/* Rephraser Specific Styles */
:root {
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --surface: rgba(255, 255, 255, 0.88);
    --glass-border: rgba(255, 255, 255, 0.45);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #4f46e5;
    --primary-glow: rgba(79, 70, 229, 0.22);
    --accent: #38bdf8;
    --success: #10b981;
    --danger: #ef4444;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --input-bg: #fff;
    --input-border: #cbd5e1;
    --focus-ring: rgba(79, 70, 229, 0.2);

    --mark-bg: #fef08a; /* yellow-200 for highlighting replaced words */
    --mark-text: #854d0e; /* yellow-800 */
}

body.dark-mode {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --surface: rgba(30, 41, 59, 0.82);
    --glass-border: rgba(255, 255, 255, 0.06);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.22);
    --card-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.55);
    --input-bg: #0f172a;
    --input-border: #334155;
    --focus-ring: rgba(99, 102, 241, 0.25);

    --mark-bg: rgba(250, 204, 21, 0.25);
    --mark-text: #fde047;
}

main {
    flex: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px 60px;
    width: 100%;
    animation: fadeUp 0.45s ease-out;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Hero ── */
.page-hero {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    gap: 16px;
    flex-wrap: wrap;
}

h1 {
    font-size: 2.3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.15;
    margin-bottom: 6px;
}

.hero-sub {
    color: var(--text-muted);
    font-size: 0.97rem;
    font-weight: 400;
}

/* ── Theme Toggle ── */
.theme-toggle {
    flex-shrink: 0;
    background: var(--surface);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(10px);
    box-shadow: var(--card-shadow);
    transition: all 0.25s;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

/* ── Forms/Inputs ── */
.card {
    background: var(--surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    margin-bottom: 24px;
    transition: box-shadow 0.3s;
}

label {
    display: block;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 12px;
    color: var(--text-main);
}

textarea {
    width: 100%;
    color: var(--text-main);
    background: var(--input-bg);
    border: 2px solid var(--input-border);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    resize: vertical;
    min-height: 120px;
    max-height: 350px;
}

textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--focus-ring);
}

/* ── Buttons ── */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-top: 16px;
    padding: 16px 24px;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
    color: #fff;
    box-shadow: 0 4px 15px var(--primary-glow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#status {
    display: block;
    text-align: center;
    margin-top: 16px;
    font-weight: 600;
    color: var(--danger);
    min-height: 1.5rem;
}

/* ── Outputs Area ── */
.outputs-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
    margin: 30px 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--glass-border);
}

#outputs-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    margin-bottom: 16px;
}

#outputs-table th {
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary);
    padding: 14px 16px;
    text-align: left;
    font-weight: 800;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--glass-border);
}

#outputs-table td {
    padding: 16px;
    border-bottom: 1px solid var(--glass-border);
    vertical-align: top;
    color: var(--text-main);
}

#outputs-table tr:last-child td { border-bottom: none; }
#outputs-table tbody tr { transition: background 0.2s; }
#outputs-table tbody tr:hover { background: rgba(148, 163, 184, 0.1); }
body.dark-mode #outputs-table tbody tr:hover { background: rgba(30, 41, 59, 0.4); }

#outputs-table pre {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: 'Inter', sans-serif;
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-main);
    max-height: 200px;
    overflow-y: auto;
}

.btn-copy {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}

.btn-copy:hover {
    border-color: var(--success);
    color: var(--success);
}

.btn-copy.copied-state {
    background: var(--success) !important;
    color: white !important;
    border-color: var(--success) !important;
}

mark {
    background: var(--mark-bg);
    color: var(--mark-text);
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
}

/* ── Definition Card ── */
.definitions-card {
    background: var(--surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 35px;
    box-shadow: var(--card-shadow);
    margin-top: 40px;
}

.definitions-card h2 {
    margin: 0 0 6px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
}

.definitions-card .card-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0 0 24px;
    line-height: 1.6;
}

.def-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.def-item {
    display: flex;
    gap: 16px;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 20px;
    transition: transform 0.2s ease;
}

body.dark-mode .def-item { background: rgba(30, 41, 59, 0.4); }
.def-item:hover { transform: translateX(4px); box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05); }

.def-badge {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    font-size: 1.5rem;
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary);
}

body.dark-mode .def-badge { background: rgba(99, 102, 241, 0.25); color: #818cf8; }

.def-text {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.def-text strong {
    display: block;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
}

.def-text span {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .page-hero { flex-direction: column; }
    .definitions-card { padding: 20px; border-radius: 16px; }
    .def-item { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px; }
    .def-badge { width: 44px; height: 44px; font-size: 1.2rem; }
}