:root {
    --bg: #fafafa;
    --card: #ffffff;
    --border: #e2e2e2;
    --text: #1a1a1a;
    --text-secondary: #666666;
    --accent: #0a66c2;
    --accent-light: #e8f0fe;
    --success: #057642;
    --success-light: #e6f4ed;
    --tag: #f3f2ef;
    --danger: #cc1016;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* Login Screen */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 500;
}
.login-card {
    text-align: center;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem 2.5rem;
    max-width: 380px;
    width: 90%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}
.login-card h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.25rem;
}
.login-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}
.login-btn {
    width: 100%;
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
}
.login-error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 1rem;
}

/* User Bar (header) */
.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}
.user-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.user-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 6px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    padding: 2rem 1rem;
}

.container { max-width: 900px; margin: 0 auto; }

/* Header */
header { margin-bottom: 2.5rem; }
header h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-generate {
    background: var(--accent);
    color: white;
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    border-radius: 6px;
    white-space: nowrap;
}
.btn-generate:hover { background: #084e96; }
.btn-generate:disabled { background: var(--border); cursor: not-allowed; color: var(--text-secondary); }
.btn-generate.generating {
    background: var(--accent-light);
    color: var(--accent);
    animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

header p { color: var(--text-secondary); font-size: 0.9rem; }

#dateSelect {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    background: var(--card);
    color: var(--text);
    cursor: pointer;
}
#dateSelect:focus { outline: none; border-color: var(--accent); }

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover { border-color: var(--accent); }
.card.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.card-number {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
}

.card-meta { display: flex; gap: 0.75rem; align-items: center; }

.word-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--tag);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}

.published-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--success);
    background: var(--success-light);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}

.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; }

.card-source {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.post-text {
    font-size: 0.95rem;
    line-height: 1.75;
    white-space: pre-wrap;
}

.card-hashtags {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.hashtag {
    font-size: 0.8rem;
    color: var(--accent);
    background: var(--accent-light);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: 500;
}

/* Radio indicator */
.radio-indicator {
    width: 20px; height: 20px;
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    transition: border-color 0.2s;
}
.card.selected .radio-indicator { border-color: var(--accent); }
.card.selected .radio-indicator::after {
    content: ''; width: 10px; height: 10px;
    background: var(--accent); border-radius: 50%;
}

/* Briefing */
.briefing {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    border-top: 0px solid var(--border);
}
.briefing.open {
    max-height: 2000px;
    border-top: 1px solid var(--border);
    padding-top: 1.25rem;
    margin-top: 1.25rem;
}
.briefing-toggle {
    display: inline-flex; align-items: center; gap: 0.4rem;
    margin-top: 1rem; padding: 0.4rem 0.8rem;
    background: var(--tag); border: none; border-radius: 6px;
    font-size: 0.8rem; color: var(--text-secondary);
    cursor: pointer; transition: background 0.2s;
}
.briefing-toggle:hover { background: var(--border); }
.briefing-toggle .arrow {
    transition: transform 0.3s; display: inline-block;
}
.briefing-toggle.open .arrow { transform: rotate(90deg); }
.briefing h4 {
    font-size: 0.85rem; font-weight: 600; color: var(--accent);
    margin: 0 0 0.5rem 0; text-transform: uppercase;
    letter-spacing: 0.03em;
}
.briefing h4:not(:first-child) { margin-top: 1.25rem; }
.briefing ul { list-style: none; padding: 0; margin: 0 0 0.25rem 0; }
.briefing li {
    font-size: 0.85rem; line-height: 1.6; padding: 0.2rem 0;
    padding-left: 1rem; position: relative;
}
.briefing li::before {
    content: '\2192'; position: absolute; left: 0;
    color: var(--accent); font-weight: 600;
}
.briefing a {
    color: var(--accent); text-decoration: none;
}
.briefing a:hover { text-decoration: underline; }
.briefing .counter-arg {
    background: var(--tag); border-radius: 6px;
    padding: 0.6rem 0.8rem; margin: 0.4rem 0;
    font-size: 0.85rem; line-height: 1.5;
}
.counter-arg strong { color: var(--text); }
.counter-arg .response { color: var(--text-secondary); }

/* Action buttons */
.actions {
    display: flex; gap: 0.75rem;
    margin-top: 2rem; flex-wrap: wrap;
}

.btn {
    padding: 0.7rem 1.5rem; border: none; border-radius: 8px;
    font-size: 0.9rem; font-weight: 600; cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #084e96; }
.btn-primary:disabled { background: var(--border); cursor: not-allowed; }
.btn-secondary { background: var(--tag); color: var(--text); }
.btn-secondary:hover { background: var(--border); }
.btn-mark-published { background: var(--tag); color: var(--text); border: 1px solid var(--border); }
.btn-mark-published:hover { background: var(--border); }
.btn-mark-published:disabled { background: var(--tag); cursor: not-allowed; color: var(--text-secondary); border-color: var(--tag); }
.btn-publish { background: var(--success); color: white; }
.btn-publish:hover { background: #045e35; }
.btn-publish:disabled { background: var(--border); cursor: not-allowed; color: var(--text-secondary); }

/* Toast */
.toast {
    position: fixed; bottom: 2rem; left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 0.75rem 1.5rem; border-radius: 8px;
    font-size: 0.9rem; font-weight: 500;
    opacity: 0; transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 200;
    color: white;
}
.toast.show {
    transform: translateX(-50%) translateY(0); opacity: 1;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 300;
    align-items: center; justify-content: center;
}
.modal-overlay.visible {
    display: flex;
}
.modal {
    background: var(--card);
    border-radius: 12px;
    padding: 2rem;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}
.modal h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}
.modal p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}
.modal-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

/* Loading state */
.loading {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Error state */
.error-message {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--danger);
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 600px) {
    body { padding: 1rem 0.75rem; }
    .card { padding: 1.25rem; }
    .actions { flex-direction: column; }
    .btn { width: 100%; text-align: center; }
    .header-top { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .header-controls { flex-direction: column; align-items: flex-start; }
    .header-actions { width: 100%; flex-direction: column; }
    .btn-generate { width: 100%; text-align: center; }
    .modal-actions { flex-direction: column; }
    .modal-actions .btn { width: 100%; text-align: center; }
    .user-bar { width: 100%; justify-content: space-between; }
}