/* ============================================================
   Plataforma APPCC — Estilos Globales
   Inter-based minimal design system for food safety traceability
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

/* --- Design tokens --- */
:root {
    --primary: #0a0a0a;
    --primary-hover: #333333;
    --success: #16a34a;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --danger: #b91c1c;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --info-bg: #eff6ff;
    --info-color: #1d4ed8;
    --info-border: #bfdbfe;
    --text: #0a0a0a;
    --text-secondary: #6b6b6b;
    --bg: #ffffff;
    --bg-light: #fafafa;
    --bg-hover: #f5f5f5;
    --border: #e0e0e0;
    --border-light: #f0f0f0;
    --radius: 2px;
    --sidebar-width: 240px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: 0.15s ease;
}

/* --- Base --- */
html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition);
}

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

/* --- Login --- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-light);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.login-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-header h1 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 0.35rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
}

.login-form .form-group:last-of-type {
    margin-bottom: 1.75rem;
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    transition: border-color var(--transition);
    line-height: 1.5;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--text);
    box-shadow: none;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check label {
    margin-bottom: 0;
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.85rem;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.5rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 0.7rem;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition);
    gap: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    line-height: 1.5;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-light);
    border-color: var(--text-secondary);
}

.btn-danger {
    background: var(--danger);
    color: #ffffff;
    border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background: #991b1b;
    border-color: #991b1b;
}

.btn-success {
    background: var(--success);
    color: #ffffff;
    border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
    background: #15803d;
    border-color: #15803d;
}

.btn-sm {
    padding: 0.3rem 0.7rem;
    font-size: 0.65rem;
}

.btn-block {
    width: 100%;
}

/* --- Alerts --- */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    border: 1px solid;
    line-height: 1.5;
}

.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger-border);
}

.alert-success {
    background: var(--success-bg);
    color: #15803d;
    border-color: var(--success-border);
}

.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border-color: var(--warning-border);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info-color);
    border-color: var(--info-border);
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--primary);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.2s ease;
}

.sidebar-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.65rem 1.25rem;
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.85rem;
    font-weight: 400;
    transition: all var(--transition);
    gap: 0.6rem;
    border-left: 2px solid transparent;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-weight: 500;
    border-left-color: #ffffff;
}

.nav-icon {
    font-size: 0.85rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-info {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.6rem;
}

.user-name {
    font-size: 0.8rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
}

.user-role {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.logout-link {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
    transition: color var(--transition);
}

.logout-link:hover {
    color: #ef4444;
}

.sidebar-toggle {
    display: none;
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 150;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    font-size: 1.1rem;
    cursor: pointer;
    color: var(--text);
    line-height: 1;
}

/* Overlay oscuro al abrir sidebar en movil */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}

/* --- Main content --- */
.main-content {
    padding: 2rem;
    min-height: 100vh;
}

.main-content.with-sidebar {
    margin-left: var(--sidebar-width);
}

/* --- Cards --- */
.card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body {
    padding: 1.25rem;
}

/* --- Sensor cards grid --- */
.sensors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.sensor-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    border-left: 3px solid var(--success);
    transition: border-color var(--transition);
    position: relative;
}

.sensor-card:hover {
    border-color: var(--text-secondary);
    border-left-color: var(--success);
}

.sensor-card.warning {
    border-left-color: var(--warning);
}

.sensor-card.warning:hover {
    border-left-color: var(--warning);
}

.sensor-card.danger {
    border-left-color: var(--danger);
}

.sensor-card.danger:hover {
    border-left-color: var(--danger);
}

.sensor-card.offline {
    border-left-color: var(--text-secondary);
    background: var(--bg-light);
}

.sensor-card.offline:hover {
    border-left-color: var(--text-secondary);
}

.sensor-card-name {
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.35rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.01em;
}

.sensor-card-location {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
}

.sensor-card-reading {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.sensor-temp {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.03em;
    line-height: 1;
}

.sensor-temp.danger-text {
    color: var(--danger);
}

.sensor-temp.warning-text {
    color: var(--warning);
}

.sensor-humidity {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.sensor-card-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 0.85rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
    font-size: 0.72rem;
    color: var(--text-secondary);
}

/* --- Chart container --- */
.chart-container {
    position: relative;
    height: 400px;
    margin-bottom: 1.5rem;
}

.range-selector {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    align-items: center;
}

.range-selector .btn {
    font-size: 0.65rem;
}

.range-selector .btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.range-selector input[type="date"] {
    width: auto;
    padding: 0.4rem 0.6rem;
    font-size: 0.8rem;
}

/* --- Alerts panel --- */
.alerts-panel {
    margin-top: 1.5rem;
}

.alerts-list {
    list-style: none;
}

.alerts-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.75rem;
}

.alerts-list li:last-child {
    border-bottom: none;
}

.alerts-list .alert-time {
    color: var(--text-secondary);
    white-space: nowrap;
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
}

.alerts-list .alert-text {
    flex: 1;
    line-height: 1.5;
}

.alert-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.alert-badge.temp {
    background: var(--danger-bg);
    color: var(--danger);
}

.alert-badge.humidity {
    background: var(--info-bg);
    color: var(--info-color);
}

.alert-badge.gap {
    background: var(--warning-bg);
    color: var(--warning);
}

.alert-badge.offline {
    background: var(--bg-light);
    color: var(--text-secondary);
}

/* --- Tables --- */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th,
td {
    padding: 0.7rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

th {
    background: var(--bg-light);
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
}

tr:hover {
    background: var(--bg-light);
}

td.breach {
    background: var(--danger-bg);
    color: var(--danger);
    font-weight: 600;
}

/* --- Page header --- */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* --- Status indicators --- */
.status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    margin-right: 0.4rem;
    flex-shrink: 0;
}

.status-dot.ok {
    background: var(--success);
}

.status-dot.warning {
    background: var(--warning);
}

.status-dot.danger {
    background: var(--danger);
}

.status-dot.offline {
    background: var(--text-secondary);
}

/* --- Page content (wiki layout) --- */
.page-content {
    max-width: 780px;
    line-height: 1.7;
}

.page-content h1,
.page-content h2,
.page-content h3,
.page-content h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.page-content h1 { font-size: 1.5rem; }
.page-content h2 { font-size: 1.25rem; }
.page-content h3 { font-size: 1.05rem; }
.page-content h4 { font-size: 0.95rem; }

.page-content p {
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 0.92rem;
}

.page-content ul,
.page-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.page-content li {
    margin-bottom: 0.35rem;
    font-size: 0.92rem;
}

.page-content a {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: var(--border);
}

.page-content a:hover {
    text-decoration-color: var(--text);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .main-content.with-sidebar {
        margin-left: 0;
        padding-top: 3.5rem;
    }

    .main-content {
        padding: 1.25rem;
    }

    .page-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .page-header h2 {
        font-size: 1.2rem;
    }

    .card-header {
        font-size: 0.7rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .card-body {
        padding: 1rem;
    }

    /* Tablas scroll horizontal */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        font-size: 0.82rem;
    }

    /* Forms en columna */
    .d-flex.gap-2 {
        flex-wrap: wrap;
    }

    .form-group {
        min-width: 0 !important;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 0.75rem;
        padding-top: 3.5rem;
    }

    .login-card {
        padding: 2rem 1.25rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.65rem;
    }

    .page-header h2 {
        font-size: 1.05rem;
    }
}

/* --- Utilities --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.w-100 { width: 100%; }
.hidden { display: none; }