction: column;
        text-align: center;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
    }

    .add-btn {
        width: 100%;
    }
}



/* ===== CUSTOM ADVERTISEMENT STYLES ===== */

.custom-ads-section {
    padding: 0 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.custom-ad-banner {
    margin: 1.5rem 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.18);
    transition: transform 0.2s, box-shadow 0.2s;
}

.custom-ad-banner:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

.custom-ad-banner img {
    width: 100%;
    display: block;
    object-fit: cover;
}

.custom-ad-link {
    display: block;
    text-decoration: none;
}

/* Admin - Ad Management */
.ad-management-section {
    margin-bottom: 2rem;
    border: 2px solid var(--accent-color, #6c63ff);
    border-radius: 16px;
    padding: 1.5rem;
}

.ads-grid-admin {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.ad-card-admin {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--card-bg, rgba(255,255,255,0.05));
    border-radius: 12px;
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
}

.ad-card-admin img {
    width: 120px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.ad-card-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.ad-card-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.ad-card-link {
    font-size: 0.75rem;
    opacity: 0.6;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ad-preview-box {
    margin: 0.75rem 0;
    padding: 1rem;
    background: var(--card-bg, rgba(255,255,255,0.05));
    border-radius: 10px;
}