/* Modern & Refined Styling for Costura Creativa */

:root {
    /* Color Palette */
    --primary-hsl: 343, 76%, 48%; /* Rich crimson rose */
    --primary: hsl(var(--primary-hsl));
    --primary-hover: hsl(343, 76%, 40%);
    --primary-light: hsl(343, 76%, 95%);
    --primary-glow: hsla(var(--primary-hsl), 0.15);
    
    --secondary-hsl: 255, 45%, 45%; /* Royal Velvet violet */
    --secondary: hsl(var(--secondary-hsl));
    --secondary-light: hsl(255, 45%, 96%);

    --accent: hsl(36, 100%, 60%); /* Gold/Warm Mustard */
    
    /* Neutrals */
    --bg-base: hsl(30, 20%, 98%); /* Soft warm linen background */
    --bg-surface: hsl(0, 0%, 100%); /* Pure white cards */
    --bg-surface-glass: rgba(255, 255, 255, 0.85);
    
    --border-color: hsl(30, 10%, 90%);
    --border-focus: hsl(343, 76%, 70%);

    --text-primary: hsl(30, 25%, 12%); /* Very dark brown/grey */
    --text-secondary: hsl(30, 10%, 40%);
    --text-muted: hsl(30, 8%, 60%);
    --text-light: hsl(0, 0%, 100%);

    /* UI Tokens */
    --font-sans: 'Outfit', sans-serif;
    --font-serif: 'Playfair Display', serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-sm: 0 2px 8px rgba(30, 15, 10, 0.04);
    --shadow-md: 0 12px 32px rgba(30, 15, 10, 0.08);
    --shadow-lg: 0 24px 48px rgba(30, 15, 10, 0.12);
    --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
    background: hsl(30, 10%, 80%);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: hsl(343, 30%, 70%);
}

/* Header & Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-surface-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo span {
    font-family: var(--font-sans);
    font-weight: 300;
    color: var(--primary);
    font-size: 1.4rem;
    margin-left: 2px;
}

.logo-icon {
    stroke: var(--primary);
    stroke-width: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    font-size: 0.95rem;
}

.nav-link i {
    width: 18px;
    height: 18px;
    transition: var(--transition-smooth);
}

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

.nav-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    background-color: var(--text-primary);
    color: var(--text-light);
    font-weight: 500;
    padding: 0.75rem 1.4rem;
    border-radius: 50px;
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.95rem;
}

.nav-btn:hover {
    background-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
}

/* App Main Content */
.app-content {
    flex: 1;
    max-width: 1300px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

.app-view {
    display: none;
    animation: fadeIn 0.4s ease-out forwards;
}

.app-view.active {
    display: block;
}

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

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--primary);
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: var(--font-sans);
    font-size: 1rem;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    text-decoration: none;
    font-weight: 600;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-family: var(--font-sans);
}

.btn-secondary:hover {
    background-color: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-full {
    width: 100%;
}

.btn-text {
    background: none;
    border: none;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
    transition: var(--transition-smooth);
}

.btn-text:hover {
    color: var(--primary-hover);
}

/* 1. HOME VIEW */
.hero-section {
    text-align: center;
    padding: 5rem 1rem 4rem 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 350;
}

/* Catalog Grid */
.catalog-section {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.section-tag {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 2px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    color: var(--text-primary);
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.course-card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-focus);
}

.course-img-placeholder {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.course-icon-bg {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.course-icon-bg i {
    width: 32px;
    height: 32px;
}

.course-card-content {
    padding: 1.75rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-tag {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--secondary);
    background-color: var(--secondary-light);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    margin-bottom: 1rem;
}

.course-card h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.course-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex: 1;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.meta-item i {
    width: 16px;
    height: 16px;
    color: var(--primary);
}

/* Features Grid */
.features-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
}

.feature-card {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
}

.feature-icon i {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 2. LOGIN VIEW */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 250px);
    padding: 2rem 0;
}

.login-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 460px;
    padding: 3rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-icon-box {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem auto;
}

.login-icon-box i {
    width: 24px;
    height: 24px;
}

.login-header h2 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

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

.login-divider::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--border-color);
    z-index: 1;
}

.login-divider span {
    background-color: var(--bg-surface);
    padding: 0 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    position: relative;
    z-index: 2;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.input-icon {
    position: absolute;
    left: 1.2rem;
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.input-wrapper input, .input-wrapper select {
    width: 100%;
    padding: 0.9rem 1rem 0.9rem 2.8rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.input-wrapper input:focus, .input-wrapper select:focus, .input-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary);
    background-color: var(--bg-surface);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.input-wrapper textarea {
    width: 100%;
    padding: 0.9rem 1.2rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    resize: vertical;
}

.error-msg {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: hsl(0, 100%, 97%);
    border: 1px solid hsl(0, 100%, 90%);
    color: hsl(0, 85%, 40%);
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

.error-msg i {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.login-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.login-footer i {
    width: 14px;
    height: 14px;
    display: inline-block;
    vertical-align: middle;
    color: var(--secondary);
    margin-right: 2px;
}

/* 3. STUDENT PORTAL */
.portal-header {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    color: var(--text-light);
    padding: 2.5rem 3rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
}

.portal-welcome {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.portal-subtitle {
    color: hsla(0, 0%, 100%, 0.85);
    font-weight: 300;
}

.portal-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
    align-items: start;
}

.portal-sidebar {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-title i {
    color: var(--primary);
    width: 18px;
    height: 18px;
}

.student-courses-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.student-course-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-radius: var(--radius-sm);
    background-color: var(--bg-base);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
    cursor: pointer;
}

.student-course-item:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

.student-course-item.active {
    background-color: var(--primary);
    color: var(--text-light);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.student-course-item i {
    width: 16px;
    height: 16px;
}

.portal-placeholder {
    background-color: var(--bg-surface);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 5rem 2rem;
    text-align: center;
    color: var(--text-secondary);
}

.placeholder-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--bg-base);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
}

.placeholder-icon i {
    width: 36px;
    height: 36px;
}

.portal-placeholder h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.portal-viewer {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.course-header-banner {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-sm);
}

.course-header-banner h2 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.course-header-banner p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.viewer-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 2rem;
}

.video-container-wrapper {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.video-ratio-box {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background-color: #000;
}

.video-frame-container {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
}

.video-frame-container iframe, .video-frame-container video {
    width: 100%;
    height: 100%;
    border: none;
}

.video-info-card {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.video-info-card h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.video-info-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    white-space: pre-line;
}

.playlist-section {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    max-height: 550px;
}

.playlist-title {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.playlist-title i {
    color: var(--primary);
    width: 18px;
    height: 18px;
}

.playlist-items {
    overflow-y: auto;
    flex: 1;
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
    cursor: pointer;
    font-weight: 500;
}

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

.playlist-item:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

.playlist-item.active {
    background-color: var(--secondary-light);
    color: var(--secondary);
    border-left: 4px solid var(--secondary);
    padding-left: 1rem;
}

.playlist-item-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--bg-base);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.playlist-item.active .playlist-item-num {
    background-color: var(--secondary);
    color: var(--text-light);
}

.playlist-item-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 4. ADMIN DASHBOARD */
.admin-header {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.admin-title i {
    color: var(--primary);
}

.admin-subtitle {
    color: var(--text-secondary);
}

.admin-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn i {
    width: 18px;
    height: 18px;
}

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

.tab-btn.active {
    color: var(--text-light);
    background-color: var(--primary);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-pane.active {
    display: block;
}

.admin-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 2rem;
    align-items: start;
}

.admin-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

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

.card-header h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header h3 i {
    color: var(--primary);
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.label-heading {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.1rem;
}

.form-help {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.input-note {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Checklist of Courses */
.courses-checklist {
    border: 1px solid var(--border-color);
    background-color: var(--bg-base);
    border-radius: var(--radius-sm);
    padding: 1rem;
    max-height: 180px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
}

.checklist-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* User Directory & Table */
.search-bar-wrapper {
    position: relative;
    margin-bottom: 1.5rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.search-input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.6rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    background-color: var(--bg-base);
}

.table-responsive {
    overflow-x: auto;
}

.users-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.users-table th {
    background-color: var(--bg-base);
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.users-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.users-table tr:hover td {
    background-color: var(--primary-light);
}

.user-cell-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-cell-username {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.badge-key {
    background-color: var(--bg-base);
    color: var(--text-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.8rem;
}

.badges-courses-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    max-width: 300px;
}

.course-badge {
    font-size: 0.75rem;
    background-color: var(--secondary-light);
    color: var(--secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 50px;
    font-weight: 600;
}

.course-badge.empty {
    background-color: hsl(0, 0%, 90%);
    color: var(--text-muted);
}

.actions-cell {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-icon i {
    width: 16px;
    height: 16px;
}

.btn-icon.edit:hover {
    background-color: var(--secondary-light);
    color: var(--secondary);
    border-color: var(--secondary);
}

.btn-icon.delete:hover {
    background-color: hsl(0, 100%, 95%);
    color: hsl(0, 80%, 40%);
    border-color: hsl(0, 80%, 80%);
}

/* Course lessons tree in Admin */
.course-tree {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tree-course-node {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.tree-course-header {
    background-color: var(--bg-base);
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.tree-course-header span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tree-course-header i {
    color: var(--primary);
    width: 18px;
    height: 18px;
}

.tree-class-list {
    background-color: var(--bg-surface);
}

.tree-class-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.tree-class-item:hover {
    background-color: var(--primary-light);
}

.class-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.class-info i {
    color: var(--text-muted);
    width: 16px;
    height: 16px;
}

.class-empty {
    padding: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

/* Footer styling */
.footer {
    margin-top: auto;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
}

.footer-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* Responsive Rules */
@media (max-width: 1024px) {
    .portal-layout {
        grid-template-columns: 1fr;
    }
    .viewer-grid {
        grid-template-columns: 1fr;
    }
    .admin-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-surface);
        border-bottom: 1px solid var(--border-color);
        padding: 1.5rem;
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.show {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

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

    .login-card {
        padding: 1.5rem;
    }
    .modal-overlay {
        align-items: flex-start;
        padding: 1rem 0.5rem;
    }
}

/* Modals styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(30, 15, 10, 0.4);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    overflow-y: auto;
    padding: 2rem 1rem;
    animation: fadeIn 0.25s ease-out;
}

.modal-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 500px;
    overflow: hidden;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.modal-header-box h3 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    border-radius: 50%;
}

.modal-close:hover {
    background-color: var(--bg-base);
    color: var(--text-primary);
}

.modal-body-box {
    padding: 2rem;
}

.purchase-summary {
    background-color: var(--primary-light);
    border: 1px solid hsla(var(--primary-hsl), 0.15);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
}

.summary-label {
    color: var(--text-secondary);
}

.purchase-summary strong {
    color: var(--primary);
    font-size: 1.05rem;
}

.purchase-info-box {
    background-color: var(--secondary-light);
    border-left: 4px solid var(--secondary);
    padding: 0.75rem 1rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 1rem 0;
}

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