/* ═══════════════════════════════════════════════════════════════
   SOLSTA ACADEMY — Frontend Styles
   Brand: #FF4400 (orange), #1a1a1a (black), #ffffff (white)
   Font: Plus Jakarta Sans
   ═══════════════════════════════════════════════════════════════ */

:root {
    --sa-orange: #FF4400;
    --sa-orange-light: #FF6633;
    --sa-orange-dark: #E63D00;
    --sa-orange-bg: #FFF5F0;
    --sa-black: #1a1a1a;
    --sa-gray-900: #2d2d2d;
    --sa-gray-700: #555;
    --sa-gray-500: #888;
    --sa-gray-300: #ccc;
    --sa-gray-200: #e5e5e5;
    --sa-gray-100: #f5f5f5;
    --sa-white: #ffffff;
    --sa-green: #22c55e;
    --sa-radius: 12px;
    --sa-radius-sm: 8px;
    --sa-shadow: 0 4px 24px rgba(0,0,0,0.08);
    --sa-shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --sa-transition: all 0.25s ease;
    --sa-font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ── Reset & Base ──────────────────────────────────────────── */
.sa-catalog, .sa-course, .sa-lesson, .sa-dashboard {
    font-family: var(--sa-font);
    color: var(--sa-black);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.sa-catalog *, .sa-course *, .sa-lesson *, .sa-dashboard * {
    box-sizing: border-box;
}

/* ── Buttons ───────────────────────────────────────────────── */
.sa-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 1.5rem;
    font-family: var(--sa-font);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--sa-radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--sa-transition);
    text-decoration: none;
    white-space: nowrap;
}

.sa-btn--primary {
    background: var(--sa-orange);
    color: var(--sa-white);
    border-color: var(--sa-orange);
}
.sa-btn--primary:hover {
    background: var(--sa-orange-dark);
    border-color: var(--sa-orange-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(255, 68, 0, 0.3);
}

.sa-btn--outline {
    background: transparent;
    color: var(--sa-black);
    border-color: var(--sa-gray-200);
}
.sa-btn--outline:hover {
    border-color: var(--sa-orange);
    color: var(--sa-orange);
}

.sa-btn--full { width: 100%; }

/* ── Progress Bar ──────────────────────────────────────────── */
.sa-progress {
    width: 100%;
    height: 8px;
    background: var(--sa-gray-100);
    border-radius: 100px;
    overflow: hidden;
}
.sa-progress__bar {
    height: 100%;
    background: linear-gradient(90deg, var(--sa-orange), var(--sa-orange-light));
    border-radius: 100px;
    transition: width 0.6s ease;
    min-width: 0;
}
.sa-progress__text {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--sa-gray-700);
    margin-top: 0.4rem;
}

/* ═══════════════════════════════════════════════════════════════
   CATALOG
   ═══════════════════════════════════════════════════════════════ */
.sa-catalog { max-width: 1100px; margin: 0 auto; padding: 2rem 1rem; }

.sa-catalog__header { text-align: center; margin-bottom: 2.5rem; }
.sa-catalog__title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--sa-black);
    margin: 0 0 0.3rem;
}
.sa-catalog__subtitle {
    font-size: 1.05rem;
    color: var(--sa-gray-500);
    margin: 0;
}

.sa-catalog__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* ── Course Card ───────────────────────────────────────────── */
.sa-card {
    background: var(--sa-white);
    border-radius: var(--sa-radius);
    overflow: hidden;
    border: 1px solid var(--sa-gray-200);
    transition: var(--sa-transition);
    position: relative;
}
.sa-card:hover {
    border-color: var(--sa-orange);
    box-shadow: var(--sa-shadow-lg);
    transform: translateY(-4px);
}

.sa-card--featured {
    border-color: var(--sa-orange);
    box-shadow: 0 0 0 1px var(--sa-orange);
}

.sa-card__badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--sa-orange);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.sa-card__image {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-color: var(--sa-gray-100);
    position: relative;
}
/* Fallback gradient when no image */
.sa-card__image:not([style*="url"]),
.sa-card__image[style*="url('')"] {
    background: linear-gradient(135deg, #1a1a1a 0%, #333 50%, var(--sa-orange-dark) 100%);
}

.sa-card__modalidad {
    position: absolute;
    bottom: 0.75rem;
    left: 0.75rem;
    background: rgba(0,0,0,0.75);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.sa-card__body { padding: 1.25rem; }
.sa-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 0.75rem;
    line-height: 1.35;
    color: var(--sa-black);
}

.sa-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.sa-card__meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.8rem;
    color: var(--sa-gray-500);
}
.sa-card__meta-item svg { flex-shrink: 0; opacity: 0.6; }

.sa-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--sa-gray-100);
}

.sa-card__price-usd {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--sa-black);
}
.sa-card__price-cop {
    display: block;
    font-size: 0.8rem;
    color: var(--sa-gray-500);
}

/* ═══════════════════════════════════════════════════════════════
   COURSE PAGE
   ═══════════════════════════════════════════════════════════════ */
.sa-course { max-width: 1100px; margin: 0 auto; }

/* Hero */
.sa-course__hero {
    height: 320px;
    background-size: cover;
    background-position: center;
    background-color: var(--sa-black);
    border-radius: 0 0 var(--sa-radius) var(--sa-radius);
    overflow: hidden;
}
.sa-course__hero-overlay {
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.85) 100%);
    display: flex;
    align-items: flex-end;
    padding: 2rem;
}
.sa-course__hero-content { color: white; }

.sa-course__badge {
    display: inline-block;
    background: var(--sa-orange);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.sa-course__title {
    font-size: 1.8rem;
    font-weight: 800;
    margin: 0 0 0.75rem;
    line-height: 1.25;
}

.sa-course__hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    font-size: 0.9rem;
    opacity: 0.85;
}
.sa-course__hero-meta strong { color: var(--sa-orange-light); }

/* Layout */
.sa-course__layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 2rem;
    padding: 2rem 1rem;
}

@media (max-width: 768px) {
    .sa-course__layout { grid-template-columns: 1fr; }
    .sa-course__sidebar { order: -1; }
}

/* Main content */
.sa-course__main {}
.sa-course__description { margin-bottom: 2rem; }
.sa-course__description h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0 0 1rem;
}
.sa-course__description p {
    color: var(--sa-gray-700);
    margin-bottom: 0.8rem;
}
.sa-course__description ul {
    list-style: none;
    padding: 0;
}
.sa-course__description li {
    padding: 0.3rem 0;
    color: var(--sa-gray-700);
}
.sa-course__description li::before {
    content: '•';
    color: var(--sa-orange);
    font-weight: 700;
    margin-right: 0.5rem;
}

/* Promo banner */
.sa-course__promo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--sa-orange-bg);
    border: 1px solid rgba(255, 68, 0, 0.15);
    border-radius: var(--sa-radius-sm);
    padding: 1rem 1.25rem;
    margin-bottom: 2rem;
    color: var(--sa-orange-dark);
    font-size: 0.9rem;
}
.sa-course__promo svg { flex-shrink: 0; color: var(--sa-orange); }

/* Curriculum */
.sa-course__curriculum h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.sa-module {
    border: 1px solid var(--sa-gray-200);
    border-radius: var(--sa-radius-sm);
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.sa-module__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    cursor: pointer;
    background: var(--sa-gray-100);
    transition: var(--sa-transition);
}
.sa-module__header:hover { background: var(--sa-gray-200); }

.sa-module__title {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0;
}
.sa-module__count {
    font-size: 0.8rem;
    color: var(--sa-gray-500);
}

.sa-module__arrow {
    transition: transform 0.25s ease;
    color: var(--sa-gray-500);
}
.sa-module--open .sa-module__arrow { transform: rotate(180deg); }

.sa-module__lessons {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}
.sa-module--open .sa-module__lessons { max-height: 1000px; }

.sa-lesson-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--sa-gray-100);
    transition: var(--sa-transition);
}
.sa-lesson-item:hover { background: var(--sa-orange-bg); }

.sa-lesson-item__left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}
.sa-lesson-item__num {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--sa-gray-300);
    min-width: 1.5rem;
}
.sa-lesson-item__title {
    font-size: 0.9rem;
    color: var(--sa-black);
    text-decoration: none;
}
a.sa-lesson-item__title:hover { color: var(--sa-orange); }

.sa-lesson-item__right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.sa-lesson-item__dur {
    font-size: 0.75rem;
    color: var(--sa-gray-500);
}
.sa-lesson-item__check {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--sa-green);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
}
.sa-lesson-item--done .sa-lesson-item__title { color: var(--sa-gray-500); }
.sa-lesson-item svg { color: var(--sa-gray-300); }

/* Sidebar */
.sa-course__sidebar-card {
    background: var(--sa-white);
    border: 1px solid var(--sa-gray-200);
    border-radius: var(--sa-radius);
    padding: 1.5rem;
    position: sticky;
    top: 2rem;
    box-shadow: var(--sa-shadow);
}

.sa-course__price-box { text-align: center; margin-bottom: 1.25rem; }
.sa-course__price-main {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--sa-black);
}
.sa-course__price-main span { font-size: 1rem; font-weight: 600; color: var(--sa-gray-500); }
.sa-course__price-alt {
    font-size: 0.9rem;
    color: var(--sa-gray-500);
    margin-top: 0.2rem;
}

.sa-course__sidebar-card .sa-btn { margin-bottom: 0.5rem; }

.sa-course__demo-note {
    font-size: 0.75rem;
    color: var(--sa-gray-500);
    text-align: center;
    margin: 0.5rem 0 1rem;
    font-style: italic;
}

.sa-course__progress-section { text-align: center; margin-bottom: 1.25rem; }
.sa-course__progress-section h3 {
    font-size: 1rem;
    margin: 0 0 0.75rem;
}

.sa-course__sidebar-details { margin-top: 1.5rem; border-top: 1px solid var(--sa-gray-100); padding-top: 1.25rem; }
.sa-course__sidebar-details h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin: 0 0 0.75rem;
    color: var(--sa-gray-700);
}
.sa-course__sidebar-details ul { list-style: none; padding: 0; margin: 0; }
.sa-course__sidebar-details li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 0;
    font-size: 0.85rem;
    color: var(--sa-gray-700);
}
.sa-course__sidebar-details li svg { color: var(--sa-orange); flex-shrink: 0; }

/* ═══════════════════════════════════════════════════════════════
   LESSON PAGE
   ═══════════════════════════════════════════════════════════════ */
.sa-lesson { max-width: 1200px; margin: 0 auto; padding: 0 1rem 2rem; }

.sa-lesson__breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0;
    font-size: 0.85rem;
}
.sa-lesson__breadcrumb a {
    color: var(--sa-orange);
    text-decoration: none;
    font-weight: 600;
}
.sa-lesson__breadcrumb-sep { color: var(--sa-gray-300); }

/* Video */
.sa-lesson__video {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--sa-black);
    border-radius: var(--sa-radius);
    overflow: hidden;
    margin-bottom: 1.5rem;
}
.sa-lesson__video iframe {
    width: 100%;
    height: 100%;
    border: none;
}
.sa-lesson__video-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--sa-gray-500);
    gap: 0.5rem;
}
.sa-lesson__video-placeholder svg { color: var(--sa-gray-300); }
.sa-lesson__video-placeholder p { font-size: 1.1rem; margin: 0; }
.sa-lesson__video-placeholder span { font-size: 0.8rem; color: var(--sa-gray-500); }

/* Layout */
.sa-lesson__layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
}
@media (max-width: 768px) {
    .sa-lesson__layout { grid-template-columns: 1fr; }
}

.sa-lesson__title {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 0 0.5rem;
}
.sa-lesson__dur {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--sa-gray-500);
    margin-bottom: 1.5rem;
}

.sa-lesson__body {
    color: var(--sa-gray-700);
    margin-bottom: 2rem;
}
.sa-lesson__body p { margin-bottom: 1rem; }

/* Actions */
.sa-lesson__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--sa-gray-200);
}

.sa-lesson__completed-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: #f0fdf4;
    color: var(--sa-green);
    border-radius: var(--sa-radius-sm);
    font-weight: 700;
    font-size: 0.9rem;
}

.sa-lesson__nav { display: flex; gap: 0.5rem; }

/* Sidebar lesson list */
.sa-lesson__sidebar h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.sa-lesson__list {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--sa-gray-200);
    border-radius: var(--sa-radius-sm);
}
.sa-lesson__list::-webkit-scrollbar { width: 4px; }
.sa-lesson__list::-webkit-scrollbar-thumb { background: var(--sa-gray-300); border-radius: 100px; }

.sa-lesson__list-module {
    padding: 0.5rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sa-gray-500);
    background: var(--sa-gray-100);
    border-bottom: 1px solid var(--sa-gray-200);
}

.sa-lesson__list-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    font-size: 0.8rem;
    color: var(--sa-gray-700);
    text-decoration: none;
    border-bottom: 1px solid var(--sa-gray-100);
    transition: var(--sa-transition);
}
.sa-lesson__list-item:hover { background: var(--sa-orange-bg); }
.sa-lesson__list-item--active {
    background: var(--sa-orange-bg);
    color: var(--sa-orange);
    font-weight: 600;
    border-left: 3px solid var(--sa-orange);
}
.sa-lesson__list-item--done { color: var(--sa-gray-500); }
.sa-lesson__list-item--done .sa-lesson__list-status { color: var(--sa-green); }

.sa-lesson__list-status {
    font-size: 0.75rem;
    min-width: 1.2rem;
    text-align: center;
}

.sa-lesson__list-progress {
    padding: 0.75rem;
    border: 1px solid var(--sa-gray-200);
    border-top: none;
    border-radius: 0 0 var(--sa-radius-sm) var(--sa-radius-sm);
    font-size: 0.75rem;
    color: var(--sa-gray-500);
}

/* ═══════════════════════════════════════════════════════════════
   DASHBOARD
   ═══════════════════════════════════════════════════════════════ */
.sa-dashboard { max-width: 1100px; margin: 0 auto; padding: 2rem 1rem; }

.sa-dashboard__header { margin-bottom: 2rem; }
.sa-dashboard__header h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin: 0 0 0.3rem;
}
.sa-dashboard__header p {
    color: var(--sa-gray-500);
    margin: 0;
}

.sa-dashboard__empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--sa-gray-500);
}
.sa-dashboard__empty svg { color: var(--sa-gray-300); margin-bottom: 1rem; }
.sa-dashboard__empty h3 {
    font-size: 1.2rem;
    color: var(--sa-black);
    margin: 0 0 0.5rem;
}
.sa-dashboard__empty p { margin: 0 0 1.5rem; }

.sa-dashboard__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.sa-dash-card {
    background: var(--sa-white);
    border: 1px solid var(--sa-gray-200);
    border-radius: var(--sa-radius);
    overflow: hidden;
    transition: var(--sa-transition);
}
.sa-dash-card:hover {
    border-color: var(--sa-orange);
    box-shadow: var(--sa-shadow);
}

.sa-dash-card__image {
    height: 140px;
    background-size: cover;
    background-position: center;
    background: linear-gradient(135deg, #1a1a1a, var(--sa-orange-dark));
    position: relative;
}

.sa-dash-card__body { padding: 1.25rem; }
.sa-dash-card__body h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.sa-dash-card__stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--sa-gray-500);
    margin: 0.5rem 0 1rem;
}

/* ═══════════════════════════════════════════════════════════════
   UTILITIES
   ═══════════════════════════════════════════════════════════════ */
.sa-empty {
    text-align: center;
    padding: 3rem;
    color: var(--sa-gray-500);
    font-size: 1rem;
}

/* Toast notification */
.sa-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--sa-black);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--sa-radius-sm);
    font-family: var(--sa-font);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--sa-shadow-lg);
    z-index: 9999;
    transform: translateY(120%);
    transition: transform 0.35s ease;
}
.sa-toast--visible { transform: translateY(0); }
.sa-toast--success { border-left: 4px solid var(--sa-green); }
.sa-toast--error { border-left: 4px solid #ef4444; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 640px) {
    .sa-catalog__grid { grid-template-columns: 1fr; }
    .sa-catalog__title { font-size: 1.5rem; }
    .sa-course__title { font-size: 1.3rem; }
    .sa-course__hero { height: 240px; }
    .sa-course__hero-overlay { padding: 1.5rem; }
    .sa-course__hero-meta { font-size: 0.8rem; gap: 0.75rem; }
    .sa-lesson__title { font-size: 1.2rem; }
    .sa-lesson__actions { flex-direction: column; align-items: stretch; }
    .sa-lesson__nav { justify-content: space-between; }
    .sa-dashboard__grid { grid-template-columns: 1fr; }
}