/* ===========================================
   Course Overview (Student)
   =========================================== */

.course-overview-body .main-header,
.course-overview-body .site-footer {
    display: none;
}

.course-overview-body main {
    padding-top: 0;
}

.course-overview {
    background: var(--bg-light);
    padding-bottom: 80px;
    direction: rtl;
    text-align: right;
}

.course-hero {
    position: relative;
    background: var(--dark-gradient);
    padding: 28px 0 22px;
    overflow: hidden;
    color: #ffffff;
    box-shadow: 0 25px 60px rgba(2, 6, 23, 0.35);
}

.bubbles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.bubble {
    position: absolute;
    bottom: -120px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,0.18);
    animation: floatUp 16s infinite ease-in-out;
}

.bubble:nth-child(1) { left: 10%; width: 80px; height: 80px; animation-delay: 0s; animation-duration: 18s; }
.bubble:nth-child(2) { left: 20%; width: 40px; height: 40px; animation-delay: 2s; animation-duration: 15s; }
.bubble:nth-child(3) { left: 35%; width: 100px; height: 100px; animation-delay: 4s; animation-duration: 20s; }
.bubble:nth-child(4) { left: 50%; width: 60px; height: 60px; animation-delay: 1s; animation-duration: 16s; }
.bubble:nth-child(5) { left: 65%; width: 90px; height: 90px; animation-delay: 3s; animation-duration: 17s; }
.bubble:nth-child(6) { left: 80%; width: 50px; height: 50px; animation-delay: 5s; animation-duration: 14s; }
.bubble:nth-child(7) { left: 90%; width: 70px; height: 70px; animation-delay: 2.5s; animation-duration: 19s; }
.bubble:nth-child(8) { left: 5%; width: 55px; height: 55px; animation-delay: 6s; animation-duration: 16s; }

@keyframes floatUp {
    0% { transform: translateY(0) rotate(0deg); opacity: 0; }
    10% { opacity: 0.8; }
    90% { opacity: 0.8; }
    100% { transform: translateY(-120vh) rotate(720deg); opacity: 0; }
}

.course-hero .hero-content {
    position: relative;
    z-index: 2;
}

.hero-card {
    display: grid;
    gap: 14px;
    padding: 16px 18px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 22px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(16px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.2);
    animation: fade-in-up 0.6s ease-out;
}

.hero-compact {
    max-width: var(--container-xl);
    margin-inline: auto;
}

.hero-top {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
}

.back-btn {
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-decoration: none;
}

.hero-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    margin: 0;
    color: #ffffff;
    font-weight: 900;
    font-family: var(--font-secondary);
    text-align: center;
    text-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.hero-top-spacer {
    display: block;
}

.hero-motivation {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 8px 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 600;
    font-size: 0.9rem;
}

.hero-motivation p {
    margin: 0;
}

.promo-sidebar-card {
    display: grid;
    gap: 12px;
}

.promo-mini-card {
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 14px;
    overflow: hidden;
    background: #f8fafc;
}

.promo-mini-media {
    position: relative;
    height: 132px;
    background: #0f172a;
}

.promo-mini-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.promo-mini-play {
    position: absolute;
    inset-inline-start: 10px;
    inset-block-end: 10px;
    width: 38px;
    height: 38px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 800;
    box-shadow: 0 10px 22px rgba(2, 6, 23, 0.3);
}

.promo-mini-body {
    display: grid;
    gap: 2px;
    padding: 10px 12px;
}

.promo-mini-body strong {
    color: #0f172a;
    font-size: 0.96rem;
}

.promo-mini-body span {
    color: #64748b;
    font-size: 0.8rem;
}

.promo-mini-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.promo-mini-edit-btn {
    cursor: pointer;
}

.promo-settings-modal {
    position: fixed;
    inset: 0;
    z-index: 12000;
    display: grid;
    place-items: center;
    padding: 16px;
}

.promo-settings-modal[hidden] {
    display: none !important;
}

.promo-settings-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.55);
}

.promo-settings-dialog {
    position: relative;
    z-index: 1;
    width: min(760px, 100%);
    max-height: min(90vh, 900px);
    overflow: auto;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.3);
    background: #ffffff;
    box-shadow: 0 30px 80px rgba(2, 6, 23, 0.35);
    padding: 16px;
    display: grid;
    gap: 12px;
}

.promo-settings-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.promo-settings-head h3 {
    margin: 0;
    font-size: 1.05rem;
    color: #0f172a;
}

.promo-settings-close {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    border: 1px solid rgba(148, 163, 184, 0.28);
    background: #f8fafc;
    color: #0f172a;
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
}

.promo-settings-form {
    display: grid;
    gap: 12px;
}

.promo-settings-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.promo-settings-field {
    display: grid;
    gap: 6px;
}

.promo-settings-field label {
    font-size: 0.82rem;
    color: #334155;
    font-weight: 700;
}

.promo-settings-field input,
.promo-settings-field select {
    width: 100%;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: #f8fafc;
    border-radius: 10px;
    min-height: 40px;
    padding: 8px 10px;
    color: #0f172a;
    font-family: inherit;
}

.promo-icon-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.promo-icon-preset {
    border: 1px solid rgba(59, 130, 246, 0.28);
    background: #f1f5f9;
    color: #0f172a;
    border-radius: 10px;
    min-width: 36px;
    height: 34px;
    padding: 0 8px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.promo-icon-preset:hover,
.promo-icon-preset:focus-visible {
    transform: translateY(-1px);
    border-color: rgba(37, 99, 235, 0.48);
    background: #e2e8f0;
    outline: none;
}

.promo-settings-actions-inline {
    display: flex;
    margin-top: 4px;
}

.promo-settings-note {
    margin: 0;
    color: #64748b;
    font-size: 0.8rem;
}

.promo-settings-foot {
    display: grid;
    gap: 8px;
}

.promo-settings-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

body.is-modal-open {
    overflow: hidden;
}

.motivation-icon {
    width: 28px;
    height: 28px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.2);
}

.hero-mini-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
}

.mini-card {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 14px;
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
}

.mini-card .card-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

.mini-card .card-value {
    font-size: 1rem;
    font-weight: 700;
    color: #ffffff;
}

.mini-card .card-meta {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

.mini-progress {
    position: relative;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    overflow: hidden;
    width: 100%;
    margin: 6px 0;
}

.mini-progress .progress-bar {
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    border-radius: inherit;
}

.progress-card {
    display: grid;
    gap: 4px;
    align-items: stretch;
    grid-column: span 2;
}

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

.teacher-mini img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.stat-card .stat-icon {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.2);
    font-size: 1rem;
}

.overview-content {
    margin-top: 8px;
}

.overview-grid {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    align-content: start;
    grid-auto-rows: min-content;
    direction: ltr;
}

.overview-main,
.overview-aside {
    direction: rtl;
}

.overview-main {
    grid-column: 2;
    grid-row: 1;
}

.overview-aside {
    grid-column: 1;
    grid-row: 1;
    align-self: start;
    position: static;
}

.section-head {
    margin-bottom: 18px;
}

.section-head h2 {
    margin: 0 0 6px;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.section-head p {
    color: var(--text-secondary);
    margin: 0;
}

.units-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 300px));
    gap: 16px;
    justify-content: start;
}

.unit-card {
    background: #ffffff;
    border-radius: 22px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: stretch;
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.1);
    aspect-ratio: 1 / 1;
    max-width: 300px;
    width: 100%;
    position: relative;
}

.unit-card.locked {
    opacity: 0.7;
    border-style: dashed;
    background: #f8fafc;
}

.unit-icon {
    width: 50px;
    height: 50px;
    border-radius: 16px;
    background: rgba(47, 91, 255, 0.12);
    display: grid;
    place-items: center;
    font-size: 1.4rem;
}

.unit-card h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.unit-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    width: 100%;
}

.unit-stat {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    border-radius: 12px;
    background: #f8fafc;
    border: 1px solid rgba(148, 163, 184, 0.18);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.unit-stat .stat-icon {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: rgba(47, 91, 255, 0.12);
    font-size: 0.95rem;
}

.unit-stat .stat-label {
    font-size: 0.75rem;
}

.unit-stat strong {
    color: var(--text-primary);
    font-weight: 700;
}

.unit-progress {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.unit-progress .progress-track {
    flex: 1;
    height: 6px;
    position: relative;
    background: #e2e8f0;
    border-radius: 999px;
    overflow: hidden;
}

.unit-progress .progress-bar {
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    border-radius: inherit;
}

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

.unit-actions {
    margin-top: auto;
    width: 100%;
    display: flex;
    justify-content: flex-end;
}

.unit-actions .btn-primary {
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 0.85rem;
    color: #fff;
    background: var(--primary-gradient);
}

.locked-label {
    font-size: 0.85rem;
    color: #64748b;
}

.unit-status {
    position: absolute;
    top: 12px;
    left: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    color: #ffffff;
    font-size: 0.72rem;
}

.unit-status.available {
    background: rgba(16, 185, 129, 0.95);
}

.unit-status.locked {
    background: rgba(15, 23, 42, 0.9);
}

.unit-number {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.12);
    color: #1e1b4b;
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

.overview-aside {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.sidebar-card {
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    padding: 16px;
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.08);
}

.sidebar-card h3 {
    margin: 0 0 12px;
    font-size: 1rem;
}

.sidebar-list {
    display: grid;
    gap: 10px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: #f8fafc;
    border-radius: 12px;
    padding: 10px;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.sidebar-item .item-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.sidebar-item .item-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.item-action {
    font-size: 0.75rem;
    padding: 6px 10px;
    border-radius: 10px;
    background: #fff;
    border: 1px solid rgba(148, 163, 184, 0.2);
    text-decoration: none;
    color: var(--text-primary);
}

.item-action--primary {
    background: var(--primary-gradient);
    color: #ffffff;
    border-color: transparent;
    }

    /* ===========================================
       GUEST LOCKED FEATURE BLOCK
       =========================================== */
    .guest-locked-feature {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px 16px;
        gap: 10px;
        background: #f8fafc;
        border-radius: 12px;
        border: 1px dashed #cbd5e1;
    }

    .locked-feature-icon {
        font-size: 2rem;
        opacity: 0.7;
    }

    .guest-locked-feature p {
        font-size: 0.88rem;
        color: #64748b;
        margin: 0;
        line-height: 1.6;
    }

    .locked-feature-btn {
        display: inline-block;
        padding: 9px 22px;
        border-radius: 8px;
        font-size: 0.88rem;
        font-weight: 700;
        text-decoration: none;
        background: linear-gradient(135deg, #6c47ff 0%, #4f35c9 100%);
        color: #fff;
        transition: transform 0.2s, box-shadow 0.2s;
    }

    .locked-feature-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 18px rgba(108, 71, 255, 0.3);
    cursor: pointer;
    font-weight: 700;
}

.item-action--wide {
    display: inline-flex;
    justify-content: center;
    width: 100%;
    font-weight: 700;
}

.item-action.muted {
    background: #f1f5f9;
    color: #94a3b8;
}

.manage-stack {
    gap: 12px;
}

.manage-form {
    display: grid;
    gap: 8px;
    background: #f8fafc;
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 12px;
    padding: 10px;
}

.manage-form-title {
    font-size: 0.82rem;
    font-weight: 800;
    color: #0f172a;
}

.manage-input,
.manage-select {
    width: 100%;
    min-height: 38px;
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: #ffffff;
    border-radius: 10px;
    padding: 8px 10px;
    font-family: inherit;
    color: #0f172a;
}

.chat-card .chat-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.chat-card img {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    object-fit: cover;
}

.empty-state {
    background: #f8fafc;
    border-radius: 14px;
    padding: 14px;
    text-align: center;
    color: var(--text-secondary);
    border: 1px dashed rgba(148, 163, 184, 0.3);
    font-size: 0.85rem;
}

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

    .overview-grid {
        grid-template-columns: 1fr;
        direction: rtl;
    }

    .overview-main,
    .overview-aside {
        grid-column: auto;
        position: static;
    }
}

@media (max-width: 640px) {
    .unit-card {
        aspect-ratio: auto;
    }

    .progress-card {
        grid-column: auto;
    }

    .hero-top {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 8px;
    }

    .hero-top-spacer {
        display: none;
    }

    .back-btn {
        justify-self: center;
    }

    .promo-settings-grid {
        grid-template-columns: 1fr;
    }
}