/* ==========================================================================
   INNOVADAT DESIGN SYSTEM v1.0
   Design Foundation for Landing and Internal Dashboards
   ========================================================================== */

/* 1. RESET & NORMALIZE
   ========================================================================== */
:where(*, *::before, *::after) {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    font-family: system-ui, -apple-system, sans-serif;
}

body {
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, svg {
    display: block;
    max-width: 100%;
}

button, input, textarea {
    font: inherit;
    color: inherit;
}

/* 2. VARIABLES & TOKENS (LIGHT MODE)
   ========================================================================== */
:root {
    /* Colors - Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-gray-950: #030712;

    /* Colors - Accent (Tech Blue) */
    --color-accent: #2563eb;
    --color-accent-soft: rgba(37, 99, 235, 0.1);
    
    /* Semantic Colors */
    --color-success: #10b981;
    --color-info: #3b82f6;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    /* Surface Tokens */
    --bg-base: var(--color-white);
    --bg-surface: var(--color-gray-50);
    --bg-surface-alt: var(--color-gray-100);
    --text-main: var(--color-gray-900);
    --text-secondary: var(--color-gray-600);
    --text-tertiary: var(--color-gray-400);
    --border-color: var(--color-gray-200);

    /* Typography Scale */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-h4: 1.5rem;
    --fs-h3: 1.875rem;
    --fs-h2: 2.25rem;
    --fs-h1: 3rem;
    --fs-display: 4rem;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;

    /* Layout */
    --container-max: 1200px;
    --z-header: 100;
}

/* 3. DARK MODE OVERRIDES
   ========================================================================== */
html[data-theme="dark"] {
    --bg-base: var(--color-gray-950);
    --bg-surface: var(--color-gray-900);
    --bg-surface-alt: #0a0f1b;
    --text-main: var(--color-gray-100);
    --text-secondary: var(--color-gray-400);
    --text-tertiary: var(--color-gray-600);
    --border-color: var(--color-gray-800);
    
    --color-accent: #60a5fa;
    --color-accent-soft: rgba(96, 165, 250, 0.1);
}

/* 4. BASE UI
   ========================================================================== */
body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-size: var(--fs-base);
}

::selection {
    background-color: var(--color-accent);
    color: white;
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

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

/* 5. TYPOGRAPHY
   ========================================================================== */
.text-display { font-size: var(--fs-display); line-height: 1.1; }
.text-h1 { font-size: var(--fs-h1); line-height: 1.2; }
.text-h2 { font-size: var(--fs-h2); line-height: 1.2; }
.text-h3 { font-size: var(--fs-h3); line-height: 1.3; }
.text-h4 { font-size: var(--fs-h4); line-height: 1.4; }
.text-h5 { font-size: var(--fs-xl); line-height: 1.4; }
.text-lg { font-size: var(--fs-lg); }
.text-sm { font-size: var(--fs-sm); }
.text-xs { font-size: var(--fs-xs); }

.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.font-mono { font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace; }

.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-accent { color: var(--color-accent); }
.text-center { text-align: center; }

/* 6. LAYOUT SYSTEM
   ========================================================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

.grid { display: grid; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }

.stack > * + * { margin-top: var(--space-4); }

.w-full { width: 100%; }

/* Responsive Grids */
@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:flex-row { flex-direction: row; }
}

/* Spacing Helpers */
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-20 { padding-top: var(--space-20); padding-bottom: var(--space-20); }
.py-24 { padding-top: var(--space-24); padding-bottom: var(--space-24); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-10 { margin-bottom: var(--space-10); }
.mb-12 { margin-bottom: var(--space-12); }
.mt-4 { margin-top: var(--space-4); }

/* Borders */
.border { border: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }

/* Backgrounds */
.bg-base { background-color: var(--bg-base); }
.bg-surface { background-color: var(--bg-surface); }
.bg-surface-alt { background-color: var(--bg-surface-alt); }

/* 7. COMPONENTS
   ========================================================================== */

/* Header & Nav */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background-color: rgba(var(--bg-base), 0.8);
    backdrop-filter: blur(8px);
}

.nav-link:hover {
    color: var(--color-accent);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    border: 1px solid transparent;
}

.btn-sm { padding: 0.5rem 1rem; font-size: var(--fs-sm); }

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.btn-secondary {
    background-color: var(--color-gray-200);
    color: var(--color-gray-900);
}
[data-theme="dark"] .btn-secondary { background-color: var(--color-gray-800); color: white; }

.btn-outline {
    border-color: var(--border-color);
    background: transparent;
}
.btn-outline:hover { background: var(--bg-surface-alt); }

.btn-ghost {
    background: transparent;
}
.btn-ghost:hover { background: var(--color-accent-soft); color: var(--color-accent); }

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-secondary);
}

/* Cards */
.card {
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.card-featured {
    border-width: 2px;
    border-color: var(--color-accent);
    position: relative;
}

.card-body {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: var(--fs-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.badge-outline { border: 1px solid var(--border-color); color: var(--text-secondary); }
.badge-success { background-color: rgba(16, 185, 129, 0.1); color: var(--color-success); }
.badge-info { background-color: rgba(59, 130, 246, 0.1); color: var(--color-info); }
.badge-warning { background-color: rgba(245, 158, 11, 0.1); color: var(--color-warning); }

.badge-dot {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 2px 8px;
}
.badge-dot::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: currentColor;
}

/* Forms */
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.label { font-size: var(--fs-sm); font-weight: 500; color: var(--text-secondary); }
.input {
    padding: 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-base);
    transition: var(--transition-fast);
}
.input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
    outline: none;
}

/* Utils */
.hidden { display: none !important; }

/* 8. SPECIFIC PAGE ELEMENTS
   ========================================================================== */
.log-container {
    box-shadow: var(--shadow-md);
}
.log-item:hover { background-color: var(--bg-surface); }

.site-footer a:hover { color: var(--color-accent); }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-hero { animation: fadeIn 0.8s ease-out; }