/* TIOO Design System — Base (§4.4a) */
/* Dark Navy + Warm Amber palette — premium property management */

:root {
    /* Primary palette */
    --color-primary: #1c232d;
    --color-primary-light: #2a3444;
    --color-primary-dark: #10131f;
    --color-secondary: #3a4556;
    --color-accent: #f59e0b;
    --color-accent-light: #fbbf24;
    --color-accent-dark: #d97706;

    /* Semantic */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;

    /* Spacing (4px base) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}
/* Skip to content — accessibility */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 10000;
    padding: 10px 20px;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    border-radius: 0 0 6px 6px;
    text-decoration: none;
    transition: top 0.2s;
}
.skip-to-content:focus {
    top: 0;
    color: #fff;
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-light); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* Utility classes */
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
    padding: 10px 20px;
    border: 1px solid transparent; border-radius: var(--radius-md);
    font-weight: 600; font-size: var(--text-sm);
    cursor: pointer; transition: all var(--transition-base);
    text-decoration: none; line-height: 1.4;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
    background: var(--color-accent); color: var(--color-white);
    border-color: var(--color-accent);
    box-shadow: 0 1px 2px rgba(245, 158, 11, 0.2);
}
.btn-primary:visited { color: var(--color-white); }
.btn-primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: var(--color-white); box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3); }
.btn-secondary {
    background: var(--color-white); color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}
.btn-secondary:visited { color: var(--color-gray-700); }
.btn-secondary:hover { background: var(--color-gray-50); border-color: var(--color-gray-400); }
.btn-danger {
    background: var(--color-error); color: var(--color-white);
    border-color: var(--color-error);
}
.btn-danger:visited { color: var(--color-white); }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 6px 14px; font-size: var(--text-xs); }
.btn-lg { padding: 14px 28px; font-size: var(--text-base); }
.btn-success {
    background: var(--color-success); color: var(--color-white);
    border-color: var(--color-success);
}
.btn-success:visited { color: var(--color-white); }
.btn-success:hover { background: #059669; }

/* Forms */
.form-group { margin-bottom: var(--space-5); }
.form-group label {
    display: block; margin-bottom: var(--space-2);
    font-weight: 500; font-size: var(--text-sm); color: var(--color-gray-700);
}
.form-control {
    width: 100%; padding: 10px 14px;
    border: 1px solid var(--color-gray-300); border-radius: var(--radius-md);
    font-size: var(--text-sm); transition: all var(--transition-fast);
    background: var(--color-white);
}
.form-control:focus {
    outline: none; border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(28, 35, 45, 0.12);
}
select.form-control { appearance: auto; }
.form-help { font-size: var(--text-xs); color: var(--color-gray-500); margin-top: var(--space-1); }
.form-error { font-size: var(--text-xs); color: var(--color-error); margin-top: var(--space-1); }

/* Cards */
.card {
    background: var(--color-white); border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl); padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}
.card-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: var(--space-4); padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-gray-200);
}
.card-header h2, .card-header h3 { margin: 0; }

/* Tables */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-md); max-width: 100%; }
table {
    width: 100%; border-collapse: collapse;
    font-size: var(--text-sm);
}
thead th {
    text-align: left; padding: var(--space-3) var(--space-4);
    background: var(--color-gray-50); border-bottom: 2px solid var(--color-gray-200);
    font-weight: 600; color: var(--color-gray-600);
    white-space: nowrap; font-size: var(--text-xs);
    text-transform: uppercase; letter-spacing: 0.04em;
}
tbody td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-gray-100);
}
tbody tr:hover { background: var(--color-gray-50); }

/* Badges */
.badge {
    display: inline-flex; align-items: center;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs); font-weight: 600;
    letter-spacing: 0.01em;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-error, .badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-gray { background: var(--color-gray-100); color: var(--color-gray-600); }

/* Alerts / Messages */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: var(--text-sm); font-weight: 500;
}
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* Empty state */
.empty-state {
    text-align: center; padding: var(--space-16) var(--space-8);
    color: var(--color-gray-500);
}
.empty-state h3 { color: var(--color-gray-700); margin-bottom: var(--space-2); }
.empty-state p { margin-bottom: var(--space-4); }

/* Password visibility toggle */
.pw-toggle-wrap {
    position: relative;
}
.pw-toggle-wrap input {
    padding-right: 42px;
}
.pw-toggle-btn {
    position: absolute;
    right: 1px;
    top: 1px;
    bottom: 1px;
    width: 38px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-400);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    transition: color 0.15s;
    padding: 0;
}
.pw-toggle-btn:hover { color: var(--color-gray-600); }
.pw-toggle-btn svg { width: 18px; height: 18px; pointer-events: none; }