/* ========================================
   M.S COMPUTER Academy - Main Stylesheet
   Mobile-first PWA Design
   ======================================== */

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --secondary: #6c63ff;
    --success: #34a853;
    --warning: #fbbc04;
    --danger: #ea4335;
    --dark: #202124;
    --gray: #5f6368;
    --light-gray: #f1f3f4;
    --border: #e0e0e0;
    --white: #ffffff;
    --dark-bg: #0f172a;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 5px 20px rgba(0,0,0,0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f8f9fa;
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 70px;
}

body::-webkit-scrollbar {
    width: 8px;
}

body::-webkit-scrollbar-track {
    background: #f1f1f1;
}

body::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    width: 100%;
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 16px;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
    display: flex;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 16px rgba(26, 115, 232, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary-light);
}

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

.btn-white-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-live {
    background: var(--danger);
    color: var(--white);
    animation: pulse 2s infinite;
}

.btn-live:hover {
    background: #d93025;
}

.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

/* ========================================
   Alert
   ======================================== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideDown 0.3s ease;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-close {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
}

/* ========================================
   Top Bar
   ======================================== */
.top-bar {
    background: var(--dark-bg);
    color: var(--white);
    font-size: 13px;
    padding: 6px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: #7ce38b;
    transition: var(--transition);
}

.top-bar a:hover {
    text-decoration: underline;
}

/* ========================================
   Header / Navigation
   ======================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-name {
    font-size: 18px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: 0.5px;
}

.logo-sub {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 1px;
}

.nav {
    display: none;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-link.btn-login {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.nav-link.btn-register {
    background: var(--primary);
    color: var(--white);
}

.nav-link.btn-register:hover {
    background: var(--primary-dark);
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(135deg, #1a73e8 0%, #6c63ff 50%, #8b5cf6 100%);
    color: var(--white);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.hero-title .highlight {
    color: #ffd60a;
    position: relative;
}

.hero-subtitle {
    font-size: 16px;
    opacity: 0.95;
    margin-bottom: 30px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 28px;
    font-weight: 800;
}

.stat-label {
    font-size: 13px;
    opacity: 0.9;
}

.hero-graphic {
    display: none;
}

.code-block {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 16px;
    padding: 24px;
    font-family: 'Courier New', monospace;
    backdrop-filter: blur(10px);
}

.code-line {
    color: #fff;
    font-size: 14px;
    margin-bottom: 6px;
}

.keyword { color: #ffd60a; }
.class-name { color: #00e676; }
.string { color: #ff80ab; }

/* ========================================
   Alert Section (Today's classes)
   ======================================== */
.alert-section {
    padding: 20px 0;
}

.today-classes {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--warning);
}

.today-classes h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--dark);
}

.classes-scroll {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.class-card-sm {
    min-width: 160px;
    background: var(--light-gray);
    border-radius: var(--radius-sm);
    padding: 12px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: relative;
}

.class-time {
    font-weight: 700;
    color: var(--primary);
    font-size: 14px;
}

.class-title {
    font-size: 13px;
    font-weight: 600;
    margin: 4px 0;
}

.class-course {
    font-size: 12px;
    color: var(--gray);
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-live {
    background: var(--danger);
    color: var(--white);
    position: absolute;
    top: 8px;
    right: 8px;
    animation: pulse 1.5s infinite;
}

.badge-success {
    background: #d4edda;
    color: var(--success);
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: var(--danger);
}

.badge-secondary {
    background: var(--light-gray);
    color: var(--gray);
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: 50px 0;
}

.section-alt {
    background: var(--white);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 30px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 8px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin: 12px auto 0;
}

.section-header p {
    color: var(--gray);
    font-size: 16px;
}

.text-center {
    text-align: center;
}

/* ========================================
   Courses Grid
   ======================================== */
.courses-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.course-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.course-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary);
}

.course-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

.course-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark);
}

.course-info p {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.6;
}

.course-meta {
    display: flex;
    gap: 16px;
    margin: 12px 0;
}

.course-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-light);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
}

.course-syllabus {
    background: var(--light-gray);
    padding: 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
}

/* Full course card (courses.php) */
.course-card-full {
    gap: 20px;
}

.course-header {
    display: flex;
    align-items: center;
    gap: 16px;
}

.course-icon-large {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 28px;
}

.course-title-area h2 {
    font-size: 22px;
    font-weight: 700;
}

.course-tags {
    display: flex;
    gap: 8px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.course-tag {
    background: var(--primary-light);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.course-tag.fee {
    background: #ffefe0;
    color: #f97316;
}

.course-details {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.course-details h4 {
    font-size: 15px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--dark);
}

.syllabus-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.syllabus-tag {
    background: var(--light-gray);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
}

.course-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.course-price {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 12px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.price-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--dark);
}

.course-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* ========================================
   Features Grid
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.feature-card h3 {
    font-size: 17px;
    margin-bottom: 8px;
    color: var(--dark);
}

.feature-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.6;
}

/* ========================================
   Classes Grid
   ======================================== */
.classes-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.class-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 16px;
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.class-card:hover {
    box-shadow: var(--shadow-lg);
}

.class-date {
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-sm);
    text-align: center;
    padding: 8px 16px;
    min-width: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.class-date.past {
    background: var(--light-gray);
    color: var(--gray);
}

.class-date .day {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.1;
}

.class-date .month {
    font-size: 13px;
    text-transform: uppercase;
    font-weight: 600;
}

.class-date .year {
    font-size: 11px;
    opacity: 0.8;
}

.class-info {
    flex: 1;
    min-width: 180px;
}

.class-info h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--dark);
}

.class-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--gray);
    margin-bottom: 6px;
}

.class-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.class-teacher {
    font-size: 13px;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 5px;
}

.class-action {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-end;
}

/* Filter bar */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    flex: 1;
}

.filter-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray);
}

.filter-chip {
    padding: 6px 14px;
    border-radius: 50px;
    background: var(--light-gray);
    font-size: 13px;
    font-weight: 500;
    color: var(--gray);
    transition: var(--transition);
}

.filter-chip:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.filter-chip.active {
    background: var(--primary);
    color: var(--white);
}

.date-filter-form {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray);
}

.date-filter-form input[type="date"] {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 14px;
    outline: none;
}

/* ========================================
   Notes Grid
   ======================================== */
.notes-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.note-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: var(--transition);
}

.note-card:hover {
    box-shadow: var(--shadow-lg);
}

.note-type {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.note-type.pdf {
    background: #feedf2;
    color: #e91e63;
}

.note-type.video {
    background: #e8f0fe;
    color: var(--primary);
}

.note-type.image {
    background: #d4edda;
    color: var(--success);
}

.note-type.doc {
    background: #fff3cd;
    color: #f9a825;
}

.note-type.link {
    background: #e8d5f5;
    color: #7b1fa2;
}

.note-info {
    flex: 1;
    min-width: 150px;
}

.note-info h4 {
    font-size: 14px;
    margin-bottom: 6px;
    color: var(--dark);
    line-height: 1.4;
}

.note-info p {
    font-size: 12px;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 2px;
}

.note-desc {
    margin-top: 4px;
    font-size: 12px;
    color: var(--gray);
    line-height: 1.5;
}

.note-actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.download-btn {
    white-space: nowrap;
}

/* Date group */
.date-group {
    margin-bottom: 30px;
}

.date-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.date-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.notes-count {
    font-size: 13px;
    color: var(--gray);
    font-weight: 500;
}

/* ========================================
   Empty State
   ======================================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i {
    font-size: 64px;
    color: #ddd;
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 20px;
    color: var(--gray);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--gray);
}

.empty-state-sm {
    text-align: center;
    padding: 20px;
    color: var(--gray);
    font-size: 14px;
}

/* ========================================
   Page Hero
   ======================================== */
.page-hero {
    background: linear-gradient(135deg, #1a73e8 0%, #6c63ff 100%);
    color: var(--white);
    padding: 50px 0;
    text-align: center;
}

.page-hero-sm {
    padding: 35px 0;
}

.page-hero h1 {
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 8px;
}

.page-hero p {
    font-size: 15px;
    opacity: 0.95;
}

/* ========================================
   Auth Cards
   ======================================== */
.section-center {
    display: flex;
    justify-content: center;
}

.section-center .container {
    max-width: 600px;
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px 24px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.auth-card-lg {
    max-width: 600px;
}

.auth-logo {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 16px;
    box-shadow: 0 4px 16px rgba(26, 115, 232, 0.4);
}

.auth-card h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}

.auth-card > p:not(.text-muted) {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 24px;
}

.auth-form {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.auth-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 14px;
}

.auth-footer p {
    margin-bottom: 6px;
}

.auth-footer a {
    color: var(--primary);
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ========================================
   Form Elements
   ======================================== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group > i {
    position: absolute;
    left: 14px;
    color: var(--gray);
    font-size: 14px;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 12px 14px 12px 40px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
    background: var(--white);
    font-family: inherit;
}

.input-group select {
    padding-right: 30px;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%235f6368' viewBox='0 0 16 16'%3E%3Cpath d='M8 8l4-4 1 1-5 5-5-5 1-1z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.password-toggle {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 16px;
}

.textarea-group textarea {
    min-height: 120px;
    resize: vertical;
    padding-top: 12px;
    padding-left: 40px;
}

.form-help {
    font-size: 12px;
    color: var(--gray);
    margin-top: 4px;
    display: block;
}

/* File upload */
.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 2px dashed var(--primary);
    border-radius: var(--radius-sm);
    padding: 24px;
    cursor: pointer;
    color: var(--primary);
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
    text-align: center;
}

.file-upload-label:hover {
    background: var(--primary-light);
}

.file-upload-label i {
    font-size: 24px;
}

.img-thumb {
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
}

/* ========================================
   Payment Page
   ======================================== */
.payment-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.payment-course-card,
.bank-details-card,
.payment-form-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.payment-course-card h3,
.bank-details-card h3,
.payment-form-card h2 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--dark);
}

.payment-course-card p {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 4px;
}

.payment-breakdown {
    margin-top: 16px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.pay-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
}

.pay-row.total {
    border-top: 2px solid var(--border);
    margin-top: 8px;
    padding-top: 12px;
    font-size: 16px;
}

.text-green { color: var(--success); }
.text-orange { color: #f97316; }

.bank-info {
    background: var(--light-gray);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin: 16px 0;
}

.bank-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.bank-row:last-child {
    border-bottom: none;
}

.bank-row span {
    color: var(--gray);
}

.bank-row strong {
    color: var(--dark);
}

.upi-code {
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    padding: 16px;
    text-align: center;
    margin-top: 12px;
}

.upi-code span {
    font-weight: 700;
    color: var(--primary);
    font-size: 16px;
}

.upi-code p {
    color: var(--gray);
    font-size: 13px;
    margin-top: 4px;
}

.payment-note {
    margin-top: 16px;
    background: #fff3cd;
    border-radius: var(--radius-sm);
    padding: 12px;
    font-size: 13px;
    color: #856404;
}

.text-muted {
    color: var(--gray);
}

/* ========================================
   Contact Page
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    text-align: center;
}

.contact-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 12px;
}

.contact-icon.telegram {
    background: #e3f2fd;
    color: #039be5;
}

.contact-icon.phone {
    background: #e8f5e9;
    color: #43a047;
}

.contact-icon.email {
    background: #fff3e0;
    color: #fb8c00;
}

.contact-card h3 {
    font-size: 16px;
    margin-bottom: 6px;
}

.contact-card p {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 12px;
}

.contact-number {
    font-size: 18px !important;
    font-weight: 700;
    color: var(--dark) !important;
}

.contact-form {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-lg);
}

.contact-form h2 {
    font-size: 22px;
    margin-bottom: 6px;
}

.contact-form > p {
    color: var(--gray);
    margin-bottom: 20px;
}

/* ========================================
   Dashboard
   ======================================== */
.dashboard {
    padding: 30px 0;
}

.dashboard-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.dashboard-sidebar {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    position: sticky;
    top: 80px;
    align-self: start;
}

.sidebar-profile {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 24px;
    text-align: center;
}

.profile-avatar {
    width: 70px;
    height: 70px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 12px;
    border: 3px solid rgba(255,255,255,0.5);
    overflow: hidden;
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sidebar-profile h3 {
    font-size: 16px;
    margin-bottom: 4px;
}

.sidebar-profile p {
    font-size: 13px;
    opacity: 0.9;
    word-break: break-all;
}

.sidebar-profile .badge {
    margin-top: 8px;
    background: rgba(255,255,255,0.2);
    color: var(--white);
}

.sidebar-nav {
    padding: 12px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    color: var(--gray);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 4px;
}

.sidebar-link i {
    width: 20px;
    text-align: center;
}

.sidebar-link:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.sidebar-link.active {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.sidebar-link.logout {
    color: var(--danger);
}

.sidebar-link.logout:hover {
    background: #f8d7da;
}

.dashboard-content {
    min-width: 0;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.dashboard-header h1 {
    font-size: 24px;
    font-weight: 800;
}

.dashboard-header p {
    color: var(--gray);
    font-size: 14px;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: #d4edda; color: var(--success); }
.stat-icon.orange { background: #fff3e0; color: #fb8c00; }
.stat-icon.purple { background: #e8d5f5; color: #7b1fa2; }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--dark);
}

.stat-label {
    font-size: 11px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Dashboard panels */
.dashboard-panel {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 24px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.panel-header h3 {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.link-more {
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
}

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

/* Mini class list */
.mini-class-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mini-class {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--light-gray);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary);
}

.mini-class-time {
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.mini-class-info {
    flex: 1;
    min-width: 0;
}

.mini-class-info h5 {
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mini-class-info p {
    font-size: 12px;
    color: var(--gray);
}

.mini-class-action {
    display: flex;
    align-items: center;
    gap: 6px;
}

.join-btn, .download-btn-sm {
    width: 34px;
    height: 34px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.join-btn:hover, .download-btn-sm:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

/* Mini note list */
.mini-note-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mini-note {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--light-gray);
    border-radius: var(--radius-sm);
}

.mini-note-icon {
    width: 40px;
    height: 40px;
    background: #feedf2;
    color: #e91e63;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.mini-note-info {
    flex: 1;
    min-width: 0;
}

.mini-note-info h5 {
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mini-note-info p {
    font-size: 12px;
    color: var(--gray);
}

/* Notification list */
.notification-list {
    display: flex;
    flex-direction: column;
}

.notification-item {
    display: flex;
    gap: 12px;
    padding: 14px;
    border-bottom: 1px solid var(--border);
    align-items: flex-start;
}

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

.notification-item.unread {
    background: var(--primary-light);
}

.notif-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notif-content {
    flex: 1;
}

.notif-content h5 {
    font-size: 14px;
    margin-bottom: 4px;
}

.notif-content p {
    font-size: 13px;
    color: var(--gray);
}

.notif-time {
    font-size: 11px;
    color: var(--gray);
}

/* Fee card */
.fee-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    border-top: 4px solid var(--primary);
}

.fee-course h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.fee-course p {
    color: var(--gray);
    font-size: 13px;
}

.fee-label {
    font-size: 11px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
}

.fee-value {
    font-size: 20px;
    font-weight: 800;
}

.fee-value.paid {
    color: var(--success);
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table th {
    text-align: left;
    padding: 12px;
    background: var(--light-gray);
    font-size: 12px;
    text-transform: uppercase;
    color: var(--gray);
    font-weight: 600;
}

.table td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
}

.table tr:hover td {
    background: #fafafa;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 60px 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 16px;
    opacity: 0.95;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 50px 0 0;
    margin-top: 50px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-col h3 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--white);
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.footer-col p {
    color: #b0bec5;
    font-size: 14px;
    line-height: 1.7;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: #b0bec5;
    font-size: 14px;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #b0bec5;
    font-size: 14px;
}

.contact-info i {
    color: var(--primary);
    width: 16px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.social-link {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
}

.social-link.telegram {
    background: #039be5;
    color: var(--white);
}

.social-link.phone {
    background: #43a047;
    color: var(--white);
}

.social-link.email {
    background: #fb8c00;
    color: var(--white);
}

.social-link:hover {
    transform: translateY(-4px);
    opacity: 0.9;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 16px 0;
    text-align: center;
    font-size: 13px;
    color: #78909c;
}

/* ========================================
   Mobile Bottom Nav
   ======================================== */
.mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-around;
    padding: 8px 6px;
    z-index: 1000;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    font-size: 10px;
    color: var(--gray);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    min-width: 60px;
}

.mobile-nav-item i {
    font-size: 18px;
    transition: var(--transition);
}

.mobile-nav-item.active {
    color: var(--primary);
    background: var(--primary-light);
}

.mobile-nav-item.active i {
    transform: scale(1.1);
}

/* ========================================
   PWA Install Banner
   ======================================== */
.pwa-banner {
    position: fixed;
    bottom: 65px;
    left: 0;
    right: 0;
    background: var(--dark-bg);
    color: var(--white);
    padding: 12px 0;
    z-index: 999;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

.pwa-banner .container {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: space-between;
}

.pwa-banner span {
    font-size: 14px;
    flex: 1;
}

/* ========================================
   Loading Spinner
   ======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-gray);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ========================================
   Animations
   ======================================== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

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

@keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

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

/* ========================================
   Responsive - Desktop
   ======================================== */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }
    
    .nav {
        display: flex;
    }
    
    .hamburger {
        display: none;
    }
    
    .mobile-nav {
        display: none;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero .container {
        grid-template-columns: 1.2fr 0.8fr;
        align-items: center;
    }
    
    .hero-title {
        font-size: 44px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-graphic {
        display: block;
    }
    
    .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .classes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .notes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pwa-banner {
        bottom: 0;
    }
}

@media (min-width: 1024px) {
    .courses-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .notes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .course-details {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 0.8fr 1.2fr;
    }
    
    .payment-layout {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
    
    /* Dashboard */
    .dashboard-layout {
        grid-template-columns: 270px 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr;
    }
    
    .fee-card {
        grid-template-columns: 1fr 1fr 1fr 1fr;
    }
}

/* ========================================
   Additional helpers
   ======================================== */
.text-sm { font-size: 13px; }
.font-bold { font-weight: 700; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }

/* Smoke effect */
.alert-section .today-classes i {
    color: var(--warning);
}