/* ON-writing student surface */
:root {
    --writing-bg: #fffaf2;
    --writing-card: rgba(255, 255, 255, 0.92);
    --writing-soft: #f2fbff;
    --writing-line: #d8e5f2;
    --writing-text: #17324d;
    --writing-muted: #6b8199;
    --writing-primary: #2563eb;
    --writing-primary-2: #5965f3;
    --writing-green: #0f9f7f;
    --writing-orange: #f59e0b;
    --writing-red: #ef4444;
    --writing-cream: #fff8e8;
    --writing-radius: 8px;
    --writing-shadow: 0 18px 45px rgba(37, 99, 235, 0.08);
    --safe-bottom: env(safe-area-inset-bottom, 20px);
}

* {
    box-sizing: border-box;
}

body.writing-student-page {
    margin: 0;
    min-height: 100vh;
    padding: 0 0 calc(104px + var(--safe-bottom)) 0;
    background:
        radial-gradient(circle at 14% 0%, #ffe8bd 0, #fffaf2 28%, #f3fbff 80%);
    color: var(--writing-text);
    font-family: 'Pretendard', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

.writing-student-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 0 22px;
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid var(--writing-line);
    box-shadow: 0 10px 28px rgba(20, 39, 70, 0.06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.student-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: 0;
    background: transparent;
    color: var(--writing-text);
    font-size: 1.22rem;
    font-weight: 900;
    padding: 0;
}

.student-user-pill,
#myName {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 36px;
    padding: 0 14px;
    border: 1px solid var(--writing-line);
    border-radius: 999px;
    background: #fff;
    color: var(--writing-primary);
    font-size: 0.88rem;
    font-weight: 850;
    white-space: nowrap;
}

.student-user-pill::before,
#myName::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--writing-orange);
}

.writing-student-wrap {
    width: min(1180px, 94vw);
    margin: 26px auto 0;
    padding-bottom: 20px;
}

.writing-stepper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 18px;
    padding: 14px 18px;
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    background: rgba(255, 255, 255, 0.76);
    box-shadow: var(--writing-shadow);
}

.writing-step {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--writing-muted);
    font-size: 0.88rem;
    font-weight: 900;
    white-space: nowrap;
}

.writing-step-num {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: #e8eef7;
}

.writing-step.active {
    color: var(--writing-green);
}

.writing-step.active .writing-step-num {
    background: var(--writing-green);
    color: #fff;
}

.writing-step-line {
    flex: 1;
    height: 2px;
    background: #dce6f3;
}

.writing-grid {
    display: grid;
    grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    min-height: 0;
}

.writing-left-rail,
.coach-card {
    display: grid;
    gap: 16px;
    min-height: 0;
}

.writing-card {
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    background: var(--writing-card);
    box-shadow: var(--writing-shadow);
}

.topic-card,
.helper-card,
.memo-card,
.coach-card,
.editor-card,
.no-topic-card,
.done-card {
    padding: 20px;
}

.topic-badge {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    margin-bottom: 12px;
    padding: 0 10px;
    border-radius: 999px;
    background: #fff1d6;
    color: #d98200;
    font-size: 0.76rem;
    font-weight: 950;
}

.topic-title {
    margin: 0 0 12px;
    color: var(--writing-text);
    font-size: 1.38rem;
    line-height: 1.35;
    word-break: keep-all;
}

.topic-desc {
    margin: 0;
    color: var(--writing-muted);
    font-size: 0.94rem;
    line-height: 1.7;
}

.topic-desc p,
.topic-desc ul,
.topic-desc ol {
    margin-top: 0;
    margin-bottom: 10px;
}

.topic-desc :last-child {
    margin-bottom: 0;
}

.helper-card {
    display: grid;
    gap: 10px;
}

.helper-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--writing-green);
    font-weight: 900;
    text-align: left;
}

.helper-content {
    display: none;
    color: #35516f;
    font-size: 0.9rem;
    line-height: 1.58;
}

.helper-content.open {
    display: grid;
    gap: 8px;
}

.helper-content p,
.helper-content ul,
.helper-content ol {
    margin-top: 0;
    margin-bottom: 8px;
}

.memo-card h3,
.history-panel h3 {
    margin: 0 0 10px;
    color: var(--writing-green);
    font-size: 1rem;
}

.memo-card textarea {
    width: 100%;
    height: 120px;
    resize: none;
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    padding: 12px;
    outline: none;
    line-height: 1.6;
    color: var(--writing-text);
    background: #fff;
}

.memo-card textarea:focus {
    border-color: var(--writing-primary);
}

.editor-card {
    padding: 0;
    overflow: hidden;
}

.editor-card-head {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--writing-line);
    background: #f8fafc;
}

.editor-eyebrow {
    color: var(--writing-green);
    font-size: 0.76rem;
    font-weight: 900;
}

.editor-card-head h2 {
    margin: 4px 0 0;
    color: var(--writing-text);
    font-size: 1rem;
    line-height: 1.35;
}

.editor-status {
    min-width: max-content;
    color: var(--writing-muted);
    font-size: 0.82rem;
    font-weight: 800;
}

#editorContainer {
    background: #fff;
}

.toastui-editor-defaultUI {
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
}

.toastui-editor-toolbar {
    background: #f8fafc !important;
    border-bottom: 1px solid var(--writing-line) !important;
}

.toastui-editor-toolbar button {
    border-radius: var(--writing-radius) !important;
}

.toastui-editor-main,
.toastui-editor-md-container,
.toastui-editor-ww-container {
    background: #fff !important;
}

.toastui-editor-contents {
    color: var(--writing-text) !important;
    font-size: 1.06rem !important;
    line-height: 1.9 !important;
}

.editor-foot {
    min-height: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 16px;
    border-top: 1px solid var(--writing-line);
    background: #fbfdff;
    color: var(--writing-muted);
    font-size: 0.82rem;
}

.coach-card {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.85fr);
    align-items: start;
    gap: 16px;
}

.ai-eval-box {
    display: grid;
    gap: 14px;
}

.coach-card .ai-eval-box {
    grid-row: span 2;
}

.ai-eval-head {
    display: grid;
    gap: 12px;
}

.ai-eval-title {
    margin-bottom: 4px;
    color: var(--writing-green);
    font-size: 1rem;
    font-weight: 900;
}

.ai-eval-meta,
.ai-eval-summary,
.ai-eval-status,
.ai-eval-history {
    color: var(--writing-muted);
    font-size: 0.86rem;
    line-height: 1.55;
}

.ai-eval-score-row {
    display: grid;
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
}

.ai-eval-score {
    width: 78px;
    min-height: 78px;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 3px;
    border-radius: var(--writing-radius);
    background: var(--writing-green);
    color: #fff;
}

.ai-eval-score span {
    font-size: 1.9rem;
    font-weight: 950;
}

.ai-eval-score small {
    font-weight: 900;
}

.ai-eval-level {
    margin-bottom: 6px;
    color: var(--writing-text);
    font-size: 1.02rem;
    font-weight: 900;
}

.ai-eval-section-title {
    margin: 2px 0 8px;
    color: var(--writing-text);
    font-size: 0.9rem;
    font-weight: 900;
}

.ai-eval-help-list {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.ai-eval-help-list li,
.writing-tip {
    padding: 11px;
    border: 1px solid #f7d99b;
    border-left: 5px solid var(--writing-orange);
    border-radius: var(--writing-radius);
    background: var(--writing-cream);
    color: #8a4d0b;
    font-size: 0.88rem;
    line-height: 1.45;
}

.ai-eval-revision-title {
    margin-top: 10px;
}

.ai-eval-revision {
    display: grid;
    gap: 10px;
}

.ai-eval-revision-direction {
    padding: 12px;
    border: 1px solid #bbf7d0;
    border-left: 5px solid var(--writing-green);
    border-radius: var(--writing-radius);
    background: #f0fdf4;
    color: #14532d;
    font-size: 0.88rem;
    font-weight: 800;
    line-height: 1.5;
}

.ai-eval-revision-steps {
    display: grid;
    gap: 7px;
    margin: 0;
    padding-left: 22px;
    color: var(--writing-text);
    font-size: 0.84rem;
    line-height: 1.5;
}

.ai-eval-revision-ideas {
    display: grid;
    gap: 8px;
}

.ai-eval-revision-idea {
    display: grid;
    gap: 4px;
    padding: 10px;
    border: 1px solid #bfdbfe;
    border-radius: var(--writing-radius);
    background: #eff6ff;
    color: #1e3a8a;
    font-size: 0.83rem;
    line-height: 1.45;
}

.ai-eval-revision-idea b {
    color: #1d4ed8;
}

.ai-eval-revision-idea small {
    color: #475569;
    font-size: 0.78rem;
}

.ai-eval-revision-examples {
    display: grid;
    gap: 6px;
    padding: 10px;
    border-radius: var(--writing-radius);
    background: #f8fafc;
    color: #334155;
}

.ai-eval-revision-examples span {
    color: #0f766e;
    font-size: 0.73rem;
    font-weight: 900;
}

.ai-eval-revision-examples p {
    margin: 0;
    font-size: 0.82rem;
    line-height: 1.45;
}

.ai-eval-sentence-title {
    margin-top: 6px;
}

.ai-eval-sentences {
    display: grid;
    gap: 9px;
}

.ai-eval-sentence {
    display: grid;
    gap: 7px;
    padding: 11px;
    border: 1px solid var(--writing-line);
    border-left: 5px solid var(--writing-green);
    border-radius: var(--writing-radius);
    background: #f8fbff;
}

.ai-eval-sentence-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    color: var(--writing-green);
    font-size: 0.76rem;
    font-weight: 950;
}

.ai-eval-sentence-original {
    color: var(--writing-text);
    font-size: 0.86rem;
    font-weight: 850;
    line-height: 1.45;
}

.ai-eval-sentence-instruction {
    color: #0f7a5c;
    font-size: 0.84rem;
    line-height: 1.5;
}

.ai-eval-sentence-example {
    border-radius: 8px;
    background: #eef2ff;
    color: #3730a3;
    padding: 8px 10px;
    font-size: 0.83rem;
    line-height: 1.5;
}

.ai-eval-sentence-example-label {
    display: block;
    margin-bottom: 4px;
    color: #4338ca;
    font-size: 0.72rem;
    font-weight: 800;
}

.ai-eval-sentence-reason {
    color: var(--writing-muted);
    font-size: 0.78rem;
    line-height: 1.45;
}

.ai-eval-traits,
.ai-eval-groups {
    display: none;
    gap: 8px;
}

.ai-eval-traits.open,
.ai-eval-groups.open {
    display: grid;
}

.ai-eval-trait {
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    background: #f8fbff;
    padding: 10px;
}

.ai-eval-trait-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    color: var(--writing-text);
    font-size: 0.82rem;
    font-weight: 900;
}

.ai-eval-trait-score {
    color: var(--writing-green);
    white-space: nowrap;
}

.ai-eval-trait-comment {
    margin-top: 6px;
    color: var(--writing-muted);
    font-size: 0.8rem;
    line-height: 1.45;
}

.ai-eval-group {
    border-left: 4px solid var(--writing-green);
    border-radius: var(--writing-radius);
    background: rgba(255, 255, 255, 0.8);
    padding: 9px 10px;
}

.ai-eval-group-title {
    margin-bottom: 4px;
    color: var(--writing-text);
    font-size: 0.78rem;
    font-weight: 900;
}

.ai-eval-group-body {
    color: var(--writing-muted);
    font-size: 0.82rem;
    line-height: 1.5;
}

.ai-eval-history {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.ai-eval-history-chip {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 9px;
    border: 1px solid var(--writing-line);
    border-radius: 999px;
    background: #fff;
    color: var(--writing-muted);
    font-size: 0.76rem;
    font-weight: 800;
}

.history-panel {
    border-top: 1px solid var(--writing-line);
    padding-top: 14px;
}

.history-grid {
    display: grid;
    gap: 8px;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    background: #fff;
    cursor: pointer;
}

.history-item:hover {
    border-color: var(--writing-primary);
}

.hist-info {
    min-width: 0;
}

.hist-title {
    color: var(--writing-text);
    font-size: 0.88rem;
    font-weight: 850;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hist-date,
.history-loading {
    color: var(--writing-muted);
    font-size: 0.76rem;
}

.hist-badge {
    min-width: max-content;
    padding: 5px 8px;
    border-radius: 999px;
    background: var(--writing-soft);
    color: var(--writing-primary);
    font-size: 0.72rem;
    font-weight: 900;
}

.hist-badge.feedback {
    background: #fff1d6;
    color: #b45309;
}

.hist-badge.draft {
    background: #f1f5f9;
    color: #64748b;
}

.feedback-box {
    border-top: 1px solid var(--writing-line);
    padding-top: 14px;
}

.fb-title {
    margin-bottom: 8px;
    color: #b45309;
    font-weight: 900;
}

.fb-text {
    border-radius: var(--writing-radius);
    background: var(--writing-cream);
    padding: 12px;
    color: #78350f;
    font-size: 0.9rem;
    line-height: 1.6;
}

.spell-panel {
    margin: 16px 18px 0;
    padding: 14px;
    border: 1px solid var(--writing-orange);
    border-radius: var(--writing-radius);
    background: #fff;
}

.spell-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
    font-weight: 900;
}

.spell-header small {
    color: var(--writing-muted);
    font-weight: 700;
}

.spell-result-list {
    display: grid;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.9rem;
}

.writing-ocr-panel {
    display: grid;
    gap: 10px;
}

.writing-ocr-result {
    width: 100%;
    min-height: 140px;
    resize: vertical;
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    padding: 12px;
    color: var(--writing-text);
    background: #fff;
    font: inherit;
    line-height: 1.6;
}

.writing-ocr-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

.spell-item {
    border: 1px solid #fef3c7;
    border-radius: var(--writing-radius);
    background: #fffaf2;
    padding: 10px;
}

.spell-wrong {
    color: var(--writing-red);
    text-decoration: line-through;
    font-weight: 900;
}

.spell-right {
    color: #059669;
    font-weight: 900;
}

.spell-desc {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed #f3d591;
    color: var(--writing-muted);
    font-size: 0.8rem;
}

.writing-bottom-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 110;
    border-top: 1px solid var(--writing-line);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.writing-bottom-inner {
    width: min(1180px, 94vw);
    min-height: calc(78px + var(--safe-bottom));
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
    align-items: center;
    margin: 0 auto;
    padding: 10px 0 calc(10px + var(--safe-bottom));
}

.btn {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--writing-line);
    border-radius: var(--writing-radius);
    background: #fff;
    color: var(--writing-text);
    font-weight: 900;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(20, 39, 70, 0.05);
}

.btn.small {
    min-height: 32px;
    padding: 0 10px;
    font-size: 0.82rem;
}

.btn.primary {
    border-color: transparent;
    background: linear-gradient(135deg, var(--writing-primary), var(--writing-primary-2));
    color: #fff;
}

.btn.green {
    border-color: transparent;
    background: linear-gradient(135deg, #10b981, var(--writing-green));
    color: #fff;
}

.btn.detail-toggle {
    width: 100%;
    min-height: 40px;
    box-shadow: none;
}

.btn:active {
    transform: scale(0.98);
}

.done-card,
.no-topic-card {
    text-align: center;
    padding: 40px 20px;
}

.done-icon {
    margin-bottom: 16px;
    font-size: 4rem;
}

.done-card h2,
.no-topic-card h3 {
    margin: 0 0 10px;
}

.done-card p,
.no-topic-card p {
    margin: 0 0 24px;
    color: var(--writing-muted);
    line-height: 1.6;
}

.done-actions {
    display: grid;
    gap: 12px;
    width: min(360px, 100%);
    margin: 0 auto;
}

#loadingOverlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    color: var(--writing-primary);
    font-weight: 900;
}

.hidden {
    display: none !important;
}

@media (max-width: 1080px) {
    .writing-grid {
        grid-template-columns: 1fr;
    }

    .coach-card {
        position: static;
        max-height: none;
        overflow: visible;
        grid-template-columns: 1fr;
    }

    .writing-bottom-inner {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    body.writing-student-page {
        padding-bottom: calc(152px + var(--safe-bottom));
    }

    .writing-bottom-inner {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    body.writing-student-page {
        padding-bottom: calc(224px + var(--safe-bottom));
    }

    .writing-student-header {
        padding: 0 14px;
    }

    .student-brand {
        font-size: 1rem;
    }

    .writing-student-wrap {
        width: min(100% - 24px, 1180px);
        margin-top: 16px;
    }

    .writing-stepper {
        display: none;
    }

    .topic-card,
    .helper-card,
    .memo-card,
    .coach-card,
    .editor-card,
    .no-topic-card,
    .done-card {
        padding: 16px;
    }

    .editor-card {
        padding: 0;
    }

    .editor-card-head,
    .editor-foot,
    .ai-eval-score-row {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .editor-card-head,
    .editor-foot {
        flex-direction: column;
    }

    .writing-bottom-inner {
        min-height: auto;
        grid-template-columns: 1fr 1fr;
        padding: 10px 0 calc(10px + var(--safe-bottom));
    }

    #btnSubmit {
        grid-column: 1 / -1;
    }
}