/* ==========================================================================
   Academy Styles (courses.html & course-room.html)
   ========================================================================== */

/* 1. Filter Buttons */
.academy-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-pill);
    font-family: var(--font-ar);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-light);
    color: white;
    box-shadow: 0 0 20px rgba(79, 70, 229, 0.3);
}

/* 2. Academy Hero & Course Cards */
.academy-showcase {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.academy-showcase__card {
    background: linear-gradient(145deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 22px;
    padding: 1.2rem;
    backdrop-filter: blur(14px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}

.academy-showcase__icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(79,70,229,0.25), rgba(16,185,129,0.16));
    color: #E0E7FF;
    margin-bottom: 0.75rem;
}

.academy-showcase__card h3 {
    color: white;
    margin-bottom: 0.45rem;
    font-size: 1.05rem;
}

.academy-showcase__card p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.academy-journey {
    background: linear-gradient(135deg, rgba(15,23,42,0.9), rgba(17,24,39,0.78));
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 24px;
    padding: 1.4rem;
    margin-bottom: 2rem;
}

.academy-journey__header {
    margin-bottom: 1rem;
}

.academy-journey__header h2 {
    margin: 0.4rem 0 0;
    font-size: 1.35rem;
    color: white;
}

.academy-journey__steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.academy-step {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 18px;
    padding: 1rem;
}

.academy-step span {
    display: inline-flex;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 700;
    margin-bottom: 0.65rem;
}

.academy-step h4 {
    color: white;
    margin: 0 0 0.35rem;
    font-size: 1rem;
}

.academy-step p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.65;
    font-size: 0.92rem;
}

.academy-hero {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 2rem;
    align-items: center;
    padding: 2rem;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(17, 24, 39, 0.8));
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    margin-bottom: 2rem;
    overflow: hidden;
    position: relative;
}

.academy-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.28), transparent 42%);
    pointer-events: none;
}

.academy-hero__content {
    position: relative;
    z-index: 1;
}

.academy-hero__pill {
    display: inline-flex;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-pill);
    background: rgba(147, 51, 234, 0.16);
    color: #E9D5FF;
    border: 1px solid rgba(147, 51, 234, 0.32);
    font-weight: 700;
    margin-bottom: 1rem;
}

.academy-hero__content h1 {
    margin-bottom: 1rem;
    font-size: clamp(2rem, 4vw, 3.15rem);
    line-height: 1.2;
}

.academy-hero__content .body-large {
    max-width: 610px;
    margin: 0 0 1.25rem;
    color: var(--text-secondary);
}

.academy-hero__actions {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.academy-hero__quick-link {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
}

.academy-hero__metrics {
    display: grid;
    gap: 0.8rem;
}

.academy-metric-card {
    padding: 1rem 1.15rem;
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(8px);
}

.academy-metric-card strong {
    display: block;
    font-size: 1.15rem;
    color: white;
    margin-bottom: 0.25rem;
}

.academy-metric-card span {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.course-card {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease, opacity 0.3s ease;
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    min-height: 100%;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
}

.course-card__media { 
    border-radius: 24px;
    position: relative;
    height: 210px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(79,70,229,0.2), rgba(16,185,129,0.14));
}

.course-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.course-card:hover .course-card__media img {
    transform: scale(1.04);
}

.course-card__badge,
.course-card__pill {
    position: absolute;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    font-weight: 700;
    backdrop-filter: blur(10px);
    color: white;
    z-index: 2;
}

.course-card__badge {
    top: 1rem;
    right: 1rem;
}

.course-card__badge--paid {
    background: rgba(245, 158, 11, 0.82);
}

.course-card__badge--free {
    background: rgba(16, 185, 129, 0.82);
}

.course-card__pill {
    left: 1rem;
    bottom: 1rem;
    background: rgba(2, 6, 23, 0.72);
}

.course-card__pill--live {
    color: #A7F3D0;
}

.course-card__content {
    padding: 1.25rem 1.25rem 1.3rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
}

.course-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.course-card__title {
    margin: 0;
    font-size: 1.22rem;
    color: white;
    line-height: 1.4;
}

.course-card__description {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    flex: 1;
}

.course-card__actions {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 0.5rem;
}

.course-card__actions .btn {
    width: 100%;
    justify-content: center;
    padding: 0.7rem 1rem;
}

.course-card__actions .btn-secondary {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text-secondary);
}

.course-card__actions .btn-secondary:hover {
    background: rgba(255,255,255,0.05);
    color: white;
}

.course-card.hidden {
    display: none;
}

.course-modal-shell {
    display: flex;
    flex-direction: column;
}

.modal-hero {
    position: relative;
    min-height: 240px;
    display: flex;
    align-items: flex-end;
    padding: 2rem;
    overflow: hidden;
}

.modal-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(79,70,229,0.85), rgba(3,4,11,0.55));
    z-index: 1;
}

.modal-hero__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
}

.modal-hero__content {
    position: relative;
    z-index: 2;
    color: white;
}

.modal-hero__content h2 {
    margin: 0.35rem 0 0.45rem;
    font-size: 1.8rem;
}

.modal-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.18);
    border: 1px solid rgba(255,255,255,0.2);
    font-size: 0.8rem;
}

.modal-cta-stack {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-top: 1.2rem;
}

.modal-cta-stack .btn {
    flex: 1;
    min-width: 180px;
    justify-content: center;
}

@media (max-width: 900px) {
    .academy-hero {
        grid-template-columns: 1fr;
        padding: 1.45rem;
    }

    .academy-hero__metrics {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .academy-showcase,
    .academy-journey__steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .academy-hero__metrics {
        grid-template-columns: 1fr;
    }

    .course-card__actions {
        flex-direction: column;
    }

    .modal-cta-stack {
        flex-direction: column;
    }

    .academy-journey,
    .academy-showcase__card {
        padding: 1rem;
    }
}

/* 3. Interactive Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 4, 11, 0.85); /* Deep OLED black with opacity */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    padding: 1rem;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 0; /* Content handles its own padding */
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.close-modal {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem; /* Arabic RTL */
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.2s ease;
}

.close-modal:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* Modal Inner Body Details */
.modal-header-visual {
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.modal-details-container {
    padding: 2.5rem;
}

.course-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 2.5rem;
}

.meta-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: var(--radius-md);
    text-align: center;
}

.meta-item i {
    font-size: 1.5rem;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}

.meta-item span {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.meta-item strong {
    display: block;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

/* ==========================================================================
   Phase 4: Smart Teaching Room Enterprise UI
   ========================================================================== */

/* Design Tokens for Room */
:root {
    --room-bg: var(--bg-base);
    --room-surface: var(--bg-surface);
    --room-surface-hover: rgba(255, 255, 255, 0.05);
    --room-border: rgba(255, 255, 255, 0.05);
    --room-text: var(--text-primary);
    --room-text-muted: var(--text-secondary);
    --room-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout Constants */
    --header-height: 60px;
    --panel-width: 350px;
}

/* 4. Room Application Layout (CSS Grid) */
.room-app {
    display: grid;
    grid-template-rows: var(--header-height) 1fr;
    height: 100vh;
    width: 100vw;
    background: var(--room-bg);
    color: var(--room-text);
    overflow: hidden;
    font-family: var(--font-ar);
}

/* Global Header */
.room-header {
    grid-row: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1.5rem;
    background: var(--room-surface);
    border-bottom: 1px solid var(--room-border);
    z-index: 50;
}

/* Main Workspace Grid */
.room-workspace {
    grid-row: 2;
    display: grid;
    /* Desktop: 3 Columns. Left (Curriculum), Center (Teaching Area + Bottom), Right (Chat) */
    grid-template-columns: var(--panel-width) 1fr var(--panel-width);
    height: 100%;
    overflow: hidden;
    transition: var(--room-transition);
}

/* Toggled States for Desktop */
.room-workspace.hide-curriculum {
    grid-template-columns: 0 1fr var(--panel-width);
}
.room-workspace.hide-chat {
    grid-template-columns: var(--panel-width) 1fr 0;
}
.room-workspace.hide-all {
    grid-template-columns: 0 1fr 0;
}

/* Side Panels */
.room-panel {
    background: var(--room-surface);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.panel-curriculum {
    border-left: 1px solid var(--room-border); /* RTL */
}
.panel-chat {
    border-right: 1px solid var(--room-border); /* RTL */
}

/* Center Area: Teaching */
.room-center {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
    background: #000;
}

/* Teaching Renderer */
.teaching-renderer {
    width: 100%;
    flex: 1;
    position: relative;
    background: #000;
    overflow: hidden;
    /* Hardware acceleration */
    transform: translateZ(0);
}

/* Unified Renderer Layers */
.renderer-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}
.renderer-layer.active {
    opacity: 1;
    visibility: visible;
}

.renderer-layer video,
.renderer-layer img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Bottom Workspace */
.bottom-workspace {
    background: var(--room-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-top: 1px solid var(--room-border);
}

/* Responsive Adaptive Layout */
@media (max-width: 1024px) {
    .room-workspace {
        /* Tablet/Mobile: 1 Column */
        grid-template-columns: 1fr !important;
    }

    /* Off-canvas Panels */
    .room-panel {
        position: fixed;
        top: var(--header-height);
        height: calc(100vh - var(--header-height));
        width: 100%;
        max-width: 400px;
        z-index: 100;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 0 40px rgba(0,0,0,0.8);
    }

    .panel-curriculum {
        right: 0; /* RTL start */
        transform: translateX(100%);
    }
    .panel-curriculum.active-mobile {
        transform: translateX(0);
    }

    .panel-chat {
        left: 0; /* RTL end */
        transform: translateX(-100%);
    }
    .panel-chat.active-mobile {
        transform: translateX(0);
    }

    /* Mobile Bottom Sheet conversion */
    .bottom-workspace {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 80vh;
        z-index: 90;
        border-radius: 20px 20px 0 0;
        transform: translateY(100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 -10px 40px rgba(0,0,0,0.6);
    }
    .bottom-workspace.active-mobile {
        transform: translateY(0);
    }
    
    .room-center {
        /* When bottom sheet is active, push layout up or let it overlay. 
           Mobile usually overlays. */
        grid-template-rows: auto 1fr;
    }
}

/* Utility Animations */
.animate-fade {
    animation: simpleFade 0.2s ease forwards;
}
@keyframes simpleFade {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Scrollbars */
.scrollable {
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) transparent;
}
.scrollable::-webkit-scrollbar {
    width: 6px;
}
.scrollable::-webkit-scrollbar-thumb {
    background-color: var(--primary-color);
    border-radius: 10px;
}

/* 5. Enrollment & Payment Styles */
.enrollment-step {
    display: none;
    animation: fadeIn 0.3s ease;
}

.enrollment-step.active-step {
    display: block;
}

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

.modal-header-simple {
    text-align: center;
    padding: 2rem 1.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.form-container {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-ar);
    transition: border-color 0.3s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.05);
}

/* Payment Bottom Sheet Specifics */
.bottom-sheet {
    max-width: 500px !important;
    border-radius: 20px 20px 0 0 !important;
    margin-top: auto;
    transform: translateY(100%);
    background: var(--bg-surface);
    border: 1px solid rgba(255,255,255,0.05);
    border-bottom: none;
}

.modal-overlay.active .bottom-sheet {
    transform: translateY(0);
}

.payment-bottom-sheet {
    padding: 2.5rem 1.5rem;
}

.payment-title {
    text-align: right;
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
}

.payment-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
}

.payment-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.bank-details-label {
    font-weight: 500;
    color: var(--text-primary);
}

.change-bank-btn {
    background: none;
    border: none;
    color: var(--primary-light);
    cursor: pointer;
    font-family: var(--font-ar);
    font-size: 0.85rem;
}

.bank-info p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.bank-info strong {
    color: white;
}

.account-number-box {
    display: flex;
    align-items: center;
    margin-top: 1rem;
}

.account-label {
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

.account-number {
    font-size: 1.2rem;
    font-weight: bold;
    letter-spacing: 1px;
    margin-left: auto; /* push to right in RTL */
    direction: ltr; /* keep numbers LTR */
}

.copy-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.2rem;
    cursor: pointer;
    margin-right: 1rem;
}

.payment-warning {
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 1rem;
    text-align: center;
}

.upload-receipt-card {
    background: rgba(255,255,255,0.01);
    border: 2px dashed rgba(255,255,255,0.15);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-receipt-card:hover {
    border-color: var(--primary-light);
    background: rgba(79, 70, 229, 0.05);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
}

.upload-plus-icon {
    position: absolute;
    font-size: 0.8rem;
    color: var(--primary-light);
    transform: translate(-15px, 15px);
    background: var(--bg-surface);
    border-radius: 50%;
    padding: 2px;
}

/* ==========================================================================
   Phase 3: Registration Modals & States
   ========================================================================== */
   
.form-input.is-invalid {
    border-color: var(--danger-color) !important;
    background-color: rgba(239, 68, 68, 0.05);
}

.form-input.is-valid {
    border-color: #10b981 !important;
}

.sheet-drag-handle {
    width: 40px;
    height: 5px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    margin: 1rem auto;
    cursor: grab;
    touch-action: none;
}
.sheet-drag-handle:active {
    cursor: grabbing;
}

#registration-bottom-sheet {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.enrollment-step {
    display: none;
    animation: fadeInStep 0.3s ease-in-out;
}
.enrollment-step.active-step {
    display: block;
}

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

/* Skeleton Loaders */
.skeleton-loader {
    animation: skeleton-pulse 1.5s infinite ease-in-out;
    background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 75%);
    background-size: 200% 100%;
    color: transparent !important;
    border-radius: 4px;
}
@keyframes skeleton-pulse {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Fallback Logo for missing cover image */
.fallback-cover-logo {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 41, 59, 0.9));
  font-size: 3rem;
  font-family: var(--font-en, 'Outfit', sans-serif);
  font-weight: 800;
  letter-spacing: -2px;
  z-index: 1;
}

.fallback-cover-logo span:first-child {
  color: var(--primary-light, #A5B4FC);
}

.fallback-cover-logo span:last-child {
  color: #ffffff;
}