/* ==========================================================================
   ZEO FOCUS - Core Design System & Reset
   Ultra-modern, premium, responsive styling with dark/light themes.
   ========================================================================== */

:root {
    /* Color Palette - Midnight Dark (Default) */
    --bg-page: #080c14;
    --bg-surface: #0f172a;
    --bg-surface-elevated: #162036;
    --bg-surface-hover: #1e293b;
    --border-color: #1e293b;
    --border-subtle: #27354f;

    /* Brand Accents */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.15);
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    /* Semantic Colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --info: #0ea5e9;
    --info-bg: rgba(14, 165, 233, 0.12);

    /* Text Colors */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;
    --text-inverse: #0f172a;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Spacing & Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);

    /* Layout */
    --sidebar-width: 260px;
    --header-height: 64px;
    --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-elevated: #f1f5f9;
    --bg-surface-hover: #e2e8f0;
    --border-color: #e2e8f0;
    --border-subtle: #cbd5e1;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

body {
    background-color: var(--bg-page);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

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

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-main);
}
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    font-size: 0.92rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
    user-select: none;
}
.btn:active {
    transform: scale(0.98);
}
.btn-primary {
    background: var(--primary-gradient);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
    filter: brightness(1.1);
    color: #ffffff;
}
.btn-secondary {
    background: var(--bg-surface-elevated);
    color: var(--text-main);
    border-color: var(--border-color);
}
.btn-secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-subtle);
}
.btn-success {
    background: var(--success);
    color: #ffffff;
}
.btn-danger {
    background: var(--danger);
    color: #ffffff;
}
.btn-danger-outline {
    background: transparent;
    border-color: var(--danger);
    color: var(--danger);
}
.btn-danger-outline:hover {
    background: var(--danger-bg);
}
.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
}
.btn-lg {
    padding: 0.85rem 1.75rem;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}
.btn-icon {
    padding: 0.55rem;
    border-radius: var(--radius-md);
}

/* Form Controls */
.form-group {
    margin-bottom: 1.25rem;
}
.form-label {
    display: block;
    margin-bottom: 0.45rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-main);
}
.form-control {
    width: 100%;
    padding: 0.7rem 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    transition: var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}
.form-control::placeholder {
    color: var(--text-subtle);
}
textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-secondary { background: var(--bg-surface-elevated); color: var(--text-muted); }
.badge-critical { background: #450a0a; color: #f87171; border: 1px solid #7f1d1d; }

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.card-hover:hover {
    border-color: var(--border-subtle);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}
.table th, .table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.table th {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-subtle);
    background: var(--bg-surface-elevated);
}
.table tbody tr:hover {
    background: var(--bg-surface-hover);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(4, 7, 13, 0.8);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}
.modal-overlay.active {
    display: flex;
}
.modal-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 520px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: modalIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-body {
    padding: 1.5rem;
}
.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    background: var(--bg-surface-elevated);
}

/* Grid & Layout Utilities */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex { display: flex; }
.flex-between { justify-content: space-between; }
.flex-center { justify-content: center; align-items: center; }
.items-center { align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-page);
}
::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-subtle);
}