/* ==========================================================================
   TESDAM Aula Virtual - Design System & Stylesheet
   Stack: Vanilla CSS, Responsive, Glassmorphic, Premium Legal Branding
   ========================================================================== */

/* Design Tokens & Theme Variables */
:root {
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    
    /* Harmonious Slate Beige Color Palette */
    --color-bg: #f5f2ed;
    --color-text: #1a1a1a;
    --color-text-muted: #666666;
    --color-gold: #c5a059;
    --color-gold-hover: #b08d48;
    --color-gold-light: rgba(197, 160, 89, 0.15);
    --color-dark: #0a0a0a;
    --color-border: #e5e0d8;
    --color-card-bg: #ffffff;
    --color-white: #ffffff;
    
    /* State colors */
    --color-success: #166534;
    --color-success-bg: #f0fdf4;
    --color-success-border: rgba(34, 197, 94, 0.2);
    --color-warning: #92400e;
    --color-warning-bg: #fffbeb;
    --color-warning-border: rgba(245, 158, 11, 0.2);
    --color-danger: #991b1b;
    --color-danger-bg: #fef2f2;
    --color-danger-border: rgba(239, 68, 68, 0.2);

    /* Shadows & Transitions */
    --shadow-sm: 0 2px 8px rgba(10, 10, 10, 0.04);
    --shadow-md: 0 10px 30px rgba(10, 10, 10, 0.05);
    --shadow-lg: 0 20px 40px rgba(10, 10, 10, 0.08);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
}

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

html, body {
    width: 100%;
    overflow-x: hidden;
}

body.aula-body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.25;
}

a {
    color: var(--color-gold);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-gold-hover);
}

/* Layout Main wrappers */
.aula-main {
    flex: 1 0 auto;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px 40px; /* Space for fixed navbar */
}

.aula-footer {
    flex-shrink: 0;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-card-bg);
    padding: 25px 20px;
    text-align: center;
}

.aula-footer__container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.aula-footer__copyright {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.aula-footer__help {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.aula-footer__help a {
    font-weight: 600;
}

/* Navigation Bar */
.aula-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(245, 242, 237, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-gold-light);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.aula-nav__container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.aula-nav__brand {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.aula-nav__brand-title {
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-dark);
    text-transform: uppercase;
}

.aula-nav__brand-sub {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    font-style: italic;
    color: var(--color-gold);
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.aula-nav__menu {
    display: flex;
    align-items: center;
    gap: 24px;
}

.aula-nav__link {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text);
    font-weight: 500;
}

.aula-nav__link:hover {
    color: var(--color-gold);
}

/* User Dropdown */
.aula-nav__user-dropdown {
    position: relative;
}

.aula-nav__user-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 30px;
    padding: 6px 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-family: inherit;
    transition: var(--transition);
}

.aula-nav__user-btn:hover {
    background-color: var(--color-white);
    border-color: var(--color-gold);
}

.aula-nav__user-avatar {
    width: 24px;
    height: 24px;
    background-color: var(--color-gold);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

.aula-nav__user-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.aula-nav__user-arrow {
    width: 14px;
    height: 14px;
    color: var(--color-text-muted);
}

.aula-nav__dropdown-card {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 220px;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    display: none;
    flex-direction: column;
    padding: 8px 0;
    z-index: 1010;
}

.aula-nav__dropdown-card.active {
    display: flex;
}

.dropdown-header {
    padding: 12px 16px;
    text-align: left;
}

.dropdown-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text);
}

.dropdown-role {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--color-border);
    margin: 4px 0;
}

.dropdown-item {
    background: transparent;
    border: none;
    padding: 10px 16px;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
}

.dropdown-item:hover {
    background-color: var(--color-bg);
    color: var(--color-gold);
}

.dropdown-item--danger {
    color: var(--color-danger);
}

.dropdown-item--danger:hover {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.dropdown-icon {
    width: 16px;
    height: 16px;
}

/* Form Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--color-gold);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(197, 160, 89, 0.2);
}

.btn-primary:hover {
    background: var(--color-gold-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(197, 160, 89, 0.3);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.75rem;
}

/* Authentication Views */
.auth-container {
    min-height: calc(100vh - 170px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
}

.auth-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 440px;
    padding: 40px;
    text-align: center;
    transition: var(--transition);
}

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

.auth-card__brand {
    margin-bottom: 30px;
}

.auth-kicker {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--color-gold);
    font-weight: 600;
}

.auth-title {
    font-size: 2.2rem;
    font-weight: 500;
    margin: 5px 0 10px;
    color: var(--color-dark);
}

.auth-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.auth-form {
    text-align: left;
}

.auth-error-box {
    background-color: var(--color-danger-bg);
    border: 1px solid var(--color-danger-border);
    color: var(--color-danger);
    font-size: 0.85rem;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group-row {
    display: flex;
    gap: 15px;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg);
    border-radius: 6px;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--color-text);
    outline: none;
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--color-gold);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(197, 160, 89, 0.15);
}

.auth-card__footer {
    margin-top: 30px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.auth-link {
    font-weight: 600;
}

/* Dashboard View */
.dashboard-container {
    padding-top: 20px;
}

.dash-welcome {
    margin-bottom: 40px;
}

.dash-welcome__kicker {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-gold);
    font-weight: 600;
    display: block;
    margin-bottom: 6px;
}

.dash-welcome__title {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 400;
    color: var(--color-dark);
}

.dash-welcome__subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin-top: 6px;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.stat-card__num {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1;
}

.stat-card__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-top: 6px;
    font-weight: 600;
}

.stat-card--active {
    border-color: var(--color-gold-light);
    background: linear-gradient(180deg, var(--color-white) 0%, rgba(197, 160, 89, 0.05) 100%);
    color: var(--color-gold-hover);
}

.stat-card--pending {
    border-color: var(--color-warning-border);
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-warning-bg) 100%);
    color: var(--color-warning);
}

.stat-card--success {
    border-color: var(--color-success-border);
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-success-bg) 100%);
    color: var(--color-success);
}

/* Courses Grid */
.courses-section {
    margin-top: 40px;
}

.courses-section__title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--color-dark);
    margin-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 10px;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.courses-empty {
    background-color: var(--color-white);
    border: 1px dashed var(--color-border);
    border-radius: var(--border-radius);
    padding: 60px 40px;
    text-align: center;
    max-width: 600px;
    margin: 40px auto;
}

.courses-empty__icon {
    margin-bottom: 15px;
}

.courses-empty__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-dark);
}

.courses-empty__desc {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-top: 5px;
    max-width: 450px;
    margin: 8px auto 0;
}

/* Premium Course Card */
.course-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--transition);
}

.course-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background-color: var(--color-border);
    z-index: 2;
}

.course-card--active {
    border-color: rgba(197, 160, 89, 0.3);
}

.course-card--active::before {
    background-color: var(--color-gold);
}

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

.course-card--pending {
    border-style: dashed;
    border-color: var(--color-warning-border);
    background-color: var(--color-warning-bg);
}

.course-card--pending::before {
    background-color: var(--color-warning);
}

.course-card__media {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #2b2823 0%, var(--color-dark) 100%);
    overflow: hidden;
    position: relative;
}

.course-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
    transition: var(--transition);
}

.course-card:hover .course-card__img {
    transform: scale(1.03);
    opacity: 0.85;
}

.course-card__badge {
    position: absolute;
    top: 15px;
    left: 15px;
    z-index: 5;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.course-card__badge--active {
    background-color: var(--color-gold);
    color: var(--color-white);
}

.course-card__badge--pending {
    background-color: var(--color-warning);
    color: var(--color-white);
}

.course-card__body {
    padding: 24px;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
}

.course-card__meta {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-gold);
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.course-card__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 10px;
}

.course-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: 20px;
}

.course-card__progress {
    margin-top: auto;
    margin-bottom: 20px;
}

.course-card__progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.course-card__progress-bar {
    height: 6px;
    background-color: var(--color-bg);
    border-radius: 3px;
    overflow: hidden;
}

.course-card__progress-fill {
    height: 100%;
    background-color: var(--color-gold);
    border-radius: 3px;
}

.course-card__footer {
    padding-top: 15px;
    border-top: 1px solid var(--color-border);
}

.course-card__warning {
    font-size: 0.85rem;
    color: var(--color-warning);
    font-weight: 500;
}

/* Skeleton Loading styles */
.course-card-skeleton {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    height: 350px;
    overflow: hidden;
}

.skeleton-media {
    height: 160px;
    background: linear-gradient(90deg, #ece9e2 25%, #e1dbcf 50%, #ece9e2 75%);
    background-size: 200% 100%;
    animation: loadingPulse 1.5s infinite;
}

.skeleton-body {
    padding: 24px;
}

.skeleton-line {
    height: 14px;
    background: linear-gradient(90deg, #ece9e2 25%, #e1dbcf 50%, #ece9e2 75%);
    background-size: 200% 100%;
    margin-bottom: 12px;
    border-radius: 4px;
    animation: loadingPulse 1.5s infinite;
}

.line-title { width: 60%; height: 18px; margin-bottom: 18px; }
.line-desc { width: 90%; }
.line-button { width: 40%; height: 35px; margin-top: 25px; }

@keyframes loadingPulse {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Player Workspace */
.player-container {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 170px);
}

.player-header {
    border-bottom: 1px solid var(--color-border);
    padding: 15px 0;
    margin-bottom: 25px;
}

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

.player-back-btn {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.player-back-btn:hover {
    color: var(--color-gold);
}

.player-course-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--color-dark);
}

.player-progress-bar {
    display: flex;
    align-items: center;
    gap: 10px;
}

.player-progress-bar__track {
    width: 100px;
    height: 6px;
    background-color: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.player-progress-bar__fill {
    height: 100%;
    background-color: var(--color-gold);
}

.player-progress-bar__label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.player-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
    align-items: start;
}

/* Sidebar nav */
.player-sidebar {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.player-sidebar__title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 15px;
    font-weight: 700;
}

.player-sidebar__menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.player-sidebar__item {
    font-size: 0.9rem;
    border-radius: 6px;
    transition: var(--transition);
}

.player-sidebar__link {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    color: var(--color-text);
    font-weight: 500;
    gap: 10px;
    border-radius: 6px;
}

.player-sidebar__item--active .player-sidebar__link {
    background-color: var(--color-gold-light);
    color: var(--color-gold-hover);
    font-weight: 600;
}

.player-sidebar__item--locked .player-sidebar__link {
    opacity: 0.5;
    cursor: not-allowed;
}

.player-sidebar__item--locked .player-sidebar__link:hover {
    color: var(--color-text);
}

.player-sidebar__icon {
    flex-shrink: 0;
}

/* Active lesson area */
.player-content {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    min-height: 500px;
}

.player-content__scroll-wrapper {
    padding: 40px;
}

.lesson-header {
    margin-bottom: 30px;
}

.lesson-kicker {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gold);
    font-weight: 600;
}

.lesson-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 400;
    color: var(--color-dark);
    margin-top: 4px;
}

.lesson-description {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-top: 10px;
    line-height: 1.5;
}

.lesson-body-content {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 40px;
}

.lesson-body-content p {
    margin-bottom: 20px;
}

.lesson-body-content ul, .lesson-body-content ol {
    margin-left: 20px;
    margin-bottom: 20px;
}

.lesson-body-content li {
    margin-bottom: 8px;
}

.lesson-actions {
    padding-top: 25px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
}

/* PDF Viewer Card */
.pdf-viewer-card {
    background-color: #2b2823;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 25px 0 35px;
    box-shadow: var(--shadow-md);
}

.pdf-toolbar {
    background-color: #1a1715;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #3d3935;
}

.pdf-toolbar__title {
    color: #e5e0d8;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pdf-toolbar__controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pdf-btn {
    background: transparent;
    border: 1px solid #3d3935;
    border-radius: 4px;
    color: #e5e0d8;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.pdf-btn:hover {
    background-color: #3d3935;
    color: var(--color-white);
}

.pdf-canvas-viewport {
    padding: 20px;
    max-height: 600px;
    overflow-y: auto;
    background-color: #24211e;
    user-select: none;
    -webkit-user-select: none;
}

.pdf-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 0;
    color: #a8a29a;
    font-size: 0.9rem;
    gap: 12px;
}

.pdf-loader-spinner {
    width: 30px;
    height: 30px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: var(--color-gold);
    border-radius: 50%;
    animation: spin 1s infinite linear;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.pdf-canvas-page-wrapper {
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    background-color: #fff;
    display: inline-block;
}

.pdf-canvas-page-wrapper canvas {
    display: block;
}

/* Quiz Styles */
.quiz-card {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 30px 0;
}

.quiz-card__header {
    background-color: var(--color-bg);
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}

.quiz-card__title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-dark);
}

.quiz-card__desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.quiz-card__body {
    padding: 24px;
}

.quiz-q-fieldset {
    border: none;
    margin-bottom: 25px;
}

.quiz-q-legend {
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.quiz-choice-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    margin-bottom: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: var(--transition);
}

.quiz-choice-label:hover {
    background-color: var(--color-bg);
    border-color: var(--color-gold);
}

.quiz-choice-label input[type="radio"] {
    accent-color: var(--color-gold);
}

.quiz-card__footer {
    padding: 15px 24px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-white);
}

.quiz-attempts {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* Modal result overlays */
.aula-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(4px);
    z-index: 11000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.aula-modal-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    max-width: 480px;
    width: 100%;
    padding: 40px;
    text-align: center;
    position: relative;
}

.aula-modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
}

.aula-modal-close:hover {
    color: var(--color-dark);
}

.aula-modal-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.aula-modal-card--success .aula-modal-icon {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.aula-modal-card--error .aula-modal-icon {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.aula-modal-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-dark);
}

.aula-modal-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-top: 2px;
}

.aula-modal-score-row {
    background-color: var(--color-bg);
    border-radius: 6px;
    padding: 15px;
    margin: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.score-label {
    font-weight: 600;
    font-size: 0.9rem;
}

.score-val {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-gold-hover);
}

.aula-modal-desc {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: 30px;
}

.aula-modal-btn {
    width: 100%;
    justify-content: center;
}

/* Confetti styles */
.aula-confetti {
    position: fixed;
    z-index: 12000;
    pointer-events: none;
}

/* Certificate Card inside Player */
.certificate-unlock-card {
    background: linear-gradient(135deg, #2b2823 0%, var(--color-dark) 100%);
    border: 1px solid var(--color-gold);
    border-radius: var(--border-radius);
    padding: 40px;
    color: var(--color-white);
    display: flex;
    align-items: center;
    gap: 30px;
    margin-top: 30px;
    box-shadow: var(--shadow-lg);
}

.certificate-unlock-card__icon {
    font-size: 4rem;
    line-height: 1;
}

.certificate-unlock-card__body {
    flex: 1;
}

.certificate-unlock-card__title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 400;
    color: var(--color-gold);
}

.certificate-unlock-card__desc {
    color: #c9c5be;
    margin-top: 8px;
    margin-bottom: 25px;
    font-size: 1rem;
    line-height: 1.5;
}

.certificate-unlock-card__actions {
    display: flex;
    gap: 12px;
}

/* Profile Form styling overrides */
.aula-modal-card .form-group {
    width: 100%;
}

/* Toast System */
.aula-toast {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 15000;
    border-left: 4px solid var(--color-gold);
}

.aula-toast--visible {
    transform: translateY(0);
    opacity: 1;
}

.aula-toast--error {
    border-left-color: var(--color-danger);
}

.aula-toast--success {
    border-left-color: var(--color-success);
}

/* Responsive Overrides */
@media (max-width: 991px) {
    .player-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .courses-grid {
        grid-template-columns: 1fr;
    }
    .form-group-row {
        flex-direction: column;
        gap: 0;
    }
    .dash-welcome__title {
        font-size: 2.2rem;
    }
    .certificate-unlock-card {
        flex-direction: column;
        text-align: center;
        padding: 30px 20px;
    }
    .certificate-unlock-card__actions {
        flex-direction: column;
        width: 100%;
    }
    .certificate-unlock-card__actions a {
        width: 100%;
    }
    .aula-nav__user-name {
        display: none;
    }
}

/* Specificity overrides to maintain flex layout when views are active */
.auth-container.view-section.active {
    display: flex;
}
.player-container.view-section.active {
    display: flex;
}

/* Navigation Tabs in Player */
.player-tabs-wrapper {
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 25px;
}

.player-tabs {
    display: flex;
    gap: 20px;
}

.player-tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 10px 5px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.player-tab-btn:hover {
    color: var(--color-gold);
}

.player-tab-btn.active {
    color: var(--color-gold-hover);
    border-bottom-color: var(--color-gold);
}

.player-tab-panel {
    display: none;
}

.player-tab-panel.active {
    display: block;
}

/* Forum / Consultas styling */
.forum-section {
    display: flex;
    flex-direction: column;
    gap: 30px;
    text-align: left;
}

.forum-form-box {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 24px;
}

.forum-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.forum-subtitle {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--color-dark);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
    margin-top: 15px;
}

.forum-comments-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.forum-post-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 18px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.forum-post-card:hover {
    box-shadow: var(--shadow-md);
}

.forum-post-card.instructor-post {
    border-color: var(--color-gold-light);
    background: linear-gradient(180deg, var(--color-white) 0%, rgba(197, 160, 89, 0.03) 100%);
    border-left: 4px solid var(--color-gold);
}

.forum-post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.forum-post-author {
    font-weight: 600;
    color: var(--color-dark);
}

.badge-instructor {
    background-color: var(--color-gold);
    color: var(--color-white);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 6px;
    display: inline-block;
}

.forum-post-date {
    color: var(--color-text-muted);
}

.forum-post-body {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.5;
}

.empty-forum {
    text-align: center;
    padding: 30px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-style: italic;
}

/* Split Login/Register Layout styles */
.auth-card--split {
    max-width: 900px !important;
    padding: 0 !important;
    display: grid !important;
    grid-template-columns: 1.1fr 1.3fr !important;
    overflow: hidden;
    border-radius: var(--border-radius);
    text-align: left !important;
}

.auth-card__sidebar {
    background: linear-gradient(135deg, var(--color-dark) 0%, #152238 100%);
    color: var(--color-white);
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    text-align: left;
    border-right: 1px solid var(--color-border);
}

.auth-sidebar-title {
    font-family: var(--font-serif);
    font-size: 2.6rem;
    font-weight: 500;
    margin: 10px 0;
    color: var(--color-gold);
    line-height: 1.1;
}

.auth-sidebar-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
    line-height: 1.5;
}

.auth-benefits {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.auth-benefits li {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.4;
}

.auth-card__content {
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-color: var(--color-white);
}

.auth-form-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    color: var(--color-dark);
    margin-bottom: 8px;
    font-weight: 400;
}

.auth-form-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 25px;
}

@media (max-width: 768px) {
    .auth-card--split {
        grid-template-columns: 1fr !important;
    }
    .auth-card__sidebar {
        display: none !important;
    }
}

/* =========================================================
   Player Tabs (Content / Forum)
   ========================================================= */
.player-tabs {
    display: flex;
    gap: 4px;
    padding: 16px 20px 0;
    border-bottom: 2px solid var(--color-border);
    background-color: var(--color-white);
    position: sticky;
    top: 70px;
    z-index: 50;
}

.player-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: -2px;
}

.player-tab-btn:hover {
    color: var(--color-gold);
}

.player-tab-btn.active {
    color: var(--color-gold);
    border-bottom-color: var(--color-gold);
}

.player-tab-panel {
    display: none;
}

.player-tab-panel.active {
    display: block;
}

/* =========================================================
   Forum / Consultas
   ========================================================= */
.forum-container {
    padding: 30px;
    max-width: 780px;
}

.forum-header {
    margin-bottom: 24px;
}

.forum-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.forum-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.forum-form {
    margin-bottom: 30px;
}

.forum-textarea {
    width: 100%;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg);
    border-radius: 8px;
    padding: 14px 16px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--color-text);
    outline: none;
    resize: vertical;
    transition: var(--transition);
    display: block;
}

.forum-textarea:focus {
    border-color: var(--color-gold);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(197, 160, 89, 0.15);
}

.forum-comments-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 10px;
}

.forum-post-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 18px 22px;
    box-shadow: var(--shadow-sm);
}

.forum-post-card.instructor-post {
    border-left: 4px solid var(--color-gold);
    background-color: rgba(197, 160, 89, 0.03);
}

.forum-post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.forum-post-author {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--color-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge-instructor {
    background: var(--color-gold-light);
    color: var(--color-gold-hover);
    border: 1px solid rgba(197, 160, 89, 0.3);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.forum-post-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.forum-post-body {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.6;
}

.empty-forum {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    text-align: center;
    padding: 30px;
    background: var(--color-bg);
    border-radius: 8px;
    border: 1px dashed var(--color-border);
}

/* =========================================================
   Loading Spinner Keyframe
   ========================================================= */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* =========================================================
   View Section Animations
   ========================================================= */
.view-section.active {
    animation: viewFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

@keyframes viewFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animate stat cards on entrance */
.stat-card {
    animation: cardSlideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) both;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card:nth-child(1) { animation-delay: 0.05s; }
.stat-card:nth-child(2) { animation-delay: 0.1s; }
.stat-card:nth-child(3) { animation-delay: 0.15s; }

@keyframes cardSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animate course cards */
.course-card {
    animation: cardSlideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.course-card:nth-child(1) { animation-delay: 0.1s; }
.course-card:nth-child(2) { animation-delay: 0.2s; }
.course-card:nth-child(3) { animation-delay: 0.3s; }

/* Progress bar fill transition */
.course-card__progress-fill,
.player-progress-bar__fill {
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Button disabled state */
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Confetti particles */
.aula-confetti {
    position: fixed;
    z-index: 99999;
    pointer-events: none;
    border-radius: 2px;
}

/* =========================================================
   Responsive Design — Tablet and Mobile
   ========================================================= */
@media (max-width: 1024px) {
    .courses-grid {
        grid-template-columns: 1fr;
    }

    .player-layout {
        grid-template-columns: 1fr;
    }

    .player-sidebar {
        order: -1;
    }

    .player-header__inner {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .player-course-title {
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    .aula-main {
        padding: 75px 16px 30px;
    }

    .aula-nav__container {
        padding: 0 16px;
    }

    .aula-nav__menu {
        gap: 12px;
    }

    .aula-nav__link {
        display: none;
    }

    .dash-welcome__title {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .auth-card {
        padding: 30px 24px;
    }

    .auth-card--large {
        max-width: 100%;
    }

    .form-group-row {
        flex-direction: column;
        gap: 0;
    }

    .lesson-title {
        font-size: 1.6rem;
    }

    .player-content__scroll-wrapper {
        padding: 24px 20px;
    }

    .player-tabs {
        top: 60px;
        padding: 12px 16px 0;
    }

    .player-tab-btn {
        padding: 8px 14px;
        font-size: 0.75rem;
    }

    .forum-container {
        padding: 20px 16px;
    }

    .quiz-choice-label {
        font-size: 0.88rem;
        padding: 10px 12px;
    }

    .pdf-toolbar {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

    .aula-modal-card {
        padding: 30px 24px;
    }

    .aula-modal-overlay {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .dash-welcome__title {
        font-size: 1.6rem;
    }

    .dash-welcome__subtitle {
        font-size: 0.9rem;
    }

    .player-course-title {
        font-size: 1.2rem;
    }

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

    .aula-nav__user-name {
        display: none;
    }
}

/* ==========================================================================
   LMS Quiz Builder & Question Editor Styles
   ========================================================================== */
.lms-quiz-builder {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.lms-quiz-q {
    padding: 15px;
    border: 1px solid var(--color-admin-border);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.02);
}

.lms-quiz-q-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 10px 15px;
    margin-bottom: 10px;
}

.lms-quiz-q-label {
    flex: 1;
    min-width: 200px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-admin-text);
}

.lms-quiz-qtext {
    display: block;
    width: 100%;
    margin-top: 8px;
    padding: 8px 12px;
    border: 1px solid var(--color-admin-border);
    border-radius: 6px;
    background: var(--color-admin-surface);
    color: var(--color-admin-text);
    font: inherit;
}

.lms-quiz-qtext:focus,
.lms-quiz-choice-txt:focus {
    border-color: var(--color-admin-gold);
    outline: none;
}

.lms-quiz-q-del {
    flex-shrink: 0;
    font-size: 0.8rem;
    background: #4a1515 !important;
    border-color: #6a1f1f !important;
    color: #ff9999 !important;
}

.lms-quiz-q-del:hover {
    background: #6a1f1f !important;
}

.lms-quiz-choices {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lms-quiz-choice-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lms-quiz-choice-row .lms-quiz-choice-correct {
    flex-shrink: 0;
    accent-color: var(--color-admin-gold);
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.lms-quiz-choice-row .lms-quiz-choice-txt {
    flex: 1;
    min-width: 0;
    padding: 8px 10px;
    border: 1px solid var(--color-admin-border);
    border-radius: 6px;
    background: var(--color-admin-surface);
    color: var(--color-admin-text);
    font: inherit;
}

.lms-quiz-add-choice {
    margin-top: 8px;
    font-size: 0.8rem;
    width: auto !important;
    padding: 4px 8px !important;
}

.lms-quiz-builder-actions {
    margin: 5px 0 0;
}