:root {
    --bg: #0f172a;
    --bg-soft: #111827;
    --card: rgba(255,255,255,0.08);
    --card-border: rgba(255,255,255,0.14);
    --text: #f8fafc;
    --muted: #cbd5e1;
    --primary: #4f46e5;
    --primary-2: #7c3aed;
    --yellow: #facc15;
    --green: #22c55e;
    --red: #ef4444;
    --idle: #64748b;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: Inter, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(124, 58, 237, 0.22), transparent 35%),
        radial-gradient(circle at top right, rgba(79, 70, 229, 0.22), transparent 30%),
        linear-gradient(180deg, #0b1120 0%, #111827 100%);
    min-height: 100%;
}

body.student-body,
body.admin-body {
    min-height: 100vh;
}

.page-shell,
.admin-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 32px auto;
}

.narrow-shell {
    width: min(980px, calc(100% - 32px));
}

.hero-card,
.admin-header,
.admin-card,
.control-card,
.practice-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
}

.hero-card,
.admin-header {
    border-radius: var(--radius-xl);
    padding: 32px;
    margin-bottom: 24px;
}

.hero-badge {
    display: inline-flex;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,0.09);
    border: 1px solid rgba(255,255,255,0.18);
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

h1, h2, h3, p {
    margin-top: 0;
}

h1 {
    font-size: clamp(30px, 4vw, 52px);
    line-height: 1.04;
    margin-bottom: 14px;
}

h2 {
    font-size: 24px;
    margin-bottom: 18px;
}

h3 {
    font-size: 20px;
    margin-bottom: 6px;
}

.hero-text,
.admin-header p,
.section-item p,
.meta-row,
.mini-note,
.back-link,
.ghost-link,
.field-label,
.empty-state,
.question-caption {
    color: var(--muted);
}

.layout-grid,
.admin-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 24px;
}

.admin-grid.single-column {
    grid-template-columns: 1fr;
}

.control-card,
.practice-card,
.admin-card {
    border-radius: var(--radius-xl);
    padding: 28px;
}

.input-control {
    width: 100%;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(15, 23, 42, 0.72);
    color: var(--text);
    border-radius: 14px;
    padding: 14px 16px;
    font-size: 16px;
    outline: none;
    transition: 0.2s ease;
}

.input-control:focus {
    border-color: rgba(129, 140, 248, 0.9);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.18);
}

.textarea-control {
    min-height: 120px;
    resize: vertical;
}

.large-textarea {
    min-height: 140px;
}

.field-label {
    display: block;
    font-size: 14px;
    margin-bottom: 10px;
}

.stack-form > * + * {
    margin-top: 16px;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.primary-btn,
.secondary-btn,
.danger-btn,
.ghost-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 16px;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.18s ease, opacity 0.18s ease, background 0.18s ease;
}

.primary-btn:hover,
.secondary-btn:hover,
.danger-btn:hover,
.ghost-link:hover {
    transform: translateY(-1px);
}

.primary-btn {
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
}

.secondary-btn,
.ghost-link {
    color: white;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
}

.danger-btn {
    color: white;
    background: rgba(239, 68, 68, 0.22);
    border: 1px solid rgba(239, 68, 68, 0.35);
}

.small-btn {
    padding: 10px 14px;
    font-size: 14px;
}

.practice-card {
    min-height: 520px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.practice-card::after {
    content: '';
    position: absolute;
    inset: auto -20% -40% auto;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    filter: blur(40px);
}

.status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 10px 16px;
    border-radius: 999px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 13px;
}

.timer-label {
    font-size: 15px;
    color: var(--muted);
}

.timer-display {
    font-size: clamp(110px, 18vw, 190px);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.04em;
    margin: 28px 0 12px;
}

.question-wrap {
    position: relative;
    z-index: 2;
    padding: 22px;
    border-radius: 22px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
}

.question-caption {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 13px;
    margin-bottom: 10px;
}

.question-text {
    font-size: clamp(24px, 3vw, 38px);
    line-height: 1.22;
    font-weight: 800;
}

.question-text p {
    margin: 0 0 0.72em;
}

.question-text p:last-child {
    margin-bottom: 0;
}

.practice-card.idle {
    background: linear-gradient(135deg, rgba(100, 116, 139, 0.22), rgba(59, 130, 246, 0.14));
}
.practice-card.think {
    background: linear-gradient(135deg, rgba(250, 204, 21, 0.50), rgba(245, 158, 11, 0.34));
}
.practice-card.speak {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.42), rgba(16, 185, 129, 0.28));
}
.practice-card.stop {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.48), rgba(220, 38, 38, 0.32));
}

.status-badge.idle { background: rgba(100,116,139,0.28); }
.status-badge.think { background: rgba(250,204,21,0.40); color: #111827; }
.status-badge.speak { background: rgba(34,197,94,0.35); }
.status-badge.stop { background: rgba(239,68,68,0.35); }

.checkbox-line {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
}

.checkbox-line input {
    width: 18px;
    height: 18px;
}

.section-list,
.question-list-admin {
    display: grid;
    gap: 16px;
}

.section-item,
.question-item-admin {
    padding: 18px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(15, 23, 42, 0.5);
}

.section-title-row,
.action-row,
.meta-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.section-title-row {
    justify-content: space-between;
}

.action-row {
    margin-top: 14px;
}

.wrap-row {
    justify-content: flex-start;
}

.pill {
    display: inline-flex;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pill-active {
    background: rgba(34, 197, 94, 0.18);
    color: #86efac;
}

.pill-muted {
    background: rgba(148, 163, 184, 0.16);
    color: #cbd5e1;
}

.back-link,
.ghost-link {
    font-size: 14px;
}

.empty-state,
.mini-note {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255,255,255,0.06);
    border: 1px dashed rgba(255,255,255,0.14);
}

.question-copy {
    font-size: 17px;
    line-height: 1.5;
}

.question-edit-box {
    width: 100%;
    margin-top: 14px;
    border-radius: 18px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.10);
    overflow: hidden;
}

.question-edit-box summary {
    list-style: none;
}

.question-edit-box summary::-webkit-details-marker {
    display: none;
}

.edit-summary {
    display: inline-flex;
    margin: 12px;
}

.question-edit-box[open] .edit-summary {
    margin-bottom: 0;
}

.inline-edit-form {
    padding: 0 12px 12px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

@media (max-width: 900px) {
    .layout-grid,
    .admin-grid {
        grid-template-columns: 1fr;
    }

    .form-row-2 {
        grid-template-columns: 1fr;
    }

    .hero-card,
    .admin-header,
    .admin-card,
    .control-card,
    .practice-card {
        padding: 22px;
    }

    .timer-display {
        font-size: clamp(84px, 24vw, 140px);
    }

    .question-text {
        font-size: 26px;
    }

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

    .question-image {
        width: 100%;
        max-height: 38vh;
        padding: 8px;
    }
}


.helper-note {
    font-size: 13px;
    color: var(--muted);
    margin-top: -6px;
}

.file-control {
    padding: 12px 14px;
}

.notice-box {
    margin-bottom: 24px;
    border-radius: 18px;
    padding: 14px 16px;
    border: 1px solid rgba(255,255,255,0.16);
    backdrop-filter: blur(12px);
}

.notice-error {
    background: rgba(239, 68, 68, 0.18);
    color: #fecaca;
    border-color: rgba(239, 68, 68, 0.30);
}

.notice-warning {
    background: rgba(250, 204, 21, 0.16);
    color: #fef3c7;
    border-color: rgba(250, 204, 21, 0.30);
}

.notice-success {
    background: rgba(34, 197, 94, 0.18);
    color: #dcfce7;
    border-color: rgba(34, 197, 94, 0.30);
}


.question-image-wrap {
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.question-image {
    display: block;
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: clamp(220px, 42vh, 460px);
    object-fit: contain;
    margin: 0 auto;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid rgba(255,255,255,0.12);
    padding: 10px;
}

.question-thumb-wrap {
    margin-bottom: 16px;
}

.question-thumb-admin {
    display: block;
    width: min(100%, 340px);
    max-height: 220px;
    object-fit: contain;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid rgba(255,255,255,0.12);
    padding: 8px;
}

.edit-thumb-wrap {
    margin-bottom: 10px;
}


.section-meta-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
}


.notice-info {
    border-color: rgba(91, 167, 255, 0.45);
    background: rgba(44, 88, 160, 0.22);
}


body.modal-open {
    overflow: hidden;
}

.question-image-button {
    display: block;
    width: 100%;
    padding: 0;
    margin: 0;
    border: 0;
    background: transparent;
    cursor: zoom-in;
}

.question-image-button:disabled {
    cursor: default;
}

.question-image-button:focus-visible {
    outline: 3px solid rgba(255,255,255,0.55);
    outline-offset: 8px;
    border-radius: 20px;
}

.question-image {
    border-radius: 18px;
    box-shadow: 0 18px 36px rgba(0,0,0,0.28);
}

.image-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.image-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 7, 18, 0.82);
    backdrop-filter: blur(10px);
}

.image-modal-dialog {
    position: relative;
    z-index: 1;
    width: min(96vw, 1200px);
    max-height: 92vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-modal-img {
    display: block;
    max-width: 100%;
    max-height: 92vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 24px 70px rgba(0,0,0,0.42);
}

.image-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    width: 48px;
    height: 48px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(15, 23, 42, 0.72);
    color: #fff;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.image-modal-close:hover {
    background: rgba(30, 41, 59, 0.92);
}

@media (max-width: 900px) {
    .image-modal {
        padding: 16px;
    }

    .image-modal-dialog,
    .image-modal-img {
        max-height: 88vh;
    }

    .image-modal-close {
        top: 8px;
        right: 8px;
        width: 44px;
        height: 44px;
    }
}



.header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.rich-text p {
    margin: 0 0 16px;
    color: var(--muted);
    line-height: 1.7;
}

.rich-text p:last-child {
    margin-bottom: 0;
}

.landing-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 28px;
    align-items: center;
}

.landing-hero:not(.has-image) {
    grid-template-columns: 1fr;
}

.landing-hero-copy {
    min-width: 0;
}

.landing-hero-media {
    display: flex;
    justify-content: center;
}

.landing-hero-image,
.landing-block-image,
.admin-image-preview {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 22px;
    border: 1px solid rgba(255,255,255,0.12);
    box-shadow: 0 18px 44px rgba(0,0,0,0.28);
}

.landing-hero-image {
    max-height: 420px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 26px;
}

.landing-block-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.landing-block-card,
.footer-note-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
    border-radius: var(--radius-xl);
}

.landing-block-card {
    overflow: hidden;
}

.landing-block-image-wrap {
    padding: 20px 20px 0;
}

.landing-block-content {
    padding: 24px;
}

.text-link {
    display: inline-flex;
    margin-top: 18px;
    color: #c7d2fe;
    font-weight: 700;
    text-decoration: none;
}

.text-link:hover {
    text-decoration: underline;
}

.footer-note-card {
    padding: 28px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.compact-actions {
    margin-top: 0;
}

.admin-image-preview-wrap {
    max-width: 300px;
}

.block-editor-item {
    position: relative;
}

.inline-delete-form {
    margin-top: 14px;
}

@media (max-width: 980px) {
    .landing-block-grid {
        grid-template-columns: 1fr;
    }

    .landing-hero {
        grid-template-columns: 1fr;
    }

    .footer-note-card {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 700px) {
    .header-actions,
    .hero-actions {
        width: 100%;
    }

    .header-actions > a,
    .hero-actions > a,
    .hero-actions > button {
        width: 100%;
    }
}


.header-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.login-shell {
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
}

.login-card {
    width: min(560px, 100%);
    margin: 0 auto;
}

.login-form .ghost-link {
    width: 100%;
}

.practice-hero-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 8px;
}

.back-link {
    white-space: nowrap;
}

.block-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-top: 18px;
}

.block-links .text-link {
    margin-top: 0;
}

.multi-links-editor {
    display: grid;
    gap: 14px;
}

.links-editor-list {
    display: grid;
    gap: 16px;
}

.link-editor-row {
    padding: 16px;
    border: 1px dashed rgba(255,255,255,0.12);
    border-radius: 18px;
    background: rgba(10, 16, 36, 0.22);
}

.compact-grid {
    align-items: end;
}

.link-row-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
}

.danger-outline {
    border-color: rgba(248, 113, 113, 0.35);
    color: #fecaca;
}

@media (max-width: 700px) {
    .practice-hero-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .back-link {
        width: 100%;
        text-align: center;
    }

    .link-row-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .link-row-actions .ghost-link {
        width: 100%;
        text-align: center;
    }
}

.bulk-upload-status {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(15, 23, 42, 0.42);
    color: #e5eefc;
    font-size: 0.95rem;
}

.bulk-upload-progress {
    border-color: rgba(96, 165, 250, 0.38);
    background: rgba(59, 130, 246, 0.16);
    color: #dbeafe;
}

.bulk-upload-success {
    border-color: rgba(34, 197, 94, 0.32);
    background: rgba(34, 197, 94, 0.16);
    color: #dcfce7;
}

.bulk-upload-error {
    border-color: rgba(239, 68, 68, 0.32);
    background: rgba(239, 68, 68, 0.16);
    color: #fecaca;
}

.hero-top-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-end;
}

.single-practice-layout {
    grid-template-columns: 320px 1fr;
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.section-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 260px;
    background: var(--card);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
    border-radius: var(--radius-xl);
    padding: 26px;
    gap: 22px;
}

.section-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.section-tag,
.section-timer-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 700;
    border: 1px solid rgba(255,255,255,0.14);
}

.section-tag {
    background: rgba(99, 102, 241, 0.16);
    color: #c7d2fe;
}

.section-timer-pill {
    background: rgba(255,255,255,0.08);
    color: var(--muted);
}

.section-card h2 {
    margin-bottom: 14px;
}

.section-description {
    color: var(--muted);
}

.section-description p:last-child {
    margin-bottom: 0;
}

.section-card-actions {
    display: flex;
    justify-content: flex-start;
}

.section-open-btn {
    min-width: 180px;
}

.section-list-card {
    padding: 32px;
}

.section-summary-list {
    display: grid;
    gap: 14px;
    margin-bottom: 22px;
}

.section-summary-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.42);
    border: 1px solid rgba(255,255,255,0.08);
}

.summary-label {
    color: var(--muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

@media (max-width: 980px) {
    .single-practice-layout,
    .section-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    .hero-top-actions {
        width: 100%;
        justify-content: stretch;
    }

    .hero-top-actions > a {
        width: 100%;
        text-align: center;
    }

    .section-card {
        padding: 22px;
    }

    .section-card-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-open-btn {
        width: 100%;
    }
}

.title-sections-panel {
    margin-top: 28px;
}

.section-panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 22px;
}

.section-panel-head h2 {
    margin-bottom: 10px;
}

.section-panel-head p {
    margin: 0;
    max-width: 760px;
    color: var(--muted);
}

.title-section-grid .section-card {
    min-height: 240px;
}

@media (max-width: 700px) {
    .section-panel-head {
        margin-bottom: 18px;
    }
}


.block-links {
    margin-top: 22px;
}

.block-links-intro {
    margin-bottom: 14px;
    color: var(--muted);
}

.block-links-intro p {
    margin: 0 0 0.65em;
}

.block-links-intro p:last-child {
    margin-bottom: 0;
}

.block-link-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.block-link-btn {
    min-width: 170px;
}

.text-link {
    color: inherit;
}

@media (max-width: 640px) {
    .block-link-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .block-link-btn {
        width: 100%;
    }
}