/**
 * NOMIKA EPILEKTA - UNIFIED DESIGN SYSTEM
 * Premium Legal Platform Theme
 * 
 * This file defines the complete design system for the entire platform:
 * - Public frontend
 * - User portal
 * - Admin back-office
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;0,800;1,400;1,600&display=swap');

:root {
    /* === COLOR PALETTE === */

    /* Primary (Deep Midnight Blue) */
    /* Lightened primary palette: shift all values up to avoid overly dark blues.
       These values lean towards navy/royal blue rather than near-black. */
    --color-primary-950: #14284a;
    --color-primary-900: #22395a;
    --color-primary-800: #2f4a6f;
    --color-primary-700: #3f5b82;
    --color-primary-600: #4f6d94;
    --color-primary-500: #5f7fa7;
    --color-primary-400: #728fba;
    --color-primary-300: #8ea5c1;
    --color-primary-200: #bdcade;
    --color-primary-100: #e8eff4;
    --color-primary-50: #f6f9fb;

    /* Accent (Gold/Yellow) */
    --color-accent-900: #9d6e1f;
    --color-accent-800: #c4882a;
    --color-accent-700: #d49130;
    --color-accent-600: #e4a13b;
    --color-accent-500: #f5b042;
    --color-accent-400: #f7c065;
    --color-accent-300: #f9d088;
    --color-accent-200: #fce0ab;
    --color-accent-100: #fef0ce;
    --color-accent-50: #fff8e7;

    /* Neutrals (Grays) */
    --color-gray-950: #0f1419;
    --color-gray-900: #1a1f28;
    --color-gray-800: #2d3441;
    --color-gray-700: #404755;
    --color-gray-600: #5c6474;
    --color-gray-500: #7a8192;
    --color-gray-400: #9ba3b0;
    --color-gray-300: #bdc3cd;
    --color-gray-200: #d5dbe5;
    --color-gray-100: #e8ecf1;
    --color-gray-50: #f6f8fb;

    /* Semantic Colors */
    --color-success-700: #1b9448;
    --color-success-600: #229e4f;
    --color-success-500: #2ec27e;
    --color-success-100: #d4f4e2;

    --color-warning-700: #c47127;
    --color-warning-600: #de802e;
    --color-warning-500: #fa8231;
    --color-warning-100: #feeddb;

    --color-danger-700: #b02b2b;
    --color-danger-600: #c23030;
    --color-danger-500: #d9534f;
    --color-danger-100: #f9d9d8;

    --color-info-700: #1d5b99;
    --color-info-600: #2167a7;
    --color-info-500: #3c7eb9;
    --color-info-100: #d9e9f7;

    /* Surface Colors */
    --color-white: #ffffff;
    --color-surface: #ffffff;
    --color-surface-secondary: #f8fafc;
    --color-background: #edf1f5;
    --color-overlay: rgba(10, 30, 49, 0.7);

        /* Text Colors */
    --color-text-primary: #142032;
    --color-text-secondary: #404755;
    --color-text-tertiary: #5c6474;
    --color-text-muted: #7a8192;
    --color-text-inverse: #ffffff;

    /* Border Colors */
    --color-border-light: #e8ecf1;
    --color-border-medium: #d5dbe5;
    --color-border-strong: #bdc3cd;
    --color-border-focus: var(--color-primary-500);

    /* === SEMANTIC SHORTHAND ALIASES (Phase 3) === */
    --primary: var(--color-primary-600);
    --primary-dark: var(--color-primary-800);
    --primary-light: var(--color-primary-100);
    --secondary: var(--color-accent-500);
    --secondary-dark: var(--color-accent-700);
    --background: var(--color-background);
    --surface: var(--color-surface);
    --text: var(--color-text-primary);
    --text-light: var(--color-text-muted);
    --muted: var(--color-text-tertiary);
    --border: var(--color-border-light);
    --accent: var(--color-accent-500);
    --line-height-base: var(--line-height-normal);

    /* === LEGACY COMPATIBILITY ALIASES === */
    /* These ensure older CSS patterns still work correctly */
    --light: var(--color-surface-secondary);
    --color-light: var(--color-surface-secondary);
    --color-accent: var(--color-accent-500);
    --accent-dark: var(--color-accent-700);
    --border-strong: var(--color-border-strong);
    --color-surface-alt: var(--color-surface-secondary);
    --color-primary: var(--color-primary-800);
    --color-primary-dark: var(--color-primary-900);
    --color-primary-light: var(--color-primary-600);
    --color-secondary: var(--color-info-700);
    --color-text: var(--color-text-primary);
    --color-border: var(--color-border-medium);

    /* === TYPOGRAPHY === */

    /* Font Families */
    --font-family-heading: 'Playfair Display', Georgia, serif;
    --font-family-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

    /* Font Sizes */
    --font-size-xs: 0.75rem;
    /* 12px */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 1.875rem;
    /* 30px */
    --font-size-4xl: 2.25rem;
    /* 36px */
    --font-size-5xl: 3rem;
    /* 48px */
    --font-size-6xl: 3.75rem;
    /* 60px */

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;

    /* Letter Spacing */
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;
    --letter-spacing-wider: 0.05em;
    --letter-spacing-widest: 0.1em;

    /* === SPACING SCALE (4px base) === */
    --space-0: 0;
    --space-1: 0.25rem;
    /* 4px */
    --space-2: 0.5rem;
    /* 8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.25rem;
    /* 20px */
    --space-6: 1.5rem;
    /* 24px */
    --space-7: 1.75rem;
    /* 28px */
    --space-8: 2rem;
    /* 32px */
    --space-10: 2.5rem;
    /* 40px */
    --space-12: 3rem;
    /* 48px */
    --space-16: 4rem;
    /* 64px */
    --space-20: 5rem;
    /* 80px */
    --space-24: 6rem;
    /* 96px */

    /* === BORDER RADIUS === */
    --radius-none: 0;
    --radius-sm: 0.375rem;
    /* 6px */
    --radius-base: 0.5rem;
    /* 8px */
    --radius-md: 0.75rem;
    /* 12px */
    --radius-lg: 1rem;
    /* 16px */
    --radius-xl: 1.25rem;
    /* 20px */
    --radius-2xl: 1.5rem;
    /* 24px */
    --radius-full: 9999px;

    /* === SHADOWS === */
    --shadow-xs: 0 1px 2px 0 rgba(10, 30, 49, 0.05);
    --shadow-sm: 0 2px 4px 0 rgba(10, 30, 49, 0.08);
    --shadow-base: 0 4px 8px 0 rgba(10, 30, 49, 0.1);
    --shadow-md: 0 6px 16px 0 rgba(10, 30, 49, 0.12);
    --shadow-lg: 0 12px 24px 0 rgba(10, 30, 49, 0.15);
    --shadow-xl: 0 20px 40px 0 rgba(10, 30, 49, 0.20);
    --shadow-inner: inset 0 2px 4px 0 rgba(10, 30, 49, 0.06);

    /* Focus Ring */
    --focus-ring: 0 0 0 3px rgba(31, 75, 114, 0.15);
    --focus-ring-offset: 0 0 0 2px white, 0 0 0 5px rgba(31, 75, 114, 0.15);

    /* === TRANSITIONS === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* === Z-INDEX SCALE === */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* === LAYOUT === */
    --max-width-xs: 320px;
    --max-width-sm: 512px;
    --max-width-md: 768px;
    --max-width-lg: 1024px;
    --max-width-xl: 1280px;
    --max-width-2xl: 1360px;
    --max-width-full: 100%;

    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;

    /* === COMPONENT-SPECIFIC === */
    --header-height: 72px;
    --sidebar-width: 280px;
    --card-padding: var(--space-6);
    --input-height: 44px;
    --button-height: 44px;
}

/* ============================================
   BASE STYLES
   ============================================ */

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

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

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-primary-800);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary-600);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-accent-500);
}

a:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Selection */
::selection {
    background-color: var(--color-accent-200);
    color: var(--color-text-primary);
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-container {
    width: 100%;
    max-width: var(--max-width-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.content-container-narrow {
    max-width: var(--max-width-lg);
}

.content-container-wide {
    max-width: var(--max-width-2xl);
}

.section {
    padding: var(--space-16) 0;
}

.section-compact {
    padding: var(--space-12) 0;
}

.section-spacious {
    padding: var(--space-24) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-overline {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-accent-600);
    margin-bottom: var(--space-2);
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
    max-width: 600px;
    margin: 0 auto;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {

}

/* ===========================================
   PHASE 4: UNIFIED RESPONSIVE GRID SYSTEM
   =========================================== */

/* Standard Grid Shortcuts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

/* Auto-fit Responsive Grids */
.grid-responsive {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.grid-responsive-sm {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
}

.grid-responsive-lg {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

/* Grid Gap Variants */
.grid-gap-sm { gap: var(--space-4); }
.grid-gap-md { gap: var(--space-6); }
.grid-gap-lg { gap: var(--space-8); }
.grid-gap-xl { gap: var(--space-10); }

/* Card Aspect Ratios */
.card-image,
.article-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 16/9;
}

/* Header Clearance */
.page-content-padded {
    padding-top: calc(var(--header-height) + var(--space-6));
}

/* Unified Breakpoint Overrides */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .grid-responsive, .grid-responsive-sm, .grid-responsive-lg { grid-template-columns: 1fr; }
}

/* Flex Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-end {
    justify-content: flex-end;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.gap-8 {
    gap: var(--space-8);
}

/* ============================================
   CARD COMPONENT
   ============================================ */

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-interactive:hover {
    transform: translateY(-2px);
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2,
.card-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.card-body {
    padding: var(--card-padding);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--color-border-light);
    background-color: var(--color-surface-secondary);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--color-primary-100), var(--color-accent-100));
}

/* ============================================
   BUTTON COMPONENT
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 var(--space-6);
    height: var(--button-height);
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}


.btn-primary {
    background-color: var(--color-primary-800);
    color: var(--color-text-inverse);
    border-color: var(--color-primary-800);
}

.btn-primary:hover {
    background-color: var(--color-primary-900);
    border-color: var(--color-primary-900);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Δεύτερο βασικό κουμπί – χρυσό */
.btn-secondary {
    background-color: var(--color-accent-500);
    color: var(--color-primary-900);
    border-color: var(--color-accent-500);
}

.btn-secondary:hover {
    background-color: var(--color-accent-600);
    border-color: var(--color-accent-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Outline κουμπί */
.btn-outline {
    background-color: transparent;
    color: var(--color-primary-700);
    border-color: var(--color-border-strong);
}

.btn-outline:hover {
    background-color: var(--color-primary-50);
    border-color: var(--color-primary-600);
}

/* Ghost κουμπί */
.btn-ghost {
    background-color: transparent;
    color: var(--color-primary-700);
    border-color: transparent;
}

.btn-ghost:hover {
    background-color: var(--color-primary-50);
}

/* Danger κουμπί */
.btn-danger {
    background-color: var(--color-danger-500);
    color: var(--color-text-inverse);
    border-color: var(--color-danger-500);
}

.btn-danger:hover {
    background-color: var(--color-danger-600);
    border-color: var(--color-danger-600);
}

/* Button Sizes */
.btn-sm {
    height: 36px;
    padding: 0 var(--space-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    height: 52px;
    padding: 0 var(--space-8);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero White Button - για το hero στην αρχική */
.btn-hero-white {
    background-color: var(--color-white);
    color: var(--color-primary-800);
    /* ΕΔΩ κρατάμε σκούρο κείμενο, όχι κίτρινο */
    border-color: var(--color-white);
}

.btn-hero-white:hover {
    background-color: var(--color-white);
    color: var(--color-primary-900);
    border-color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-hero-white:active {
    background-color: var(--color-white);
    color: var(--color-primary-900);
    transform: translateY(0);
}

/* ============================================
   FORM COMPONENTS
   ============================================ */

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.form-label-required::after {
    content: '*';
    color: var(--color-danger-500);
    margin-left: var(--space-1);
}

.form-control,
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    height: var(--input-height);
    padding: 0 var(--space-4);
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background-color: var(--color-surface);
    border: 2px solid var(--color-border-medium);
    border-radius: var(--radius-base);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-textarea {
    height: auto;
    min-height: 120px;
    padding: var(--space-3) var(--space-4);
    resize: vertical;
}

.form-control:hover,
.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: var(--color-border-strong);
}

.form-control:focus,
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: var(--focus-ring);
}

.form-control:disabled,
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background-color: var(--color-gray-50);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-control.is-invalid,
.form-input.is-invalid,
.form-select.is-invalid,
.form-textarea.is-invalid {
    border-color: var(--color-danger-500);
}

.form-control.is-valid,
.form-input.is-valid,
.form-select.is-valid,
.form-textarea.is-valid {
    border-color: var(--color-success-500);
}

.form-hint {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.form-error {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-danger-600);
}

.form-success {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-success-600);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-check-input {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* ============================================
   BADGE COMPONENT
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background-color: var(--color-primary-100);
    color: var(--color-primary-800);
}

.badge-secondary {
    background-color: var(--color-accent-100);
    color: var(--color-accent-900);
}

.badge-success {
    background-color: var(--color-success-100);
    color: var(--color-success-700);
}

.badge-warning {
    background-color: var(--color-warning-100);
    color: var(--color-warning-700);
}

.badge-danger {
    background-color: var(--color-danger-100);
    color: var(--color-danger-700);
}

.badge-info {
    background-color: var(--color-info-100);
    color: var(--color-info-700);
}

.badge-lg {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

/* ============================================
   TABLE COMPONENT
   ============================================ */

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-surface);
}

.table thead {
    background-color: var(--color-surface-secondary);
}

.table th {
    padding: var(--space-4);
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    border-bottom: 2px solid var(--color-border-medium);
}

.table td {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-primary);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table tbody tr:hover {
    background-color: var(--color-surface-secondary);
}

.table-actions {
    display: flex;
    gap: var(--space-2);
}

/* ============================================
   ALERT COMPONENT
   ============================================ */

.alert {
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.alert-success {
    background-color: var(--color-success-100);
    border-color: var(--color-success-500);
    color: var(--color-success-700);
}

.alert-warning {
    background-color: var(--color-warning-100);
    border-color: var(--color-warning-500);
    color: var(--color-warning-700);
}

.alert-danger {
    background-color: var(--color-danger-100);
    border-color: var(--color-danger-500);
    color: var(--color-danger-700);
}

.alert-info {
    background-color: var(--color-info-100);
    border-color: var(--color-info-500);
    color: var(--color-info-700);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Margin Top */
.mt-0 {
    margin-top: 0;
}

.mt-xs {
    margin-top: var(--space-2);
}

.mt-sm {
    margin-top: var(--space-4);
}

.mt-md {
    margin-top: var(--space-6);
}

.mt-lg {
    margin-top: var(--space-8);
}

.mt-xl {
    margin-top: var(--space-12);
}

/* Margin Bottom */
.mb-0 {
    margin-bottom: 0;
}

.mb-xs {
    margin-bottom: var(--space-2);
}

.mb-sm {
    margin-bottom: var(--space-4);
}

.mb-md {
    margin-bottom: var(--space-6);
}

.mb-lg {
    margin-bottom: var(--space-8);
}

.mb-xl {
    margin-bottom: var(--space-12);
}

/* Margin Left/Right */
.ml-auto {
    margin-left: auto;
}

.mr-auto {
    margin-right: auto;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

/* Padding Top */
.pt-0 {
    padding-top: 0;
}

.pt-xs {
    padding-top: var(--space-2);
}

.pt-sm {
    padding-top: var(--space-4);
}

.pt-md {
    padding-top: var(--space-6);
}

.pt-lg {
    padding-top: var(--space-8);
}

.pt-xl {
    padding-top: var(--space-12);
}

/* Padding Bottom */
.pb-0 {
    padding-bottom: 0;
}

.pb-xs {
    padding-bottom: var(--space-2);
}

.pb-sm {
    padding-bottom: var(--space-4);
}

.pb-md {
    padding-bottom: var(--space-6);
}

.pb-lg {
    padding-bottom: var(--space-8);
}

.pb-xl {
    padding-bottom: var(--space-12);
}

/* Text Alignment */
.text-left {
    text-align: left;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

/* Display */
.d-block {
    display: block;
}

.d-inline-block {
    display: inline-block;
}

.d-flex {
    display: flex;
}

.d-none {
    display: none;
}

/* Flex Utilities */
.flex-column {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-xs {
    gap: var(--space-2);
}

.gap-sm {
    gap: var(--space-4);
}

.gap-md {
    gap: var(--space-6);
}

.gap-lg {
    gap: var(--space-8);
}

/* Width */
.w-full {
    width: 100%;
}

.w-auto {
    width: auto;
}

/* Border Radius Utilities */
.rounded {
    border-radius: var(--radius-base);
}

.rounded-md {
    border-radius: var(--radius-md);
}

.rounded-lg {
    border-radius: var(--radius-lg);
}

.rounded-full {
    border-radius: var(--radius-full);
}

/* ============================================
   PAGE HERO COMPONENT
   ============================================ */

.page-hero {
    background: linear-gradient(135deg, var(--color-primary-800), var(--color-primary-900));
    padding: var(--space-16) 0 var(--space-12);
    color: var(--color-text-inverse);
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.16), transparent 60%);
    pointer-events: none;
}

.page-hero .content-container {
    position: relative;
    z-index: 1;
}

.page-hero-content {
    max-width: 700px;
}

.page-hero-content .eyebrow {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wider);
    color: var(--color-accent-300);
    margin-bottom: var(--space-3);
    display: block;
}

.page-hero-content h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-white);
    margin-bottom: var(--space-4);
    font-weight: var(--font-weight-bold);
}

.page-hero-content p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-8);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.page-hero-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-10);
}

.meta-card {
    background: var(--color-primary-900);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-md);
}

.meta-card strong {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-500);
    margin-bottom: var(--space-1);
}

.meta-card span {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
}

.hero-slim {
    padding: var(--space-12) 0 var(--space-8);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --space-16: 3rem;
        --space-24: 4rem;
    }

    .content-container {
        padding: 0 var(--space-4);
    }

    .section {
        padding: var(--space-12) 0;
    }

    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .hero-actions {
        flex-direction: column;
        align-items: flex-start;
    }
}





/* ===========================================
   PHASE 5: ACCESSIBILITY & POLISH UTILITIES
   =========================================== */

/* Screen Reader Only */
.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;
}

/* Skip to Content Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    z-index: 9999;
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary-800);
    color: white;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
}

.skip-link:focus {
    top: var(--space-4);
}

/* Focus Ring Utilities */
:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

/* Touch Target Minimum (WCAG 44px) */
.touch-target {
    min-width: 44px;
    min-height: 44px;
}

button,
.btn,
a.btn,
input[type="button"],
input[type="submit"] {
    min-height: 44px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-border-light: #000;
        --shadow-sm: none;
        --shadow-md: none;
    }
    
    .btn-primary {
        border: 2px solid currentColor;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Alert Roles */
.alert[role="alert"] {
    /* Ensure screen readers announce alerts */
}

/* Form Error States */
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
    border-color: var(--color-danger-500);
}

.form-group.has-error .form-error {
    color: var(--color-danger-600);
    font-size: var(--font-size-sm);
    margin-top: var(--space-2);
}

/* Badge Alignment */
.badge,
.status-badge,
.tag-pill {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
}

/* Consistent Component Styling */
.card,
.alert,
.form-control {
    border-radius: var(--radius-md);
}

/* UI Polish: Consistent Transitions */
a, button, input, select, textarea, .btn, .card {
    transition: all var(--transition-base);
}


/* ===========================================
   PHASE 7: PERFORMANCE & CLS OPTIMIZATIONS
   =========================================== */

/* Reserve space for fixed header to prevent CLS */
body {
    padding-top: var(--header-height);
}

.main-navbar {
    height: var(--header-height);
}

/* Image aspect ratios to prevent CLS */
.card-image,
.article-thumbnail,
.featured-image {
    aspect-ratio: 16/9;
    background: var(--color-surface-secondary);
}

.card-image-square {
    aspect-ratio: 1/1;
}

.avatar-img {
    aspect-ratio: 1/1;
    border-radius: 50%;
}

/* Skeleton loading animation */
.skeleton {
    background: linear-gradient(90deg, var(--color-surface-secondary) 25%, var(--color-border-light) 50%, var(--color-surface-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    border-radius: var(--radius-sm);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    border-radius: var(--radius-sm);
}

.skeleton-image {
    aspect-ratio: 16/9;
    border-radius: var(--radius-md);
}

/* Button feedback */
button:active,
.btn:active {
    transform: scale(0.98);
}

/* Font fallback stack */
body {
    font-family: var(--font-family-body);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
}

/* Content visibility for below-fold optimization */
.lazy-section {
    content-visibility: auto;
    contain-intrinsic-size: auto 500px;
}


/* ===========================================
   PHASE 8: DARK/LIGHT MODE SYSTEM
   =========================================== */

/* Light Mode (Default) - Already defined in :root */

/* Dark Mode Overrides */
.theme-dark,
[data-theme="dark"] {
    /* Background Colors */
    --color-white: #14284a;
    --color-surface: #22395a;
    --color-surface-secondary: #2f4a6f;
    --color-background: #14284a;
    --color-overlay: rgba(10, 20, 34, 0.6);
    
    /* Text Colors */
    --color-text-primary: #e2e8f0;
    --color-text-secondary: #bac8e0;
    --color-text-tertiary: #90a0b5;
    --color-text-muted: #6e7f9c;
    --color-text-inverse: #14284a;
    
    /* Border Colors */
    --color-border-light: #2f455f;
    --color-border-medium: #405875;
    --color-border-strong: #536f8f;
    --color-border-focus: #5fa3fa;
    
    /* Primary palette adjustments for dark mode */
    --color-primary-50: #1e3a5f;
    --color-primary-100: #1e4976;
    --color-primary-200: #1e5a8d;
    --color-primary-700: #93c5fd;
    --color-primary-800: #bfdbfe;
    --color-primary-900: #dbeafe;
    
    /* Semantic aliases */
    --primary: #5fa3fa;
    --primary-dark: #8bb6ed;
    --primary-light: #3a7be0;
    --secondary: #405875;
    --background: #14284a;
    --surface: #22395a;
    --text: #e2e8f0;
    --text-light: #bac8e0;
    --muted: #6e7f9c;
    --border: #2f455f;
    
    /* Status colors adjusted */
    --color-success-50: #064e3b;
    --color-success-500: #4ade80;
    --color-success-600: #22c55e;
    --color-danger-50: #450a0a;
    --color-danger-500: #f87171;
    --color-danger-600: #ef4444;
    --color-warning-50: #422006;
    --color-warning-500: #fbbf24;
    
    /* Shadows for dark mode */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

/* System preference support */
@media (prefers-color-scheme: dark) {
    :root:not(.theme-light) {
        --color-white: #14284a;
        --color-surface: #22395a;
        --color-surface-secondary: #2f4a6f;
        --color-background: #14284a;
        --color-text-primary: #e2e8f0;
        --color-text-secondary: #bac8e0;
        --color-border-light: #2f455f;
        --primary: #5fa3fa;
        --background: #14284a;
        --surface: #22395a;
        --text: #e2e8f0;
        --border: #2f455f;
    }
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--color-surface-secondary);
    color: var(--color-text-primary);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: block; }

.theme-dark .theme-toggle .fa-sun { display: block; }
.theme-dark .theme-toggle .fa-moon { display: none; }

/* Dark mode component adjustments */
.theme-dark .card,
.theme-dark .alert,
.theme-dark .modal-content {
    background: var(--color-surface);
    border-color: var(--color-border-light);
}

.theme-dark input,
.theme-dark select,
.theme-dark textarea {
    background: var(--color-surface-secondary);
    border-color: var(--color-border-medium);
    color: var(--color-text-primary);
}

.theme-dark input::placeholder,
.theme-dark textarea::placeholder {
    color: var(--color-text-muted);
}

.theme-dark table {
    background: var(--color-surface);
}

.theme-dark th {
    background: var(--color-surface-secondary);
    color: var(--color-text-primary);
}

.theme-dark tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.theme-dark .btn-outline {
    border-color: var(--color-border-medium);
    color: var(--color-text-primary);
}

.theme-dark .btn-outline:hover {
    background: var(--color-surface-secondary);
}

.theme-dark code,
.theme-dark pre {
    background: var(--color-surface-secondary);
    color: var(--color-text-primary);
}

.theme-dark .badge {
    background: var(--color-surface-secondary);
}

.theme-dark blockquote {
    border-color: var(--primary);
    background: var(--color-surface-secondary);
}

/* Prevent FOUC */
html:not(.theme-ready) {
    visibility: hidden;
}