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

:root {
    --bg: #f0f1f5;
    --bg-elevated: #ffffff;
    --surface: #ffffff;
    --surface-hover: #f7f8fa;
    --text: #1a1a2e;
    --text-muted: #5f6377;
    --text-dim: #9197a6;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.1);
    --success: #059669;
    --success-bg: rgba(5, 150, 105, 0.08);
    --error: #dc2626;
    --error-bg: rgba(220, 38, 38, 0.06);
    --border: #e0e2ea;
    --border-light: #d1d4de;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    letter-spacing: -0.01em;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Navbar ── */
.navbar {
    background: #1a1a2e;
    border-bottom: 1px solid #2a2d3e;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.nav-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: #818cf8;
    letter-spacing: -0.5px;
}

.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
    padding: 0.3rem 0;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #818cf8; border-bottom: 2px solid #6366f1; }
.nav-user { color: #94a3b8; font-size: 0.8rem; }
.nav-logout { color: var(--error) !important; }
.nav-logout:hover { color: #fca5a5 !important; }

/* ── Container ── */
.container {
    max-width: 820px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    flex: 1;
}

/* ── Login ── */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.login-card h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--primary-hover);
    margin-bottom: 0.25rem;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

/* ── Forms ── */
.form-group { margin-bottom: 1.15rem; text-align: left; }
.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.8rem;
    margin-bottom: 0.4rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-elevated);
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-dim);
}
.form-group textarea {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    resize: vertical;
}

.form-actions { display: flex; gap: 0.75rem; margin-top: 1.75rem; }

/* ── Buttons ── */
.btn {
    display: inline-block;
    padding: 0.65rem 1.35rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--surface);
    color: var(--text);
    line-height: 1.4;
}
.btn:hover { background: var(--surface-hover); border-color: var(--border-light); }
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 0 20px var(--primary-glow);
}
.btn-secondary { background: var(--bg-elevated); color: var(--text-muted); }
.btn-full { width: 100%; padding: 0.8rem; font-size: 0.95rem; }
.btn-small { padding: 0.3rem 0.75rem; font-size: 0.8rem; }
.btn-copy {
    background: var(--bg-elevated);
    border-color: var(--border);
    font-size: 0.75rem;
    white-space: nowrap;
    color: var(--text-muted);
}
.btn-copy:hover { color: var(--text); }

/* ── Delete button ── */
.delete-form { display: inline; margin-left: auto; }
.btn-delete {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    line-height: 1;
}
.btn-delete:hover {
    color: var(--error);
    background: var(--error-bg);
}

/* ── Flash messages ── */
.flash {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
}
.flash-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(52, 211, 153, 0.2);
}
.flash-error {
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid rgba(248, 113, 113, 0.2);
}

/* ── Feed ── */
.feed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}
.feed-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.empty-state {
    text-align: center;
    color: var(--text-dim);
    padding: 4rem 0;
    font-size: 0.95rem;
}

.day-group { margin-bottom: 2.5rem; }
.day-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
}

/* ── Entry card ── */
.entry-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    transition: border-color 0.2s;
}
.entry-card:hover {
    border-color: var(--border-light);
}

.entry-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 1rem;
}
.entry-time {
    font-weight: 700;
    color: var(--primary);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    background: var(--primary-glow);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
}
.entry-author { color: var(--text-muted); }

.entry-summary { margin-bottom: 1.25rem; }
.entry-summary p {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text);
}

.entry-points { margin-bottom: 1.25rem; }
.entry-points h3,
.entry-tweet h3 {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-dim);
    margin-bottom: 0.6rem;
}
.entry-points ul { padding-left: 1.25rem; }
.entry-points li {
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
    line-height: 1.6;
    color: var(--text);
}
.entry-points li::marker { color: var(--primary); }

.entry-tweet { margin-bottom: 0.75rem; }
.tweet-box {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}
.tweet-box p {
    flex: 1;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--text);
}

.entry-raw { margin-top: 1rem; }
.entry-raw summary {
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-dim);
    transition: color 0.2s;
}
.entry-raw summary:hover { color: var(--text-muted); }
.entry-raw pre {
    margin-top: 0.6rem;
    background: #1e293b;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 0.8rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    line-height: 1.5;
}

/* ── Pagination ── */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}
.page-info { font-size: 0.85rem; color: var(--text-dim); }

/* ── Footer ── */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-dim);
    font-size: 0.75rem;
    border-top: 1px solid var(--border);
}

.page-desc {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

/* ── Responsive ── */
@media (max-width: 640px) {
    .navbar { padding: 0.75rem 1rem; flex-direction: column; gap: 0.5rem; }
    .nav-links { flex-wrap: wrap; justify-content: center; gap: 0.75rem; }
    .container { padding: 1.25rem 1rem; }
    .feed-header { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
    .form-actions { flex-direction: column; }
    .tweet-box { flex-direction: column; }
    .login-card { padding: 2rem 1.5rem; margin: 0 1rem; }
}