/* =====================================================
   COGNO SOLUTION - Module Pages Responsive Styles
   Fixes layout, text, and element overflow for all
   learning module pages across all screen sizes.
   ===================================================== */

/* =====================================================
   BASE: Ensure modules adapt to bottom nav
   ===================================================== */
body {
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px) + 16px);
}

/* =====================================================
   ACTIVITY CONTAINER — Fix 100vh overflow
   ===================================================== */
.activity-container {
    min-height: 100vh;
    min-height: 100dvh;
    /* modern viewport unit */
    height: auto !important;
    /* override height: 100vh */
    padding-bottom: 80px;
    /* space for bottom nav */
    box-sizing: border-box;
}

/* =====================================================
   ACTIVITY CONTENT — Proper centering for all screens
   ===================================================== */
.activity-content {
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

/* =====================================================
   MOBILE HEADER — Consistent display rules
   ===================================================== */
.mobile-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--color-surface, #fff);
    border-bottom: 1px solid var(--color-border, #e5e7eb);
    position: sticky;
    top: 0;
    z-index: 100;
}

.mobile-header .back-btn {
    background: var(--color-bg-secondary, #f3f4f6);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text, #1e293b);
    flex-shrink: 0;
}

.mobile-header .page-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* =====================================================
   ACTIVITY NAVBAR — Consistent mobile header
   ===================================================== */
.activity-navbar {
    display: none;
    /* hidden on desktop by default */
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-surface, #fff);
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border, #e5e7eb);
    justify-content: space-between;
    align-items: center;
}

.activity-navbar .back-btn,
.activity-navbar .action-btn {
    background: var(--color-bg-secondary, #f3f4f6);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text, #1e293b);
}

.activity-title-group {
    text-align: center;
}

.activity-category {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
}

.activity-name {
    font-size: 0.9rem;
    font-weight: 700;
    margin: 0;
}

/* =====================================================
   CANVAS — Scale properly within containers
   ===================================================== */
canvas {
    max-width: 100%;
    height: auto;
}

.canvas-wrapper {
    max-width: 100%;
    overflow: hidden;
}

.canvas-wrapper canvas {
    width: 100% !important;
    height: auto !important;
}

/* =====================================================
   ACTIVITY HEADER (Desktop) — Scale properly
   ===================================================== */
.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.activity-header h1 {
    font-size: clamp(1.25rem, 3vw, 2.5rem);
    margin: 0;
    line-height: 1.3;
}

/* =====================================================
   MODULE INDEX PAGES — Cards grid responsive
   ===================================================== */
.activities-grid {
    display: grid;
    gap: 1rem;
}

/* =====================================================
   GAME CONTENT — Center properly, avoid overflow
   ===================================================== */
.game-content {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    box-sizing: border-box;
}

/* =====================================================
   MATH PROBLEMS — Scale for all screens
   ===================================================== */
.math-problem {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    box-sizing: border-box;
}

.equation {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    text-align: center;
    justify-content: center;
}

.blocks-container {
    flex-wrap: wrap;
    justify-content: center;
}

.blocks-row {
    justify-content: center;
}

/* =====================================================
   TRACING BOX — Scale for all screens
   ===================================================== */
.tracing-box {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    box-sizing: border-box;
}

/* =====================================================
   READING CARDS — Responsive widths
   ===================================================== */
.reading-card,
.questions-card,
.feedback-card,
.settings-panel {
    width: 100%;
    box-sizing: border-box;
}

/* =====================================================
   BUTTON GROUPS — Don't break out of containers
   ===================================================== */
.button-group,
.feedback-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

/* =====================================================
   SMALL PHONES (max-width: 479px)
   ===================================================== */
@media screen and (max-width: 479px) {
    .activity-container {
        padding: 0 !important;
    }

    .activity-content {
        padding: 1rem !important;
    }

    .activity-header {
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: 1.5rem;
    }

    .activity-header h1 {
        font-size: 1.25rem;
    }

    .mobile-header {
        display: flex;
    }

    .activity-navbar {
        display: flex !important;
    }

    .topbar,
    .sidebar,
    .hide-xs {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
        padding: 0 !important;
    }

    .content-area {
        padding: 1rem !important;
    }

    /* Math/game elements */
    .math-problem {
        padding: 1.25rem !important;
    }

    .equation {
        font-size: 1.5rem !important;
        gap: 10px !important;
        margin-bottom: 1.25rem !important;
    }

    .blocks-container {
        gap: 0.75rem !important;
        flex-direction: column;
        align-items: center;
    }

    .block {
        width: 28px !important;
        height: 28px !important;
    }

    .answer-btn {
        padding: 10px 16px;
        font-size: 0.95rem;
    }

    .answer-options {
        gap: 10px;
    }

    /* Tracing */
    .tracing-box {
        padding: 1.25rem !important;
    }

    .letter-display {
        font-size: 3rem !important;
    }

    .faded-letter {
        font-size: 2.5rem !important;
    }

    /* Reading */
    .reading-text {
        font-size: 16px !important;
        line-height: 1.8 !important;
    }

    .story-info {
        flex-direction: column;
        gap: 0.5rem;
    }

    .card-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    /* Module index cards */
    .activities-grid {
        grid-template-columns: 1fr !important;
    }

    .module-header {
        padding: 1.25rem 1rem !important;
        border-radius: 1rem !important;
        text-align: center;
    }

    .module-header-content {
        flex-direction: column !important;
        gap: 1rem !important;
    }

    .module-icon-large {
        width: 56px !important;
        height: 56px !important;
        font-size: 1.5rem !important;
        margin: 0 auto;
    }

    .module-header h1 {
        font-size: 1.35rem !important;
    }

    .module-stats {
        flex-wrap: wrap;
        justify-content: center !important;
        gap: 0.5rem !important;
    }

    /* Video/webcam */
    video,
    #gameCanvas {
        height: 200px !important;
    }

    /* Instructions */
    .instruction {
        font-size: 0.8rem;
        padding: 1rem;
    }
}

/* =====================================================
   PHONES / TABLETS PORTRAIT (480px – 767px)
   ===================================================== */
@media screen and (min-width: 480px) and (max-width: 767px) {
    .activity-container {
        padding: 0;
    }

    .activity-content {
        padding: 1.25rem;
    }

    .activity-navbar {
        display: flex !important;
    }

    .topbar,
    .sidebar,
    .hide-xs {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
    }

    .content-area {
        padding: 1.25rem;
    }

    .activity-header h1 {
        font-size: 1.5rem;
    }

    .math-problem {
        padding: 1.5rem;
    }

    .equation {
        font-size: 1.75rem;
    }

    .blocks-container {
        gap: 1.5rem;
    }

    .block {
        width: 30px;
        height: 30px;
    }

    .activities-grid {
        grid-template-columns: 1fr !important;
    }

    .module-header-content {
        flex-direction: column;
        text-align: center;
    }

    .module-icon-large {
        margin: 0 auto;
    }

    .module-stats {
        justify-content: center;
    }

    video,
    #gameCanvas {
        height: 280px !important;
    }
}

/* =====================================================
   TABLETS LANDSCAPE (768px – 1023px)
   ===================================================== */
@media screen and (min-width: 768px) and (max-width: 1023px) {
    .activity-container {
        padding: 0;
    }

    .activity-content {
        padding: 1.5rem;
    }

    /* Show activity navbar on tablets */
    .activity-navbar {
        display: flex !important;
    }

    .mobile-header {
        display: flex;
    }

    .topbar,
    .sidebar {
        display: none !important;
    }

    .hide-xs {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
        padding: 1.5rem;
    }

    .content-area {
        padding: 1.5rem;
    }

    .activity-header h1 {
        font-size: 1.75rem;
    }

    .math-problem {
        padding: 2rem;
    }

    .equation {
        font-size: 2rem;
    }

    .activities-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .module-header h1 {
        font-size: 1.75rem;
    }

    video,
    #gameCanvas {
        height: 350px !important;
    }
}

/* =====================================================
   LAPTOPS (1024px – 1279px) — KEY FIX AREA
   ===================================================== */
@media screen and (min-width: 1024px) and (max-width: 1279px) {
    .activity-container {
        padding: 0;
    }

    .activity-content {
        padding: 2rem 1.5rem;
    }

    /* Show desktop header, hide mobile */
    .mobile-header {
        display: none !important;
    }

    .activity-navbar {
        display: none !important;
    }

    .topbar,
    .activity-header.hide-xs {
        display: flex !important;
    }

    /* Sidebar still hidden — using bottom nav */
    .sidebar {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
        padding: 1.5rem;
    }

    .content-area {
        padding: 1.5rem;
        max-width: 960px;
        margin: 0 auto;
    }

    .activity-header {
        margin-bottom: 2rem;
    }

    .activity-header h1 {
        font-size: 2rem;
    }

    /* Math elements scale for laptop */
    .math-problem {
        padding: 2.5rem;
        max-width: 700px;
    }

    .equation {
        font-size: 2.25rem;
    }

    .block {
        width: 35px;
        height: 35px;
    }

    /* Module index — 2-column grid on laptop */
    .activities-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .module-header {
        padding: 2rem 1.5rem;
    }

    .module-header h1 {
        font-size: 1.75rem;
    }

    /* Canvas/game */
    #gameCanvas {
        height: 400px;
    }

    video {
        height: 350px;
    }

    /* Tracing */
    .tracing-box {
        padding: 2.5rem;
    }
}

/* =====================================================
   DESKTOPS (1280px+) 
   ===================================================== */
@media screen and (min-width: 1280px) {
    .activity-container {
        padding: 0;
    }

    .activity-content {
        padding: 2rem;
        max-width: 1000px;
    }

    /* Desktop header shown */
    .mobile-header {
        display: none !important;
    }

    .activity-navbar {
        display: none !important;
    }

    .sidebar {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
        width: 100% !important;
        padding: 2rem;
    }

    .content-area {
        max-width: 1100px;
        margin: 0 auto;
        padding: 2rem;
    }

    .activity-header h1 {
        font-size: 2.5rem;
    }

    .math-problem {
        padding: 3rem;
        max-width: 700px;
    }

    .equation {
        font-size: 2.5rem;
    }

    .activities-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1.5rem;
    }

    .module-header {
        padding: 2.5rem 2rem;
    }

    .module-header h1 {
        font-size: 2rem;
    }

    video {
        height: 400px;
    }

    #gameCanvas {
        height: 500px;
    }

    .tracing-box {
        padding: 3rem;
        max-width: 650px;
    }
}

/* =====================================================
   KEYBOARD & FOCUS — Accessibility for all sizes
   ===================================================== */
.answer-btn:focus,
.submit-btn:focus,
.clear-btn:focus,
.button-control:focus {
    outline: 3px solid var(--color-primary, #4f46e5);
    outline-offset: 2px;
}

/* =====================================================
   PRINT — Clean layout for printing
   ===================================================== */
@media print {

    .bottom-nav,
    .mobile-header,
    .activity-navbar,
    .topbar,
    .sidebar {
        display: none !important;
    }

    body {
        padding-bottom: 0 !important;
    }
}