/*
 * DET Practice Hub
 *
 * Visual language mirrors the canonical PrepEx TOEFL practice hub:
 * sage green primary, cream -> paper background, soft warm borders,
 * subtle shadows, Poppins typography. All class names match the
 * DET hub HTML and JS task modules - this file only reskins.
 */

:root {
    --det-bg: #F7F4EF;            /* cream */
    --det-card: #FEFEFE;          /* paper white */
    --det-card-soft: rgba(92, 111, 92, 0.05);  /* primary tint */
    --det-border: #E8E3DA;        /* warm hairline */
    --det-text: #1A1816;          /* ink */
    --det-text-secondary: #3A3633;
    --det-muted: #9E9689;
    --det-primary: #5C6F5C;       /* PrepEx sage */
    --det-primary-dark: #2d5f4d;
    --det-primary-light: rgba(92, 111, 92, 0.08);
    --det-primary-border: rgba(92, 111, 92, 0.15);
    --det-success: #10B981;       /* used for correct states */
    --det-danger: #b45449;
    --det-warning: #b87433;
    --det-shadow-card: 0 1px 3px rgba(26, 24, 22, 0.04);
    --det-shadow-card-hover: 0 6px 18px rgba(92, 111, 92, 0.10);
    --det-radius-card: 12px;
    --det-radius-soft: 8px;
    --det-radius-pill: 999px;
}

body.dark-mode {
    --det-bg: #1A1A1A;
    --det-card: #222222;
    --det-card-soft: rgba(127, 168, 127, 0.08);
    --det-border: #2D2D2D;
    --det-text: #E8E6E3;
    --det-text-secondary: #C9C5C0;
    --det-muted: #888581;
    --det-primary: #7FA87F;
    --det-primary-dark: #9bc49b;
    --det-primary-light: rgba(127, 168, 127, 0.12);
    --det-primary-border: rgba(127, 168, 127, 0.2);
    --det-shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3);
    --det-shadow-card-hover: 0 6px 18px rgba(127, 168, 127, 0.2);
}

.det-practice-container,
.det-practice-container * {
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

.det-practice-container {
    --section-color: var(--det-primary);
    --section-tint: var(--det-primary-light);
    --section-border: var(--det-primary-border);

    background: linear-gradient(135deg, var(--det-bg) 0%, var(--det-card) 100%);
    color: var(--det-text);
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr);
    min-height: calc(100vh - 64px);
}

/* Section theming: drive header accents + section cards from the active section,
   so the whole shell shifts color when you switch tabs (Duolingo-style). */
.det-practice-container[data-active-section="reading"] {
    --section-color: #3B82F6;
    --section-tint: rgba(59, 130, 246, 0.12);
    --section-border: rgba(59, 130, 246, 0.25);
}
.det-practice-container[data-active-section="listening"] {
    --section-color: #8B5CF6;
    --section-tint: rgba(139, 92, 246, 0.12);
    --section-border: rgba(139, 92, 246, 0.25);
}
.det-practice-container[data-active-section="writing"] {
    --section-color: #F59E0B;
    --section-tint: rgba(245, 158, 11, 0.14);
    --section-border: rgba(245, 158, 11, 0.28);
}
.det-practice-container[data-active-section="speaking"] {
    --section-color: #EC4899;
    --section-tint: rgba(236, 72, 153, 0.12);
    --section-border: rgba(236, 72, 153, 0.25);
}

/* ------------------------------------------------------------------ */
/* Sidebar                                                            */
/* ------------------------------------------------------------------ */

.det-practice-sidebar {
    background: var(--det-card);
    border-right: 1px solid var(--det-border);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding: 1.1rem 0.85rem;
}

/* ---- Brand block -------------------------------------------------- */

.det-sidebar-brand {
    align-items: center;
    display: flex;
    gap: 0.6rem;
    padding: 0.25rem 0.4rem 0.5rem;
}

.det-brand-mark {
    align-items: center;
    background: var(--det-primary);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(92, 111, 92, 0.22);
    color: #FFFFFF;
    display: flex;
    flex-shrink: 0;
    height: 36px;
    justify-content: center;
    width: 36px;
}

.det-brand-mark svg {
    height: 20px;
    width: 20px;
}

.det-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.det-brand-name {
    color: var(--det-text);
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.det-brand-sub {
    color: var(--det-muted);
    font-size: 0.72rem;
    font-weight: 500;
    margin-top: 0.1rem;
}

/* Backward-compat: original header bits still in DOM from other code paths.
   They render nothing here because the brand block replaces them. */
.det-sidebar-header {
    display: none;
}

.det-sidebar-kicker,
.det-format-card,
.det-format-name,
.det-format-meta,
.det-sidebar-header p {
    display: none;
}

/* ---- Nav tabs ----------------------------------------------------- */
/* Color-coded skill tiles (Duolingo-style): each section gets its own
   accent that lights up the tile + active state. The base PrepEx green
   stays as the brand/usage color, so the page still reads as PrepEx. */

.det-sidebar-tabs {
    display: grid;
    gap: 0.25rem;
    margin-top: 0.15rem;
}

.det-sidebar-tab,
.det-mobile-tab,
.det-btn,
.det-filter-chip {
    border: 0;
    cursor: pointer;
    font-weight: 600;
}

.det-sidebar-tab {
    --tab-color: var(--det-primary);
    --tab-tint: var(--det-primary-light);

    align-items: center;
    background: transparent;
    border-radius: 14px;
    color: var(--det-text-secondary);
    display: flex;
    gap: 0.7rem;
    padding: 0.55rem 0.6rem;
    text-align: left;
    transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.det-sidebar-tab[data-section="reading"] {
    --tab-color: #3B82F6;
    --tab-tint: rgba(59, 130, 246, 0.12);
}
.det-sidebar-tab[data-section="listening"] {
    --tab-color: #8B5CF6;
    --tab-tint: rgba(139, 92, 246, 0.12);
}
.det-sidebar-tab[data-section="writing"] {
    --tab-color: #F59E0B;
    --tab-tint: rgba(245, 158, 11, 0.14);
}
.det-sidebar-tab[data-section="speaking"] {
    --tab-color: #EC4899;
    --tab-tint: rgba(236, 72, 153, 0.12);
}

.det-sidebar-tab:hover {
    background: var(--tab-tint);
    color: var(--tab-color);
    transform: translateY(-1px);
}

.det-sidebar-tab.active {
    background: var(--tab-tint);
    color: var(--tab-color);
    font-weight: 700;
}

.det-sidebar-tab.active .det-tab-tile {
    box-shadow: 0 4px 10px color-mix(in srgb, var(--tab-color) 30%, transparent);
    transform: scale(1.06);
}

.det-mobile-tab.active {
    background: var(--det-primary-light);
    color: var(--det-primary);
}

/* Skill tile: rounded colored square that holds the icon.
   Uses currentColor so the same rule recolors per-section via --tab-color. */
.det-tab-tile {
    align-items: center;
    background: var(--tab-color);
    border-radius: 10px;
    color: #FFFFFF;
    display: flex;
    flex-shrink: 0;
    height: 34px;
    justify-content: center;
    opacity: 0.85;
    transition: opacity 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
    width: 34px;
}

.det-sidebar-tab:hover .det-tab-tile,
.det-sidebar-tab.active .det-tab-tile {
    opacity: 1;
}

.det-tab-tile svg {
    fill: none;
    height: 18px;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 2;
    width: 18px;
}

.det-tab-label {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: -0.005em;
}

.det-tab-icon {
    /* Legacy selector kept for any caller that still uses it; hidden by default. */
    display: none;
}

.det-tab-icon svg {
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 2;
}

/* ---- Daily goal widget (usage tracker) ---------------------------- */
/* Pinned to the bottom, chunky pill bar, game-y CTA. */

.det-usage-tracker {
    background: linear-gradient(180deg, var(--det-primary-light), transparent 80%);
    border: 1px solid var(--det-primary-border);
    border-radius: 16px;
    box-shadow: none;
    margin: auto 0 0;
    padding: 0.9rem 0.95rem;
    transition: opacity 0.25s ease;
}

.det-usage-tracker.loading {
    opacity: 0;
}

.det-usage-tracker.unlimited {
    background: var(--det-primary-light);
    border-color: var(--det-primary-border);
}

.det-usage-tracker-header,
.det-usage-tracker-footer {
    align-items: center;
    display: flex;
    justify-content: space-between;
}

.det-usage-tracker-header {
    margin-bottom: 0.5rem;
}

.det-usage-tracker-label {
    color: var(--det-text-secondary);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.det-usage-tracker-count {
    color: var(--det-text);
    font-size: 0.78rem;
    font-weight: 600;
}

.det-usage-tracker-count .count-number {
    color: var(--det-primary);
    font-size: 1.05rem;
    font-weight: 800;
}

.det-usage-tracker-count.depleted .count-number {
    color: var(--det-primary);
}

.det-usage-tracker-bar {
    background: color-mix(in srgb, var(--det-border) 80%, transparent);
    border-radius: 999px;
    height: 8px;
    margin-bottom: 0.55rem;
    overflow: hidden;
}

.det-usage-tracker-fill {
    background: linear-gradient(90deg, var(--det-primary), var(--det-primary-dark));
    border-radius: inherit;
    height: 100%;
    transition: width 0.4s ease;
}

.det-usage-tracker-fill.warning {
    background: linear-gradient(90deg, var(--det-primary), var(--det-primary-dark));
}

.det-usage-tracker-fill.depleted {
    background: var(--det-muted);
}

.det-usage-tracker-footer {
    color: var(--det-muted);
    font-size: 0.72rem;
}

.det-usage-tracker-reset {
    align-items: center;
    display: flex;
    gap: 0.3rem;
}

.det-usage-tracker-reset svg,
.det-usage-tracker-unlimited svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

.det-usage-tracker-reset svg {
    height: 12px;
    width: 12px;
}

.det-usage-tracker-upgrade {
    background: var(--det-primary);
    border-radius: 999px;
    color: #FFFFFF;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.3rem 0.7rem;
    text-decoration: none;
    transition: background 0.15s ease;
}

.det-usage-tracker-upgrade:hover {
    background: var(--det-primary-dark);
    text-decoration: none;
}

.det-usage-tracker-unlimited {
    align-items: center;
    color: var(--det-primary);
    display: flex;
    gap: 0.4rem;
    justify-content: flex-start;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.25rem 0;
}

.det-usage-tracker-unlimited svg {
    height: 14px;
    width: 14px;
}

.det-usage-tracker-unlimited.hidden {
    display: none;
}

/* ------------------------------------------------------------------ */
/* Main content                                                       */
/* ------------------------------------------------------------------ */

.det-main-content {
    background: linear-gradient(135deg, var(--det-bg) 0%, var(--det-card) 100%);
    min-width: 0;
    padding: 2.5rem 3rem 6rem;
}

.det-page-header,
.det-content-header,
.det-task-top,
.det-actions {
    align-items: center;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}

.det-page-header {
    align-items: center;
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(26, 24, 22, 0.04);
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(0, 1fr) auto;
    margin-bottom: 1.5rem;
    overflow: hidden;
    padding: clamp(1.5rem, 3vw, 2.25rem);
    position: relative;
}

/* Soft section-colored glow behind the title, so the active section's
   color shows up at the top of the page without a heavy fill. */
.det-page-header::before {
    background: radial-gradient(circle at 0% 0%, var(--section-tint), transparent 65%);
    content: '';
    inset: 0;
    pointer-events: none;
    position: absolute;
}

.det-page-header > * {
    position: relative;
    z-index: 1;
}

.det-eyebrow {
    align-items: center;
    background: var(--section-tint);
    border-radius: 999px;
    color: var(--section-color);
    display: inline-flex;
    font-size: 0.7rem;
    font-weight: 700;
    gap: 0.4rem;
    letter-spacing: 0.06em;
    margin-bottom: 0.7rem;
    padding: 0.3rem 0.75rem;
    text-transform: uppercase;
    width: fit-content;
}

.det-page-header h1 {
    color: var(--det-text);
    font-size: clamp(1.85rem, 3.4vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.1;
    margin: 0;
}

.det-page-header p {
    color: var(--det-muted);
    font-size: 0.95rem;
    line-height: 1.55;
    margin: 0.55rem 0 0;
    max-width: 720px;
}

.det-header-card {
    align-items: center;
    background: linear-gradient(135deg, var(--section-color), color-mix(in srgb, var(--section-color) 70%, #000));
    border-radius: 16px;
    box-shadow: 0 8px 20px color-mix(in srgb, var(--section-color) 28%, transparent);
    color: #FFFFFF;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 9rem;
    padding: 1.1rem 1.25rem;
    text-align: center;
}

.det-header-card span {
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.det-header-card strong {
    color: #FFFFFF;
    display: block;
    font-size: 1.85rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.det-header-card small {
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.72rem;
    line-height: 1.4;
}

.det-pill {
    background: var(--det-primary-light);
    border: 0;
    border-radius: 999px;
    color: var(--det-primary);
    display: inline-flex;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.3rem 0.7rem;
    text-transform: none;
}

.det-home-hero,
.det-content-block,
.det-practice-panel,
.det-empty-state {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(26, 24, 22, 0.04);
}

.det-home-hero,
.det-content-block,
.det-practice-panel,
.det-empty-state {
    padding: clamp(1.5rem, 3vw, 2.25rem);
}

.det-home-hero {
    background: linear-gradient(135deg, var(--det-primary-dark) 0%, var(--det-primary) 100%);
    border-color: transparent;
    box-shadow: 0 18px 40px rgba(45, 95, 77, 0.20);
    color: #FFFFFF;
    overflow: hidden;
    position: relative;
}

.det-home-hero::after,
.det-home-hero::before {
    background: rgba(255, 255, 255, 0.10);
    border-radius: 999px;
    content: '';
    position: absolute;
    z-index: 0;
}

.det-home-hero::after {
    height: 280px;
    right: -90px;
    top: -110px;
    width: 280px;
}

.det-home-hero::before {
    background: rgba(255, 255, 255, 0.06);
    bottom: -80px;
    height: 200px;
    left: 40%;
    width: 200px;
}

.det-home-hero h2 {
    color: #FFFFFF;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.1;
    margin: 0;
    max-width: 760px;
    position: relative;
    z-index: 1;
}

.det-home-hero p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.65;
    margin: 0.85rem 0 0;
    max-width: 760px;
    position: relative;
    z-index: 1;
}

.det-content-header h2,
.det-item-title {
    color: var(--det-text);
    font-size: clamp(1.3rem, 2.5vw, 1.85rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
}

.det-actions {
    flex-wrap: wrap;
    justify-content: flex-start;
    margin-top: 1.4rem;
}

/* ------------------------------------------------------------------ */
/* Buttons                                                            */
/* ------------------------------------------------------------------ */

.det-btn {
    align-items: center;
    background: var(--det-primary);
    border: 0;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(92, 111, 92, 0.2);
    color: #FFFFFF;
    display: inline-flex;
    font-size: 0.9rem;
    font-weight: 600;
    gap: 0.5rem;
    justify-content: center;
    letter-spacing: -0.005em;
    padding: 0.7rem 1.25rem;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.det-btn:hover {
    background: var(--det-primary-dark);
    box-shadow: 0 6px 16px rgba(92, 111, 92, 0.28);
    transform: translateY(-1px);
}

.det-btn:active {
    transform: translateY(0);
}

.det-btn-primary {
    background: var(--det-primary);
    color: #FFFFFF;
}

.det-btn-secondary {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    box-shadow: none;
    color: var(--det-text);
}

.det-btn-secondary:hover {
    background: var(--det-card);
    border-color: var(--det-primary);
    box-shadow: none;
    color: var(--det-primary);
}

.det-btn:disabled {
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.5;
    transform: none;
}

.det-usage-banner {
    align-items: center;
    background: var(--det-primary-light);
    border: 1px solid var(--det-primary-border);
    border-radius: 16px;
    box-shadow: none;
    color: var(--det-text-secondary);
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    margin: 1.25rem 0;
    padding: 0.9rem 1.1rem;
}

.det-usage-banner strong {
    color: var(--det-text);
    font-size: 0.9rem;
}

.det-usage-banner span {
    color: var(--det-muted);
    display: block;
    font-size: 0.78rem;
}

.det-usage-banner a {
    color: var(--det-primary);
    font-weight: 700;
}

.det-usage-banner a:hover {
    color: var(--det-primary-dark);
}

/* ------------------------------------------------------------------ */
/* Progress overview, section grid, item grid                         */
/* ------------------------------------------------------------------ */

.det-progress-overview,
.det-section-grid,
.det-item-grid,
.det-task-grid {
    display: grid;
    gap: 0.9rem;
}

.det-progress-overview {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 1.25rem 0;
}

.det-progress-stat,
.det-result-row {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: 16px;
    padding: 1.1rem;
}

.det-progress-stat {
    align-items: flex-start;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.det-progress-stat span {
    color: var(--det-muted);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.det-progress-stat strong {
    color: var(--det-text);
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.det-section-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.det-item-grid,
.det-task-grid {
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    margin-top: 1rem;
}

/* Section + item cards share the same look: a colored skill tile on the
   left, title to the right, status at the top. Echoes the sidebar tiles. */
.det-section-card,
.det-item-card {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: 18px;
    box-shadow: 0 4px 14px rgba(26, 24, 22, 0.03);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    padding: 1.35rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.det-section-card:hover,
.det-item-card:hover {
    border-color: var(--det-primary);
    box-shadow: 0 12px 28px rgba(92, 111, 92, 0.12);
    transform: translateY(-2px);
}

.det-section-card,
.det-item-card .det-btn {
    width: 100%;
}

.det-item-card .det-btn {
    margin-top: auto;
}

.det-card-status {
    background: var(--det-primary-light);
    border-radius: 999px;
    color: var(--det-primary);
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    padding: 0.25rem 0.65rem;
    text-transform: uppercase;
    width: fit-content;
}

.det-task-meta {
    color: var(--det-muted);
    font-size: 0.78rem;
    font-weight: 500;
}

.det-section-card p,
.det-item-card p {
    color: var(--det-text-secondary);
    font-size: 0.86rem;
    line-height: 1.5;
    margin: 0;
}

.det-section-card h2 {
    color: var(--det-text);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
}

.det-filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.det-filter-chip {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: 999px;
    color: var(--det-text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.45rem 0.95rem;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    user-select: none;
}

.det-filter-chip:hover {
    background: var(--det-primary-light);
    border-color: var(--det-primary-border);
    color: var(--det-primary);
}

.det-filter-chip.active {
    background: var(--det-primary);
    border-color: var(--det-primary);
    color: #FFFFFF;
}

/* ------------------------------------------------------------------ */
/* Item body and content preview                                      */
/* ------------------------------------------------------------------ */

.det-item-body {
    display: grid;
    gap: 1rem;
}

.det-content-preview {
    background: var(--det-primary-light);
    border: 1px solid var(--det-primary-border);
    border-radius: var(--det-radius-card);
    color: var(--det-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    padding: 1.25rem;
    white-space: pre-wrap;
}

.det-question-list {
    display: grid;
    gap: 1rem;
}

.det-question-card {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    padding: 1.25rem;
}

.det-question-card strong {
    color: var(--det-text);
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
}

.det-question-card label {
    display: block;
    margin-top: 0.5rem;
    cursor: pointer;
}

.det-input,
.det-textarea {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    color: var(--det-text);
    font: inherit;
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

.det-input:focus,
.det-textarea:focus {
    border-color: var(--det-primary);
    box-shadow: 0 0 0 3px var(--det-primary-light);
    outline: none;
}

.det-textarea {
    min-height: 12rem;
    resize: vertical;
}

.det-input::placeholder,
.det-textarea::placeholder {
    color: var(--det-muted);
}

/* ------------------------------------------------------------------ */
/* Result panel                                                       */
/* ------------------------------------------------------------------ */

.det-result-panel {
    background: var(--det-primary-light);
    border: 1px solid var(--det-primary-border);
    border-radius: var(--det-radius-card);
    margin-top: 1rem;
    padding: 1.25rem;
}

.det-result-panel p {
    color: var(--det-text);
    margin: 0;
}

.det-result-row small,
.det-result-row p {
    color: var(--det-muted);
}

.det-result-row.correct {
    border-color: rgba(16, 185, 129, 0.3);
}

.det-result-row.incorrect {
    border-color: rgba(180, 84, 73, 0.3);
}

/* ------------------------------------------------------------------ */
/* Task player                                                        */
/* ------------------------------------------------------------------ */

.det-task-directions {
    background: var(--det-primary-light);
    border-left: 3px solid var(--det-primary);
    border-radius: 0 var(--det-radius-soft) var(--det-radius-soft) 0;
    color: var(--det-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0 0 1rem;
    padding: 0.85rem 1rem;
}

.det-task-player,
.det-phase-stack,
.det-speaking-layout,
.det-results-card {
    display: grid;
    gap: 1rem;
}

.det-official-frame,
.det-official-header,
.det-passage-card,
.det-scenario-card,
.det-dialogue-card,
.det-media-card,
.det-focus-card,
.det-task-phase,
.det-speaking-prompt-card,
.det-speaking-stage,
.det-speaking-stage-card,
.det-latest-card,
.det-transcript-card,
.det-priority-card,
.det-feedback-grid article,
.det-results-score-block,
.det-results-summary-block,
.det-criteria-card,
.det-metric-card {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-card);
    padding: 1.25rem;
}

.det-official-header {
    align-items: flex-start;
    background: var(--det-primary-light);
    border-color: var(--det-primary-border);
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}

.det-official-stats {
    display: flex;
    flex: 0 0 auto;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: flex-end;
}

.det-official-stats span,
.det-phase-label,
.det-question-number,
.det-word-counter,
.det-writing-meter,
.det-dictation-top span {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-pill);
    color: var(--det-text-secondary);
    display: inline-flex;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.7rem;
}

.det-task-progress {
    background: var(--det-primary-light);
    border-radius: var(--det-radius-pill);
    height: 8px;
    overflow: hidden;
}

.det-task-progress span {
    background: var(--det-primary);
    border-radius: inherit;
    display: block;
    height: 100%;
    transition: width 0.25s ease;
}

.det-official-frame h3,
.det-official-header h3,
.det-passage-card h3,
.det-task-phase h3,
.det-speaking-prompt-card h3,
.det-speaking-stage h3,
.det-results-card h2,
.det-results-summary-block h3,
.det-transcript-card h3,
.det-feedback-grid h3 {
    color: var(--det-text);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0 0 0.5rem;
}

.det-official-frame p,
.det-official-header p,
.det-passage-card p,
.det-scenario-card p,
.det-task-phase p,
.det-speaking-prompt-card p,
.det-speaking-stage p,
.det-latest-card p,
.det-transcript-card p,
.det-feedback-grid li,
.det-results-summary-block p,
.det-phase-copy,
.det-audio-fallback {
    color: var(--det-text-secondary);
    line-height: 1.65;
}

.det-feedback-grid li {
    margin: 0.35rem 0;
}

/* ------------------------------------------------------------------ */
/* Read and Select carousel                                           */
/* ------------------------------------------------------------------ */

.det-word-carousel {
    display: grid;
}

.det-word-slide {
    align-items: center;
    display: none;
    min-height: 15rem;
    place-content: center;
    text-align: center;
}

.det-word-slide.active {
    display: grid;
}

.det-word-slide .det-word-token {
    font-size: clamp(2.4rem, 8vw, 4.5rem);
    margin: 1.5rem 0;
}

.det-step-actions,
.det-production-layout,
.det-dictation-top {
    align-items: center;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}

.det-word-grid {
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

.det-word-card {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-card);
    padding: 1.25rem;
}

.det-word-token {
    color: var(--det-text);
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
}

.det-word-actions,
.det-option-grid {
    display: grid;
    gap: 0.55rem;
    margin-top: 0.85rem;
}

.det-word-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.det-word-actions label,
.det-option-card {
    align-items: center;
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    cursor: pointer;
    display: flex;
    gap: 0.55rem;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.det-word-actions label:hover,
.det-word-actions label.selected,
.det-word-actions label:has(input:checked),
.det-option-card:hover,
.det-option-card:has(input:checked) {
    border-color: var(--det-primary);
    box-shadow: 0 0 0 3px var(--det-primary-light);
}

.det-compact-answer-grid {
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}

.det-fill-card,
.det-passage-blank-card,
.det-dictation-card {
    display: grid;
    gap: 0.7rem;
}

.det-word-completion-input {
    font-size: 1.05rem;
    font-weight: 600;
}

/* ------------------------------------------------------------------ */
/* Production / writing layout                                        */
/* ------------------------------------------------------------------ */

.det-production-layout {
    align-items: stretch;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 0.45fr);
}

.det-focus-card ul {
    color: var(--det-text-secondary);
    line-height: 1.7;
    margin: 0.75rem 0 0;
    padding-left: 1.1rem;
}

.det-writing-meter {
    justify-self: start;
    margin-top: -0.35rem;
}

.det-photo-card {
    margin: 0;
}

.det-photo-card img {
    border-radius: var(--det-radius-soft);
    display: block;
    width: 100%;
}

.det-media-card audio {
    margin-top: 0.75rem;
    width: 100%;
}

.det-dictation-card audio,
.det-speaking-prompt-list audio {
    width: 100%;
}

.det-dialogue-card {
    display: grid;
    gap: 0.65rem;
}

.det-dialogue-turn {
    background: var(--det-primary-light);
    border: 1px solid var(--det-primary-border);
    border-radius: var(--det-radius-soft);
    padding: 0.85rem 1rem;
}

.det-dialogue-turn strong,
.det-dialogue-turn span,
.det-review-answer-grid small,
.det-review-answer-grid span {
    display: block;
}

.det-dialogue-turn strong {
    color: var(--det-primary);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.det-dialogue-turn span {
    color: var(--det-text);
    margin-top: 0.25rem;
}

.det-summary-textarea {
    min-height: 8rem;
}

.det-sample-textarea {
    min-height: 16rem;
}

/* ------------------------------------------------------------------ */
/* Speaking layout                                                    */
/* ------------------------------------------------------------------ */

.det-speaking-layout {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.7fr);
}

.det-speaking-stage {
    align-self: start;
}

.det-speaking-timing-grid,
.det-criteria-grid,
.det-delivery-grid,
.det-feedback-grid,
.det-results-overview-grid,
.det-results-kpis {
    display: grid;
    gap: 0.8rem;
}

.det-speaking-timing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 1rem 0;
}

.det-speaking-timing-grid div {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    padding: 0.8rem;
}

.det-speaking-timing-grid strong,
.det-speaking-timing-grid span {
    display: block;
}

.det-speaking-timing-grid strong,
.det-speaking-countdown {
    color: var(--det-primary);
    font-weight: 700;
}

.det-speaking-countdown {
    font-size: clamp(3rem, 8vw, 5rem);
    letter-spacing: -0.06em;
    line-height: 1;
    margin: 0.75rem 0;
}

.det-speaking-stage-card.recording {
    background: linear-gradient(135deg, var(--det-primary-light), var(--det-card));
    border-color: var(--det-primary);
}

.det-speaking-meter {
    align-items: end;
    display: flex;
    gap: 0.35rem;
    height: 44px;
    margin: 1rem 0;
}

.det-speaking-meter span {
    animation: det-meter-pulse 0.9s ease-in-out infinite alternate;
    background: var(--det-primary);
    border-radius: var(--det-radius-pill);
    flex: 1;
    min-height: 16px;
}

.det-speaking-meter span:nth-child(2) { animation-delay: 0.1s; }
.det-speaking-meter span:nth-child(3) { animation-delay: 0.2s; }
.det-speaking-meter span:nth-child(4) { animation-delay: 0.3s; }
.det-speaking-meter span:nth-child(5) { animation-delay: 0.4s; }

@keyframes det-meter-pulse {
    from {
        height: 18px;
        opacity: 0.45;
    }
    to {
        height: 44px;
        opacity: 1;
    }
}

.det-speaking-progress {
    background: var(--det-primary-light);
    border-radius: var(--det-radius-pill);
    height: 8px;
    overflow: hidden;
}

.det-speaking-progress span {
    animation: det-progress-slide 2.2s ease-in-out infinite;
    background: var(--det-primary);
    border-radius: inherit;
    display: block;
    height: 100%;
    width: 45%;
}

@keyframes det-progress-slide {
    from { transform: translateX(-100%); }
    to { transform: translateX(240%); }
}

.det-speaking-prompt-list {
    display: grid;
    gap: 0.65rem;
    margin-top: 0.85rem;
}

.det-speaking-prompt-list article {
    align-items: flex-start;
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    display: flex;
    gap: 0.75rem;
    padding: 0.85rem;
}

.det-speaking-prompt-list article > div {
    display: grid;
    gap: 0.5rem;
    width: 100%;
}

.det-speaking-prompt-list small {
    color: var(--det-muted);
    font-size: 0.78rem;
}

.det-speaking-prompt-list span {
    align-items: center;
    background: var(--det-primary);
    border-radius: var(--det-radius-pill);
    color: #FFFFFF;
    display: inline-flex;
    flex: 0 0 1.75rem;
    font-size: 0.8rem;
    font-weight: 700;
    height: 1.75rem;
    justify-content: center;
}

.det-speaking-focus {
    margin-top: 1rem;
}

.det-speaking-focus ul,
.det-feedback-grid ul {
    margin: 0.7rem 0 0;
    padding-left: 1.1rem;
}

.det-latest-card {
    grid-column: 1 / -1;
}

.det-latest-card strong {
    color: var(--det-primary);
    display: block;
    font-size: 1.7rem;
    margin-top: 0.55rem;
}

/* ------------------------------------------------------------------ */
/* Results card                                                       */
/* ------------------------------------------------------------------ */

.det-results-card {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-card);
    box-shadow: var(--det-shadow-card);
    padding: clamp(1.5rem, 3vw, 2rem);
}

.det-results-header {
    align-items: center;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}

.det-results-header h2 {
    color: var(--det-text);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0.4rem 0;
}

.det-results-header p {
    color: var(--det-muted);
    margin: 0;
}

.det-results-score-badge {
    background: var(--det-primary-light);
    border: 1px solid var(--det-primary-border);
    border-radius: var(--det-radius-card);
    min-width: 9rem;
    padding: 1.25rem;
    text-align: center;
}

.det-results-score-badge strong {
    color: var(--det-primary);
    display: block;
    font-size: 2rem;
    font-weight: 800;
}

.det-results-score-badge span {
    color: var(--det-muted);
    display: block;
    font-size: 0.78rem;
}

.det-result-tabs {
    background: var(--det-primary-light);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.45rem;
}

.det-result-tab {
    background: transparent;
    border: 0;
    border-bottom: 3px solid transparent;
    border-radius: var(--det-radius-soft);
    color: var(--det-muted);
    cursor: pointer;
    flex: 1 1 140px;
    font: inherit;
    font-weight: 600;
    padding: 0.7rem 1rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.det-result-tab.active,
.det-result-tab:hover {
    background: var(--det-card);
    border-bottom-color: var(--det-primary);
    color: var(--det-primary);
}

.det-result-tab-panel[hidden] {
    display: none;
}

.det-results-overview-grid {
    grid-template-columns: 180px minmax(0, 1fr);
}

.det-results-score-block strong {
    color: var(--det-primary);
    display: block;
    font-size: 2.6rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    margin: 0.4rem 0;
}

.det-results-score-block span,
.det-results-score-block small,
.det-results-kpis span,
.det-review-answer-grid small,
.det-results-subhead {
    color: var(--det-muted);
}

.det-results-kpis {
    display: flex;
    flex-wrap: wrap;
}

.det-results-kpis span {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-pill);
    font-size: 0.82rem;
    padding: 0.45rem 0.7rem;
}

.det-review-list,
.det-constructed-review {
    display: grid;
    gap: 0.85rem;
}

.det-result-row {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 1fr) minmax(180px, 0.45fr);
}

.det-result-row p {
    color: var(--det-muted);
    margin: 0.35rem 0 0;
}

.det-review-answer-grid {
    background: var(--det-card);
    border: 1px solid var(--det-border);
    border-radius: var(--det-radius-soft);
    display: grid;
    gap: 0.25rem;
    padding: 0.75rem;
}

.det-criteria-grid {
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
}

.det-criteria-card strong,
.det-metric-card strong {
    color: var(--det-primary);
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
}

.det-criteria-card span,
.det-metric-card span {
    color: var(--det-muted);
    display: block;
    font-size: 0.82rem;
}

.det-delivery-grid {
    grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.det-results-subhead {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    margin: 1rem 0 0;
    text-transform: uppercase;
}

.det-priority-card p {
    color: var(--det-text);
    font-size: 1.05rem;
    font-weight: 600;
}

.det-feedback-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* ------------------------------------------------------------------ */
/* Mobile bottom tabs                                                 */
/* ------------------------------------------------------------------ */

.det-mobile-tabs {
    display: none;
}

@media (max-width: 980px) {
    .det-practice-container {
        display: block;
    }

    .det-practice-sidebar {
        display: none;
    }

    .det-main-content {
        padding: 1.5rem 1rem 6rem;
    }

    .det-page-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .det-progress-overview,
    .det-section-grid,
    .det-speaking-layout,
    .det-production-layout,
    .det-results-overview-grid,
    .det-result-row,
    .det-feedback-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .det-speaking-layout,
    .det-production-layout,
    .det-results-overview-grid,
    .det-result-row {
        grid-template-columns: 1fr;
    }

    .det-mobile-tabs {
        background: var(--det-card);
        border-top: 1px solid var(--det-border);
        bottom: 0;
        box-shadow: 0 -4px 20px rgba(26, 24, 22, 0.06);
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        left: 0;
        position: fixed;
        right: 0;
        z-index: 90;
    }

    .det-mobile-tab {
        background: var(--det-card);
        color: var(--det-text-secondary);
        font-size: 0.7rem;
        font-weight: 600;
        padding: 0.7rem 0.35rem;
        transition: color 0.15s ease;
    }

    .det-mobile-tab:hover {
        color: var(--det-primary);
    }
}

@media (max-width: 640px) {
    .det-progress-overview,
    .det-section-grid,
    .det-word-actions,
    .det-feedback-grid {
        grid-template-columns: 1fr;
    }

    .det-results-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .det-official-header,
    .det-step-actions,
    .det-dictation-top {
        align-items: stretch;
        flex-direction: column;
    }

    .det-official-stats {
        justify-content: flex-start;
    }
}