/**
 * UNILIS Learning - public course pages.
 *
 * Palette and glass treatment match the Live Engagement module so the public
 * side reads as the same product. Everything here is scoped with an ln- prefix
 * because these pages sit outside any existing stylesheet's namespace.
 */

:root {
    --ln-green: #1B5E20;
    --ln-green-mid: #2E7D32;
    --ln-green-light: #43A047;
    --ln-amber: #F9A825;
    --ln-accent: #EF6C00;
    --ln-success: #16A34A;
    --ln-warning: #F59E0B;
    --ln-danger: #DC2626;
    --ln-info: #2563EB;

    --ln-ink: #10231a;
    --ln-body: #374151;
    --ln-muted: #6b7280;
    --ln-line: #e5e7eb;
    --ln-surface: #ffffff;
    --ln-bg: #f6f8f6;

    --ln-glass: rgba(255, 255, 255, 0.72);
    --ln-glass-line: rgba(255, 255, 255, 0.5);
    --ln-shadow: 0 8px 32px rgba(27, 94, 32, 0.10);
    --ln-shadow-lift: 0 16px 44px rgba(27, 94, 32, 0.18);

    --ln-r-sm: 10px;
    --ln-r: 14px;
    --ln-r-lg: 20px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--ln-body);
    background:
        radial-gradient(900px 420px at 8% -8%, rgba(27, 94, 32, .10), transparent 60%),
        radial-gradient(800px 400px at 104% 4%, rgba(249, 168, 37, .12), transparent 58%),
        var(--ln-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--ln-green-mid); }

/* ── Header ───────────────────────────────────────────────────────────── */

.ln-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    padding: 14px 28px;
    background: var(--ln-glass);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--ln-glass-line);
}

.ln-brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ln-green);
    text-decoration: none;
}
.ln-brand strong { font-weight: 800; }
.ln-brand .material-symbols-rounded { font-size: 26px; color: var(--ln-amber); }

.ln-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.ln-nav > a:not(.ln-btn) {
    padding: 8px 12px;
    border-radius: var(--ln-r-sm);
    color: var(--ln-body);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
}
.ln-nav > a:not(.ln-btn):hover { background: rgba(27, 94, 32, .07); color: var(--ln-green); }

.ln-who {
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(27, 94, 32, .09);
    color: var(--ln-green);
    font-size: 0.85rem;
    font-weight: 600;
}

/* ── Layout ───────────────────────────────────────────────────────────── */

.ln-main {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 34px 24px 60px;
}
.ln-main-narrow { max-width: 520px; }

.ln-footer {
    padding: 24px;
    text-align: center;
    font-size: 0.84rem;
    color: var(--ln-muted);
    border-top: 1px solid var(--ln-line);
    background: rgba(255, 255, 255, .55);
}
.ln-footer p { margin: 3px 0; }

/* ── Buttons ──────────────────────────────────────────────────────────── */

.ln-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: 1px solid transparent;
    border-radius: var(--ln-r-sm);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.ln-btn:active { transform: translateY(1px); }

.ln-btn-primary {
    background: linear-gradient(135deg, var(--ln-green) 0%, var(--ln-green-light) 100%);
    color: #fff;
    box-shadow: 0 6px 18px rgba(27, 94, 32, .28);
}
.ln-btn-primary:hover { box-shadow: var(--ln-shadow-lift); transform: translateY(-1px); }

.ln-btn-amber {
    background: linear-gradient(135deg, var(--ln-amber) 0%, var(--ln-accent) 100%);
    color: #21160a;
    box-shadow: 0 6px 18px rgba(249, 168, 37, .3);
}
.ln-btn-amber:hover { transform: translateY(-1px); }

.ln-btn-ghost {
    background: transparent;
    border-color: rgba(27, 94, 32, .3);
    color: var(--ln-green);
}
.ln-btn-ghost:hover { background: rgba(27, 94, 32, .07); }

.ln-btn-block { width: 100%; }
.ln-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }

/* ── Cards & forms ────────────────────────────────────────────────────── */

.ln-card {
    background: var(--ln-surface);
    border: 1px solid var(--ln-line);
    border-radius: var(--ln-r-lg);
    box-shadow: var(--ln-shadow);
    padding: 30px;
}

.ln-card h1 { margin: 0 0 6px; font-size: 1.5rem; color: var(--ln-ink); font-weight: 700; }
.ln-card .ln-sub { margin: 0 0 22px; color: var(--ln-muted); font-size: 0.92rem; }

.ln-field { margin-bottom: 15px; }
.ln-field label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ln-ink);
}
.ln-field input, .ln-field select, .ln-field textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--ln-line);
    border-radius: var(--ln-r-sm);
    font: inherit;
    font-size: 0.93rem;
    background: #fff;
    color: var(--ln-ink);
    transition: border-color .15s ease, box-shadow .15s ease;
}
.ln-field input:focus, .ln-field select:focus, .ln-field textarea:focus {
    outline: none;
    border-color: var(--ln-green-light);
    box-shadow: 0 0 0 3px rgba(67, 160, 71, .18);
}
.ln-hint { margin: 5px 0 0; font-size: 0.79rem; color: var(--ln-muted); }
.ln-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.ln-alt {
    margin: 20px 0 0;
    padding-top: 18px;
    border-top: 1px solid var(--ln-line);
    text-align: center;
    font-size: 0.88rem;
    color: var(--ln-muted);
}

/* ── Alerts ───────────────────────────────────────────────────────────── */

.ln-alert {
    display: flex;
    gap: 11px;
    align-items: flex-start;
    margin-bottom: 20px;
    padding: 13px 16px;
    border-radius: var(--ln-r);
    font-size: 0.89rem;
    line-height: 1.55;
}
.ln-alert .material-symbols-rounded { font-size: 21px; flex-shrink: 0; }
.ln-alert ul { margin: 0; padding-left: 18px; }
.ln-alert-error   { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.ln-alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.ln-alert-info    { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* ── Catalogue ────────────────────────────────────────────────────────── */

.ln-hero { margin-bottom: 32px; }
.ln-hero h1 {
    margin: 0 0 10px;
    font-size: clamp(1.7rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--ln-ink);
    letter-spacing: -0.02em;
}
.ln-hero p { margin: 0; max-width: 62ch; color: var(--ln-muted); font-size: 1rem; line-height: 1.65; }
.ln-course-banner { height: clamp(180px, 30vw, 340px); margin: 0 0 24px; overflow: hidden; border-radius: var(--ln-r-lg); background: var(--ln-surface); box-shadow: var(--ln-shadow); }
.ln-course-banner img { display: block; width: 100%; height: 100%; object-fit: cover; }
.ln-course-intro { margin-top: 0; }
.ln-sponsor { display: flex; align-items: center; gap: 14px; margin: -10px 0 28px; padding: 14px 18px; border: 1px solid var(--ln-line); border-radius: var(--ln-r); background: var(--ln-surface); color: var(--ln-ink); }
.ln-sponsor img { width: 54px; height: 54px; object-fit: contain; flex: 0 0 auto; }
.ln-sponsor strong { font-size: .9rem; }
.ln-sponsor p { margin: 4px 0 0; color: var(--ln-muted); font-size: .85rem; line-height: 1.45; }

.ln-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    width: 100%;
}
.ln-course-shell {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--ln-surface);
    border: 1px solid var(--ln-line);
    border-radius: var(--ln-r-lg);
    overflow: hidden;
    box-shadow: var(--ln-shadow);
    transition: transform .18s ease, box-shadow .18s ease;
}
.ln-course-shell:hover { transform: translateY(-3px); box-shadow: var(--ln-shadow-lift); }

.ln-course {
    display: flex;
    flex-direction: column;
    flex: 1 0 auto;
    text-decoration: none;
    color: inherit;
}

/* Two lines of breathing room below the banner, before the details. */
.ln-course-space { height: 2rem; flex: 0 0 auto; }

.ln-sponsored-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    margin-top: auto;
    padding: 11px 14px;
    border: 0;
    border-top: 1px solid rgba(146, 98, 10, .35);
    background: #92620a;
    color: #fff;
    font: inherit;
    font-size: .8rem;
    font-weight: 700;
    cursor: pointer;
}
.ln-sponsored-btn:hover { background: #7a5208; }
.ln-sponsored-btn .material-symbols-rounded { font-size: 17px; }
.ln-sponsored-btn:focus-visible { outline: 3px solid #fcd34d; outline-offset: -3px; }

.ln-course-bar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    margin-top: auto;
    padding: 11px 14px;
    font: inherit;
    font-size: .8rem;
    font-weight: 700;
}
.ln-course-bar .material-symbols-rounded { font-size: 17px; }
.ln-course-bar-paid { background: #3f3f46; color: #fff; border-top: 1px solid rgba(63, 63, 70, .35); }
.ln-course-bar-free { background: var(--ln-green); color: #fff; border-top: 1px solid rgba(27, 94, 32, .3); }
.ln-sponsor-modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 20px; background: rgba(15, 23, 42, .58); }
.ln-sponsor-modal[hidden] { display: none; }
.ln-sponsor-modal-panel { position: relative; width: min(100%, 460px); padding: 34px 30px 30px; border-radius: var(--ln-r-lg); background: var(--ln-surface); box-shadow: var(--ln-shadow-lift); }
.ln-sponsor-modal-close { position: absolute; top: 12px; right: 12px; display: grid; place-items: center; width: 34px; height: 34px; border: 0; border-radius: 50%; background: transparent; color: var(--ln-muted); cursor: pointer; }
.ln-sponsor-modal-close:hover { background: rgba(27, 94, 32, .08); color: var(--ln-ink); }
.ln-sponsor-modal-logo { display: block; max-width: 160px; max-height: 84px; margin: 0 0 18px; object-fit: contain; }
.ln-sponsor-modal-label { margin: 0 0 5px; color: var(--ln-green); font-size: .76rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.ln-sponsor-modal h2 { margin: 0 0 10px; color: var(--ln-ink); font-size: 1.3rem; }
.ln-sponsor-modal #sponsorModalDetails { margin: 0; color: var(--ln-muted); line-height: 1.6; white-space: pre-line; }

.ln-course-cover {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 152px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--ln-green) 0%, var(--ln-green-light) 100%);
    color: rgba(255, 255, 255, .82);
}
.ln-course-cover .material-symbols-rounded { font-size: 46px; }
.ln-course-cover img {
    display: block;
    width: 100%;
    height: auto;
}

.ln-course-body { flex: 1; display: flex; flex-direction: column; padding: 18px; }
.ln-course-body h3 { margin: 0 0 7px; font-size: 1.04rem; color: var(--ln-ink); font-weight: 700; line-height: 1.35; }
.ln-course-body p { flex: 1; margin: 0 0 14px; font-size: 0.87rem; color: var(--ln-muted); line-height: 1.55; }

.ln-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ln-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(27, 94, 32, .08);
    color: var(--ln-green);
    font-size: 0.74rem;
    font-weight: 600;
}
.ln-chip .material-symbols-rounded { font-size: 15px; }
.ln-chip-amber { background: rgba(249, 168, 37, .18); color: #92620a; }
.ln-chip-done  { background: rgba(22, 163, 74, .13); color: #15803d; }

/* ── Progress ─────────────────────────────────────────────────────────── */

.ln-bar {
    height: 7px;
    border-radius: 999px;
    background: rgba(27, 94, 32, .12);
    overflow: hidden;
    margin: 12px 0 8px;
}
.ln-bar-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--ln-green) 0%, var(--ln-green-light) 100%);
    transition: width .6s cubic-bezier(.22, .61, .36, 1);
}

.ln-empty {
    padding: 56px 24px;
    text-align: center;
    color: var(--ln-muted);
    background: var(--ln-surface);
    border: 1px dashed var(--ln-line);
    border-radius: var(--ln-r-lg);
}
.ln-empty .material-symbols-rounded { font-size: 46px; opacity: .4; display: block; margin: 0 auto 10px; }
.ln-empty h2 { margin: 0 0 6px; font-size: 1.1rem; color: var(--ln-ink); }
.ln-empty p { margin: 0; font-size: 0.9rem; }

/* ── Lesson schedule (dashboard) ─────────────────────────────────────── */

.ln-card-head {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--ln-line);
}
.ln-card-head .material-symbols-rounded {
    font-size: 24px;
    color: var(--ln-green-mid);
    flex-shrink: 0;
}
.ln-card-head .material-symbols-rounded + div { min-width: 0; }

.ln-schedule-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}
.ln-schedule-item + .ln-schedule-item {
    border-top: 1px solid var(--ln-line);
}
.ln-schedule-item:hover { background: rgba(27, 94, 32, .045); }

@media (max-width: 900px) {
    .ln-schedule-grid { grid-template-columns: 1fr; }
}

@media (max-width: 980px) {
    .ln-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .ln-header { padding: 12px 16px; }
    .ln-main { padding: 22px 16px 48px; }
    .ln-grid { grid-template-columns: 1fr; }
    .ln-card { padding: 22px; }
    .ln-row { grid-template-columns: 1fr; }
    .ln-nav > a:not(.ln-btn) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .ln-course, .ln-btn, .ln-bar-fill { transition: none; }
}

/* ── Content Block Styles ─────────────────────────────────────────────────── */

.ln-content-text {
    margin-bottom: 20px;
}

.ln-content-image,
.ln-content-diagram {
    margin: 20px 0;
    text-align: center;
}

.ln-content-image img,
.ln-content-diagram img {
    border-radius: var(--ln-r-sm);
    box-shadow: var(--ln-shadow);
    max-width: 100%;
    height: auto;
}

.ln-caption {
    font-size: 0.85rem;
    color: var(--ln-muted);
    margin: 8px 0 0 0;
    font-style: italic;
}

.ln-content-video {
    margin: 24px 0;
}

.ln-content-audio {
    margin: 20px 0;
}

.ln-content-pdf,
.ln-content-ppt {
    margin: 24px 0;
    border: 1px solid var(--ln-line);
    border-radius: var(--ln-r);
    padding: 20px;
    background: var(--ln-surface);
}

.ln-pdf-header,
.ln-ppt-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 1.1rem;
    color: var(--ln-ink);
}

.ln-pdf-header .material-symbols-rounded,
.ln-ppt-header .material-symbols-rounded {
    color: var(--ln-accent);
    font-size: 24px;
}