/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --accent: #5b5bf5;
    --accent-light: #818cf8;
    --accent-soft: #eef0ff;
    --bg: #fafbfc;
    --surface: #ffffff;
    --border: #e4e7eb;
    --border-strong: #d4d8dd;
    --text: #0c0e16;
    --text-muted: #6b7280;
    --text-light: #9aa1ac;
    --green: #10b981;
    --green-soft: #d1fae5;
    --orange: #f59e0b;
    --orange-soft: #fef3c7;
    --blue: #3b82f6;
    --blue-soft: #dbeafe;
    --red: #ef4444;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
    --shadow-md: 0 4px 16px rgba(16, 24, 40, 0.08);
    --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.12);
    --radius: 8px;
    --radius-sm: 6px;
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

/* ========== Workspace ========== */
.workspace {
    display: flex;
    gap: 20px;
    padding: 16px 20px;
    align-items: flex-start;
}

.panel {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px 22px;
    box-shadow: var(--shadow-sm);
    flex: 1;
    border: 1px solid var(--border);
}

.panel-input { min-width: 380px; max-width: 440px; }

.panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.panel-header h3 {
    font-size: 15px;
    color: var(--text);
    font-weight: 700;
}

.panel-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.5;
}

/* ========== Form Elements ========== */
textarea, input[type=text], input[type=number] {
    width: 100%;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-size: 13px;
    font-family: var(--font);
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fafbfc;
}

textarea:focus, input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(91, 91, 245, 0.12);
    background: #fff;
}

#raw-input { min-height: 200px; font-size: 12px; line-height: 1.6; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
    font-family: var(--font);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    margin-top: 8px;
    width: 100%;
    justify-content: center;
}

.btn-primary:hover { background: #4f46e5; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3); }

.btn-generate {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    width: 100%;
    padding: 13px;
    font-size: 15px;
    margin-top: 12px;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.btn-generate:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35); }

.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    margin-top: 6px;
}

.btn-sm:hover { background: var(--accent-soft); border-color: var(--accent-light); }

.status {
    display: inline-block;
    margin-left: 10px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ========== Upload Area ========== */
.upload-area { margin-bottom: 14px; }

.upload-zone {
    border: 2px dashed #cbd5e1;
    border-radius: var(--radius);
    padding: 22px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: #fafbfc;
}

.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.upload-icon { font-size: 28px; margin-bottom: 2px; }
.upload-hint { font-size: 12px; color: var(--text-muted); }

.btn-link {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: inherit;
    text-decoration: underline;
    padding: 0;
    font-weight: 600;
}

.or-divider {
    display: flex;
    align-items: center;
    margin: 12px 0;
    color: var(--text-muted);
    font-size: 12px;
}
.or-divider::before, .or-divider::after {
    content: "";
    flex: 1;
    border-top: 1px solid var(--border);
}
.or-divider span { padding: 0 12px; }

#file-info {
    background: var(--green-soft);
    border: 1px solid #a7f3d0;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-size: 12px;
    color: #065f46;
    margin-top: 8px;
}
#file-info.error {
    background: #fee2e2;
    border-color: #fecaca;
    color: #991b1b;
}

/* ========== Form Sections ========== */
.form-section { margin-bottom: 14px; }

.form-section > label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 5px;
}

.required { color: var(--red); }
.hint { display: block; font-size: 11px; color: var(--text-muted); margin-top: 3px; }

/* ========== Author & Affiliation Cards ========== */
.author-card, .aff-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 11px 13px;
    margin-bottom: 8px;
    background: #fafbfc;
    position: relative;
    transition: box-shadow 0.15s;
}

.author-card:hover, .aff-card:hover { box-shadow: var(--shadow-md); }

.author-card .row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 5px;
}
.author-card .row:last-child { margin-bottom: 0; }

.author-card label, .aff-card label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    display: block;
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.author-card input {
    font-size: 12px;
    padding: 7px 9px;
}

.author-card input.name-input { width: 170px; }

.aff-card textarea {
    width: 100%;
    font-size: 12px;
    min-height: 55px;
    padding: 7px 9px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 5px;
    padding-top: 10px;
}
.checkbox-group input { width: auto; }
.checkbox-group label { margin-bottom: 0; font-size: 11px; }

.remove-btn {
    position: absolute;
    top: 4px;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    padding: 2px 4px;
    transition: color 0.15s;
}
.remove-btn:hover { color: var(--red); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .workspace { flex-direction: column; padding: 16px; }
    .panel-input { min-width: auto; max-width: none; }
}

@media (max-width: 700px) {
    body { flex-direction: column; }
}