/* ==========================================
   CSS Reset & Base Styles
   ========================================== */

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

:root {
    /* Modern Professional Color Palette */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --accent-color: #0ea5e9;
    --accent-light: #38bdf8;

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-heading: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ==========================================
   Dark Mode Variables
   ========================================== */

[data-theme="dark"] {
    /* Dark Mode Color Palette */
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --accent-color: #0ea5e9;
    --accent-light: #38bdf8;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;

    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Smooth transitions for dark mode */
*,
*::before,
*::after {
    transition: background-color var(--transition-base), 
                color var(--transition-base), 
                border-color var(--transition-base),
                box-shadow var(--transition-base);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

/* ==========================================
   Utility Classes
   ========================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   Navigation & Header
   ========================================== */

.header {
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar {
    padding: var(--spacing-md) 0;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-base);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary-color);
    color: white !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-radius: var(--radius-lg);
    transition: background var(--transition-base), transform var(--transition-fast);
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.nav-cta::after {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ==========================================
   Hero Section
   ========================================== */

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    animation: fadeInUp 0.6s ease;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease;
}

.hero-highlight {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: 1px auto;
    max-width: 700px;
    animation: fadeInUp 1s ease;
}

.hero-highlight p {
    font-size: 1.125rem;
    margin: 0;
}

.hero-actions {
    margin-top: var(--spacing-xl);
    animation: fadeInUp 1.2s ease;
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

/* ==========================================
   Search Section
   ========================================== */

.search-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    background: white;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    pointer-events: none;
}

/* ==========================================
   Sections
   ========================================== */

.subjects-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 0 auto;
    border-radius: 2px;
}

/* ==========================================
   Subject Cards
   ========================================== */

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.subject-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.subject-card:nth-child(1) {
    animation-delay: 0.1s;
}

.subject-card:nth-child(2) {
    animation-delay: 0.2s;
}

.subject-card:nth-child(3) {
    animation-delay: 0.3s;
}

.subject-card:nth-child(4) {
    animation-delay: 0.4s;
}

.subject-card:nth-child(5) {
    animation-delay: 0.5s;
}

.subject-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.subject-card:hover .card-image img {
    transform: scale(1.1);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
}

.card-content {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.card-btn {
    flex: 1;
    min-width: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.card-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.125rem;
}

/* ==========================================
   Contact Section
   ========================================== */

.contact-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.contact-card {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    text-align: center;
    color: white;
    box-shadow: var(--shadow-xl);
}

.contact-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.contact-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: white;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.footer-section h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: var(--text-light);
    line-height: 1.8;
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-light);
    transition: color var(--transition-base);
}

.footer-section a:hover {
    color: var(--accent-light);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--text-light);
}

/* ==========================================
   Back to Top Button
   ========================================== */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* ==========================================
   Animations
   ========================================== */

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* ==========================================
   Responsive Design
   ========================================== */
/* 768 */
@media (max-width: 936px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-lg);
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

   
    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero {
        padding: var(--spacing-xl) 0;
    }

    .subjects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xs: 0.375rem;
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }

    .logo h2 {
        font-size: 1.25rem;
    }

    .logo-subtitle {
        font-size: 0.625rem;
    }

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

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

/* ==========================================
   Print Styles
   ========================================== */

@media print {

    .navbar,
    .search-section,
    .back-to-top,
    .footer {
        display: none;
    }

    .subject-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}
 /* coffee section  */
.coffee-section {
    padding: 60px 20px;
    background: #f5f7fa;
    display: flex;
    justify-content: center;
}

.coffee-container {
    max-width: 600px;
    text-align: center;
}

.coffee-container h2 {
    color: #0ea5e9;
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.coffee-container p {
    font-size: 1rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.coffee-btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 1rem;
    background: #fcdf4c;
    color: #000000;
    text-decoration: none;
    border-radius: 6px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.coffee-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

/* shinu */
.shinu {
    display: inline-block;
    padding: 12px 24px;
    font-size: 1rem;
    background: #0ea5e9;
    color: #ffffff;
    text-decoration: none;
    border-radius: 6px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.shinu:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

.coffee-section a {
    color: black;
}

/* Responsive tweak */
@media (max-width: 480px) {
    .coffee-container h2 {
        font-size: 1.4rem;
    }
}

/* contrubtiom */
.contribute-banner {
    background: #2563eb;
    color: white;
    padding: 14px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.contribute-btn {
    background: white;
    color: #2563eb;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: 0.2s;
}

.contribute-btn:hover {
    transform: translateY(-2px);
}

/* whatsapp link */
.whatsapp-join {
    display: flex;
    justify-content: center;
    margin: 40px auto;
    padding: 20px;
}

.wa-box {
    max-width: 650px;
    background: #ffffff;
    padding: 28px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.wa-box h2 {
    margin-bottom: 10px;
    color: #1e293b;
}

.wa-box p {
    margin-bottom: 20px;
    color: #475569;
}

/* WhatsApp style button */
.wa-btn {
    display: inline-block;
    padding: 12px 26px;
    background: #25D366;
    color: white;
    text-decoration: none;
    font-weight: 600;
    border-radius: 30px;
    transition: all .2s ease;
}

.wa-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

/* latest update  */
.latest-section {
    max-width: 1000px;
    margin: 30px auto;
    padding: 20px 25px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
}

.latest-section h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 700;
    color: #111827;
}

.latest-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.latest-section li {
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
}

.latest-section li:last-child {
    border-bottom: none;
}

.latest-section a {
    text-decoration: none;
    font-weight: 600;
    color: #1d4ed8;
    transition: 0.2s ease;
}

.latest-section a:hover {
    color: #2563eb;
    padding-left: 5px;
}

/* Feedback Section */

.feedback-section {
    max-width: 900px;
    margin: 80px auto;
    padding: 40px;
    background: linear-gradient(145deg, #f8fafc, #eef2f7);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.feedback-section h2 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 30px;
    color: #1e293b;
}

/* Form styling */

#feedbackForm {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 40px;
}

#feedbackForm input,
#feedbackForm select,
#feedbackForm textarea {
    padding: 14px;
    border-radius: 10px;
    border: 1px solid #d1d5db;
    font-size: 15px;
    transition: 0.25s;
}

#feedbackForm input:focus,
#feedbackForm textarea:focus,
#feedbackForm select:focus {
    border-color: #2563eb;
    outline: none;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

#feedbackForm textarea {
    min-height: 100px;
    resize: none;
}

#feedbackForm button {
    background: #2563eb;
    color: white;
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.25s;
}

#feedbackForm button:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

/* Feedback Cards */

#feedbackList {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.review-card {
    background: white;
    padding: 18px;
    border-radius: 12px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
    transition: 0.3s;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
}

.review-card strong {
    font-size: 16px;
    color: #0f172a;
}

.review-card p {
    margin-top: 6px;
    font-size: 14px;
    color: #475569;
}

/* Delete Feedback Section */

.delete-feedback{
max-width:420px;
margin:40px auto;
padding:20px;
background:#f8fafc;
border-radius:12px;
box-shadow:0 6px 20px rgba(0,0,0,0.08);
text-align:center;
}

.delete-feedback h3{
font-size:18px;
margin-bottom:15px;
color:#1e293b;
}

.delete-feedback input{
width:100%;
padding:12px;
border:1px solid #d1d5db;
border-radius:8px;
font-size:14px;
margin-bottom:15px;
outline:none;
transition:0.2s;
}

.delete-feedback input:focus{
border-color:#2563eb;
box-shadow:0 0 0 2px rgba(37,99,235,0.1);
}

.delete-feedback button{
width:100%;
padding:12px;
background:#ef4444;
color:white;
border:none;
border-radius:8px;
font-weight:600;
cursor:pointer;
transition:0.25s;
}

.delete-feedback button:hover{
background:#dc2626;
transform:translateY(-1px);
}

.delete-feedback p{
font-size:12px;
color:#64748b;
margin-top:10px;
}

/* delet code popup */
.delete-popup{
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:rgba(0,0,0,0.6);
display:none;
align-items:center;
justify-content:center;
z-index:9999;
}

.delete-popup-content{
background:white;
padding:30px;
border-radius:12px;
text-align:center;
max-width:350px;
width:90%;
box-shadow:0 10px 40px rgba(0,0,0,0.2);
}

.delete-popup-content h3{
margin-bottom:10px;
}

.delete-code-box{
background:#f1f5f9;
padding:15px;
font-size:20px;
font-weight:700;
border-radius:8px;
margin:15px 0;
letter-spacing:2px;
color:#2563eb;
}

.delete-popup-content button{
margin:5px;
padding:10px 16px;
border:none;
border-radius:6px;
cursor:pointer;
font-weight:600;
}

.delete-popup-content button:first-of-type{
background:#2563eb;
color:white;
}

.close-btn{
background:#e5e7eb;
}

/* Rating bar */
.rating-summary{
text-align:center;
margin-bottom:25px;
padding:20px;
background:#f8fafc;
border-radius:10px;
box-shadow:0 4px 15px rgba(0,0,0,0.08);
}

.rating-score{
font-size:28px;
font-weight:700;
color:#f59e0b;
}

.rating-count{
margin-top:5px;
font-size:14px;
color:#64748b;
}

/* Time table   */
.timetable-section{
max-width:1000px;
margin:60px auto;
text-align:center;
}

.tt-title{
font-size:28px;
margin-bottom:30px;
}

.tt-grid{
display:grid;
grid-template-columns:1fr 1fr;
gap:25px;
}

.tt-card{
background:white;
padding:30px;
border-radius:14px;
box-shadow:0 10px 25px rgba(0,0,0,0.08);
cursor:pointer;
transition:0.3s;
}

.tt-card:hover{
transform:translateY(-6px);
box-shadow:0 15px 35px rgba(0,0,0,0.12);
}

.tt-icon{
font-size:40px;
margin-bottom:10px;
}

.tt-card h3{
margin:5px 0;
}

.tt-card p{
color:#64748b;
font-size:14px;
}

/* ==========================================
   Time Table Section
   ========================================== */

.timetable-section{
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.timetable-section .container{
    max-width: 900px;
}

.tt-title{
    font-size: clamp(1.75rem,4vw,2.25rem);
    font-weight: 800;
    margin-bottom: var(--spacing-xl);
    text-align:center;
}

.tt-grid{
    display:grid;
    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
    gap: var(--spacing-lg);
}

.tt-card{
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    cursor:pointer;
    text-align:center;
    transition: all var(--transition-base);
}

.tt-card:hover{
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.tt-icon{
    font-size:2.5rem;
    margin-bottom: var(--spacing-sm);
}

.tt-card h3{
    font-size:1.25rem;
    margin-bottom: var(--spacing-xs);
}

.tt-card p{
    color: var(--text-secondary);
    font-size:0.875rem;
}

/* ==========================================
   Time Table Buttons
   ========================================== */

.timetable-section{
padding: var(--spacing-xl) 0;
background: var(--bg-secondary);
}

.tt-buttons{
display:flex;
justify-content:center;
gap: var(--spacing-md);
flex-wrap:wrap;
margin-top: var(--spacing-lg);
}

.tt-btn{
display:flex;
align-items:center;
gap:8px;

background: var(--bg-primary);
color: var(--text-primary);

padding: var(--spacing-sm) var(--spacing-lg);

border-radius: var(--radius-lg);
border:2px solid var(--border-color);

font-weight:600;
font-size:0.95rem;

box-shadow: var(--shadow-sm);

transition: all var(--transition-base);
}

.tt-btn:hover{
background: var(--primary-color);
border-color: var(--primary-color);
color:white;

transform: translateY(-2px);
box-shadow: var(--shadow-lg);
}

.tt-icon{
font-size:1.2rem;
}

/* Mobile */


.pdf-viewer{
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:white;
display:none;
flex-direction:column;
z-index:9999;
}

.pdf-header{
padding:10px;
background:var(--primary-color);
text-align:right;
}

.pdf-header button{
background:white;
border:none;
padding:6px 14px;
border-radius:var(--radius-md);
font-weight:600;
cursor:pointer;
}

#pdfFrame{
flex:1;
width:100%;
border:none;
}

/* Feedback Reminder Popup */

.feedback-reminder{
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:rgba(0,0,0,0.5);
display:none;
align-items:center;
justify-content:center;
z-index:9999;
}

.reminder-box{
background:white;
padding:30px;
border-radius:14px;
max-width:350px;
width:90%;
text-align:center;
box-shadow:0 20px 40px rgba(0,0,0,0.25);
animation:fadeInUp 0.4s ease;
}

.reminder-box h3{
margin-bottom:10px;
}

.reminder-box p{
font-size:14px;
color:#64748b;
margin-bottom:20px;
}

.reminder-buttons{
display:flex;
gap:10px;
justify-content:center;
}

.reminder-buttons button{
padding:10px 16px;
border:none;
border-radius:6px;
font-weight:600;
cursor:pointer;
}

.reminder-buttons button:first-child{
background:#2563eb;
color:white;
}

.reminder-buttons button:last-child{
background:#e5e7eb;
}

.pinned{
border:2px solid #f59e0b;
background:#fffdf5;
position:relative;
}

.pinned::before{
content:"📌 Pinned";
position:absolute;
top:8px;
right:10px;
font-size:12px;
font-weight:600;
color:#f59e0b;
}
/* ==========================================
   Dark Mode Toggle Button
   ========================================== */

.dark-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-base);
    margin-left: var(--spacing-md);
}

.dark-mode-toggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.dark-mode-toggle:hover svg {
    color: white;
}

.dark-mode-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.dark-mode-toggle .sun-icon,
[data-theme="dark"] .dark-mode-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .dark-mode-toggle .sun-icon {
    display: block;
}

.dark-mode-toggle .moon-icon {
    display: block;
}

/* Dark mode specific adjustments */
[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #4c1d95 100%);
}

[data-theme="dark"] .mobile-menu-toggle span {
    background: var(--text-primary);
}

/* Subject Cards Dark Mode */
[data-theme="dark"] .subject-card {
    background: var(--bg-secondary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .subject-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7);
}

[data-theme="dark"] .card-content {
    background: var(--bg-secondary);
}

[data-theme="dark"] .card-title {
    color: var(--text-primary);
}

[data-theme="dark"] .card-subtitle {
    color: var(--text-secondary);
}

[data-theme="dark"] .card-btn {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .card-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

[data-theme="dark"] .card-overlay {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
}

/* Footer Dark Mode */
[data-theme="dark"] .footer {
    background: #0a0f1e;
}

[data-theme="dark"] .footer-section h3,
[data-theme="dark"] .footer-section h4 {
    color: var(--text-primary);
}

[data-theme="dark"] .footer-section p {
    color: var(--text-secondary);
}

[data-theme="dark"] .footer-section a {
    color: var(--text-secondary);
}

[data-theme="dark"] .footer-section a:hover {
    color: var(--primary-light);
}

[data-theme="dark"] .footer-bottom {
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .card-image {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .card-overlay {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
}

/* Section headers dark mode */
[data-theme="dark"] .section-title {
    color: var(--text-primary);
}

[data-theme="dark"] .subjects-section {
    background: var(--bg-primary);
}

[data-theme="dark"] .section-alt {
    background: var(--bg-secondary);
}

[data-theme="dark"] .contribute-banner {
    background: #1e40af;
}

[data-theme="dark"] .wa-box {
    background: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .wa-box h2,
[data-theme="dark"] .wa-box p {
    color: var(--text-primary);
}

[data-theme="dark"] .latest-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .latest-section h3 {
    color: var(--text-primary);
}

[data-theme="dark"] .latest-section li {
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .feedback-section {
    background: linear-gradient(145deg, var(--bg-secondary), var(--bg-tertiary));
}

[data-theme="dark"] .feedback-section h2 {
    color: var(--text-primary);
}

[data-theme="dark"] #feedbackForm input,
[data-theme="dark"] #feedbackForm select,
[data-theme="dark"] #feedbackForm textarea {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .review-card {
    background: var(--bg-primary);
}

[data-theme="dark"] .review-card strong {
    color: var(--text-primary);
}

[data-theme="dark"] .review-card p {
    color: var(--text-secondary);
}

[data-theme="dark"] .delete-feedback {
    background: var(--bg-secondary);
}

[data-theme="dark"] .delete-feedback h3 {
    color: var(--text-primary);
}

[data-theme="dark"] .delete-feedback input {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .delete-popup-content {
    background: var(--bg-secondary);
}

[data-theme="dark"] .delete-popup-content h3 {
    color: var(--text-primary);
}

[data-theme="dark"] .delete-popup-content p {
    color: var(--text-secondary);
}

[data-theme="dark"] .delete-code-box {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .rating-summary {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .reminder-box {
    background: var(--bg-secondary);
}

[data-theme="dark"] .reminder-box h3 {
    color: var(--text-primary);
}

[data-theme="dark"] .reminder-box p {
    color: var(--text-secondary);
}

[data-theme="dark"] .coffee-section {
    background: var(--bg-secondary);
}

[data-theme="dark"] .coffee-container h2 {
    color: var(--accent-color);
}

[data-theme="dark"] .coffee-container p {
    color: var(--text-secondary);
}

[data-theme="dark"] .tt-card {
    background: var(--bg-secondary);
}

[data-theme="dark"] .tt-card h3 {
    color: var(--text-primary);
}

[data-theme="dark"] .tt-card p {
    color: var(--text-secondary);
}

[data-theme="dark"] .pdf-header {
    background: var(--primary-dark);
}

/* Mobile responsive for dark mode toggle */
@media (max-width: 936px) {
    .dark-mode-toggle {
        margin-left: auto;
        margin-right: var(--spacing-sm);
    }
}