/* =====================================================
   Albo Pretorio — Design System v4
   Open, spacious, no boxes, modern editorial
   ===================================================== */

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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #eff6ff;
    --primary-subtle: #dbeafe;

    --bg: #ffffff;
    --bg-page: #ffffff;

    --text: #0a0a0a;
    --text-secondary: #525252;
    --text-tertiary: #a3a3a3;
    --text-on-dark: #fafafa;

    --border: #e5e5e5;
    --border-light: #f5f5f5;

    --success: #16a34a;
    --success-bg: #f0fdf4;
    --error: #dc2626;
    --error-bg: #fef2f2;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;

    --ease: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-page);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--primary); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--primary-dark); }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}


/* =====================================================
   Navbar — Minimal top bar
   ===================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.0625rem;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: -0.03em;
}
.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: #fff;
    border-radius: 8px;
    font-size: 0.625rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}
.navbar-links {
    display: flex;
    align-items: center;
    gap: 0;
}
.navbar-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color var(--ease);
    position: relative;
}
.navbar-links a:hover {
    color: var(--text);
}
.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform var(--ease);
}
.navbar-links a:hover::after {
    transform: scaleX(1);
}


/* =====================================================
   Footer — Clean, minimal
   ===================================================== */
.footer {
    margin-top: auto;
    padding: 3rem 0;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}
.footer::before {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background: var(--border);
    margin: 0 auto 1.5rem;
}


/* =====================================================
   Homepage — Hero: Full-width gradient banner
   ===================================================== */
.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #2563eb 100%);
    margin: 0 -2rem;
    padding: 5rem 2rem 4.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99,102,241,0.15) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 80% 50%, rgba(37,99,235,0.1) 0%, transparent 70%);
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    margin-bottom: 1.75rem;
    letter-spacing: 0.03em;
}
.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: #34d399;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 1.25rem;
    color: #fff;
}
.hero h1 span {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p {
    color: rgba(255,255,255,0.6);
    font-size: 1.125rem;
    line-height: 1.7;
    max-width: 540px;
    margin: 0 auto;
}


/* =====================================================
   Homepage — Comuni Section: Open layout, no cards
   ===================================================== */
.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}
.section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
}
.section-count {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}
.comuni-grid {
    padding: 3rem 0;
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

.card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 0;
    text-decoration: none;
    color: var(--text);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--ease);
    gap: 2rem;
}
.card:hover {
    padding-left: 1rem;
}
.card-body {
    flex: 1;
    min-width: 0;
}
.card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 0.125rem;
    letter-spacing: -0.02em;
    transition: color var(--ease);
}
.card:hover h3 {
    color: var(--primary);
}
.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}
.card-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-shrink: 0;
}
.card-action {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.375rem;
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--ease);
}
.card:hover .card-action {
    opacity: 1;
    transform: translateX(0);
}
.card-action svg {
    width: 16px;
    height: 16px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    border: 1px solid var(--border);
}
.badge-success { color: var(--success); border-color: #bbf7d0; background: var(--success-bg); }
.badge-muted { color: var(--text-tertiary); }

.empty-state {
    text-align: center;
    padding: 5rem 2rem;
    color: var(--text-tertiary);
}
.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.0625rem;
}


/* =====================================================
   Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--ease);
    white-space: nowrap;
}
.btn:hover {
    border-color: var(--text-tertiary);
}
.btn-primary {
    background: var(--text);
    color: #fff;
    border-color: var(--text);
}
.btn-primary:hover {
    background: #262626;
    color: #fff;
}
.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}


/* =====================================================
   Chat — Full-screen, clean
   ===================================================== */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 65px);
    max-width: 780px;
    margin: 0 auto;
    padding: 0 2rem;
}

.chat-header {
    text-align: center;
    padding: 2rem 0 1.25rem;
    flex-shrink: 0;
}
.chat-header-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}
.chat-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.25rem;
}
.chat-header p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 3px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 100px; }

.message { display: flex; max-width: 80%; }
.message.user { align-self: flex-end; }
.message.assistant { align-self: flex-start; }

.message-content {
    padding: 0.875rem 1.125rem;
    font-size: 0.9375rem;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}
.message.user .message-content {
    background: linear-gradient(135deg, #0f172a, #1e3a5f);
    color: #fff;
    border-radius: 20px 20px 4px 20px;
}
.message.assistant .message-content {
    background: #f5f5f5;
    color: var(--text);
    border-radius: 20px 20px 20px 4px;
}

.message-sources {
    align-self: flex-start;
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-left: 3px solid var(--primary);
    background: var(--primary-light);
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.message-sources strong {
    color: var(--primary-dark);
    font-weight: 700;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.message-sources ul { margin: 0.375rem 0 0 1.25rem; }
.message-sources li { margin-bottom: 0.25rem; }

/* Typing */
.typing-indicator {
    display: inline-flex;
    gap: 5px;
    padding: 4px 0;
    align-items: center;
}
.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: typing 1.4s ease-in-out infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing {
    0%, 60%, 100% { opacity: 0.2; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-5px); }
}

/* Categorie inline grid */
.categorie-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0 1rem;
    align-self: flex-start;
    max-width: 90%;
}
.categoria-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--ease);
    white-space: nowrap;
}
.categoria-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}
.categoria-all {
    font-weight: 700;
    color: var(--text);
}
.categoria-selected {
    background: var(--text) !important;
    color: #fff !important;
    border-color: var(--text) !important;
    cursor: default;
}
.categoria-disabled {
    opacity: 0.35;
    cursor: default;
    pointer-events: none;
}

/* Filters (hidden) */
.chat-filters {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 0;
    flex-shrink: 0;
    border-top: 1px solid var(--border-light);
}
.chat-filters select,
.chat-filters input[type="number"] {
    padding: 0.4375rem 0.75rem;
    border: 1px solid var(--border);
    font-family: var(--font);
    font-size: 0.8125rem;
    background: var(--bg);
    color: var(--text-secondary);
    outline: none;
    transition: border-color var(--ease);
}
.chat-filters select { flex: 1; }
.chat-filters input[type="number"] { width: 90px; }
.chat-filters select:focus,
.chat-filters input:focus { border-color: var(--primary); }

/* Input */
.chat-input {
    display: flex;
    gap: 0;
    padding: 0 0 1.5rem;
    flex-shrink: 0;
    border: 1px solid var(--border);
    border-radius: 0;
    overflow: hidden;
}
.chat-input input[type="text"] {
    flex: 1;
    padding: 0.875rem 1.125rem;
    border: none;
    font-family: var(--font);
    font-size: 0.9375rem;
    outline: none;
    background: var(--bg);
}
.chat-input input[type="text"]::placeholder { color: var(--text-tertiary); }

.chat-input button {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.875rem 1.5rem;
    background: var(--text);
    color: #fff;
    border: none;
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--ease);
    white-space: nowrap;
}
.chat-input button svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}
.chat-input button:hover { background: #262626; }
.chat-input button:disabled { opacity: 0.3; cursor: not-allowed; }


/* =====================================================
   Admin Panel — Open, flat
   ===================================================== */
.page-header {
    padding: 2.5rem 0 1.5rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}
.page-header h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.admin-section {
    padding: 0 0 2.5rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-light);
}
.admin-section:last-child {
    border-bottom: none;
}
.admin-section h2 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-icon {
    display: none;
}

/* Form */
.admin-form .form-row {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.25rem;
}
.admin-form .form-group { flex: 1; }
.admin-form label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}
.admin-form input,
.admin-form select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    font-family: var(--font);
    font-size: 0.875rem;
    background: var(--bg);
    color: var(--text);
    outline: none;
    transition: border-color var(--ease);
}
.admin-form input:focus,
.admin-form select:focus {
    border-color: var(--text);
}
.admin-form input::placeholder { color: var(--text-tertiary); }

/* Table */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}
.admin-table th {
    padding: 0.875rem 0;
    text-align: left;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    border-bottom: 2px solid var(--text);
}
.admin-table td {
    padding: 1rem 0;
    padding-right: 1rem;
    text-align: left;
    font-size: 0.9375rem;
    border-bottom: 1px solid var(--border-light);
    vertical-align: middle;
}
.admin-table tbody tr {
    transition: opacity var(--ease);
}
.admin-table tbody tr:hover {
    opacity: 0.7;
}
.admin-table code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border-top: 2px solid var(--text);
    border-bottom: 1px solid var(--border);
}
.stat-card {
    padding: 1.5rem 0;
    text-align: left;
    border-right: 1px solid var(--border);
    padding-right: 1.5rem;
    padding-left: 0.5rem;
}
.stat-card:last-child { border-right: none; }
.stat-card:first-child { padding-left: 0; }
.stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--text);
    line-height: 1;
}
.stat-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
}

/* Log */
.log-area {
    background: #0a0a0a;
    color: #a3a3a3;
    padding: 1.25rem 1.5rem;
    max-height: 260px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    border-left: 3px solid var(--primary);
}
.log-area::-webkit-scrollbar { width: 4px; }
.log-area::-webkit-scrollbar-thumb { background: #333; }
.log-area p { margin-bottom: 0.125rem; }
.log-empty { color: #525252; font-style: italic; }
.log-success { color: #34d399; }
.log-error { color: #f87171; }
.log-info { color: #93c5fd; }

/* Alert */
.alert {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    margin-top: 1rem;
    border-left: 3px solid;
}
.alert-success { border-color: var(--success); color: var(--success); background: var(--success-bg); }
.alert-error { border-color: var(--error); color: var(--error); background: var(--error-bg); }


/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 768px) {
    .container { padding: 0 1.25rem; }
    .hero { margin: 0 -1.25rem; padding: 3.5rem 1.25rem 3rem; }
    .hero h1 { font-size: 2.25rem; }
    .hero p { font-size: 1rem; }
    .admin-form .form-row { flex-direction: column; gap: 1rem; }
    .chat-filters { flex-direction: column; }
    .chat-filters input[type="number"] { width: 100%; }
    .message { max-width: 90%; }
    .chat-container { padding: 0 1.25rem; }
    .page-header h1 { font-size: 1.5rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-card { padding: 1rem 0.5rem; }
    .stat-value { font-size: 1.75rem; }
    .card { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
    .card-right { width: 100%; justify-content: space-between; }
    .card-action { opacity: 1; transform: none; }
}

@media (max-width: 480px) {
    .navbar .container { height: 56px; }
    .navbar-brand { font-size: 0.9375rem; }
    .brand-icon { width: 26px; height: 26px; font-size: 0.5625rem; }
    .hero h1 { font-size: 1.875rem; }
    .hero { padding: 2.5rem 1.25rem 2rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}