/**
 * Unified Foundation Stylesheet
 * - Design tokens
 * - Base resets
 * - Shared utilities and helpers
 */

:root {
    /* Primary palette */
    --primary-main: #1976d2;
    --primary-hover: #1565c0;
    --primary-dark: #1565c0;
    --primary-light: #e3f2fd;
    --primary-color: var(--primary-main);

    /* Secondary palette */
    --secondary-main: #dc004e;
    --secondary-hover: #c5003e;
    --secondary-dark: #c5003e;

    /* Status palette */
    --success-main: #4caf50;
    --warning-main: #ff9800;
    --error-main: #f44336;
    --error-dark: #d32f2f;
    --info-main: #2196f3;
    --success-color: var(--success-main);
    --warning-color: var(--warning-main);
    --error-color: var(--error-main);

    /* Core surfaces */
    --background-default: #ffffff;
    --background-paper: #ffffff;
    --background-elevated: #f8f9fa;
    --surface-hover: rgba(0, 0, 0, 0.04);
    --action-selected: rgba(25, 118, 210, 0.08);
    --action-hover: rgba(0, 0, 0, 0.04);
    --action-disabled: rgba(0, 0, 0, 0.26);

    /* Core typography */
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --text-tertiary: rgba(0, 0, 0, 0.45);
    --text-disabled: rgba(0, 0, 0, 0.38);
    --text-inverse: #0a0e1a;

    /* Layout & separators */
    --divider: rgba(0, 0, 0, 0.12);

    /* Shadows */
    --shadow-1: 0px 2px 1px -1px rgba(0,0,0,0.2), 0px 1px 1px 0px rgba(0,0,0,0.14), 0px 1px 3px 0px rgba(0,0,0,0.12);
    --shadow-4: 0px 2px 4px -1px rgba(0,0,0,0.2), 0px 4px 5px 0px rgba(0,0,0,0.14), 0px 1px 10px 0px rgba(0,0,0,0.12);
    --shadow-8: 0px 5px 5px -3px rgba(0,0,0,0.2), 0px 8px 10px 1px rgba(0,0,0,0.14), 0px 3px 14px 2px rgba(0,0,0,0.12);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Typography scale */
    --font-family: "Exo", "Helvetica", "Arial", sans-serif;
    --font-size: 15px;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    --liberdus-font-family: var(--font-family);
    --liberdus-font-light: var(--font-weight-light);
    --liberdus-font-normal: var(--font-weight-normal);
    --liberdus-font-medium: var(--font-weight-medium);
    --liberdus-font-semibold: var(--font-weight-semibold);
    --liberdus-font-bold: var(--font-weight-bold);

    /* Spacing scale */
    --spacing-1: 8px;
    --spacing-2: 16px;
    --spacing-3: 24px;
    --spacing-4: 32px;
    --spacing-6: 48px;

    --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;

    /* Layout helpers */
    --container-max-width: 1200px;
    --container-padding: var(--space-4);
    --header-height: 80px;
    --footer-height: 200px;

    /* Radius */
    --border-radius: 4px;
    --border-radius-lg: 8px;
    --border-radius-sm: 0.25rem;
    --border-radius-xl: 1rem;
    --border-radius-full: 9999px;

    /* Motion */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;

    /* Liberdus brand tokens (light baseline) */
    --liberdus-bg-primary: #0a0e1a;
    --liberdus-bg-secondary: #1a1f2e;
    --liberdus-bg-tertiary: #242938;
    --liberdus-bg-card: #1e2332;
    --liberdus-bg-hover: #2a2f3e;
    --liberdus-bg-input: #2d3748;

    --liberdus-text-primary: #ffffff;
    --liberdus-text-secondary: #b8bcc8;
    --liberdus-text-tertiary: #8b92a5;
    --liberdus-text-muted: #6b7280;
    --liberdus-text-disabled: #4a5568;

    --liberdus-border-primary: #2d3748;
    --liberdus-border-secondary: #4a5568;
    --liberdus-border-accent: #3182ce;
    --liberdus-border-hover: #4299e1;

    --liberdus-blue: #3182ce;
    --liberdus-blue-light: #4299e1;
    --liberdus-blue-dark: #2c5282;
    --liberdus-blue-bg: rgba(49, 130, 206, 0.1);
    --liberdus-blue-hover: rgba(49, 130, 206, 0.2);

    --liberdus-red: #e53e3e;
    --liberdus-red-light: #fc8181;
    --liberdus-red-dark: #c53030;
    --liberdus-red-bg: rgba(229, 62, 62, 0.1);
    --liberdus-red-hover: rgba(229, 62, 62, 0.2);

    --liberdus-green: #38a169;
    --liberdus-green-light: #68d391;
    --liberdus-green-dark: #2f855a;
    --liberdus-green-bg: rgba(56, 161, 105, 0.1);
    --liberdus-green-hover: rgba(56, 161, 105, 0.2);

    --liberdus-orange: #dd6b20;
    --liberdus-orange-light: #f6ad55;
    --liberdus-orange-dark: #c05621;
    --liberdus-orange-bg: rgba(221, 107, 32, 0.1);

    --liberdus-purple: #805ad5;
    --liberdus-purple-light: #b794f6;
    --liberdus-purple-dark: #6b46c1;
    --liberdus-purple-bg: rgba(128, 90, 213, 0.1);

    --liberdus-gold: #f6ad55;
    --liberdus-gold-light: #fbd38d;
    --liberdus-gold-dark: #ed8936;
    --liberdus-gold-glow: rgba(246, 173, 85, 0.3);

    --primary-600: var(--liberdus-blue-dark);
    --background-primary: var(--liberdus-bg-primary);
    --background-secondary: var(--liberdus-bg-secondary);
    --background-tertiary: var(--liberdus-bg-tertiary);
    --background-overlay: rgba(0, 0, 0, 0.8);
    --text-secondary-emphasis: var(--liberdus-text-secondary);
    --border-primary: var(--liberdus-border-primary);
    --border-secondary: var(--liberdus-border-secondary);
    --border-focus: var(--liberdus-border-accent);
}

[data-theme="dark"] {
    --background-default: #0a0e1a;
    --background-paper: #1a1f2e;
    --background-elevated: #242938;
    --surface-hover: rgba(255, 255, 255, 0.08);
    --action-selected: rgba(25, 118, 210, 0.16);
    --action-hover: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #b8bcc8;
    --text-tertiary: #8b92a5;
    --text-disabled: #4a5568;
    --text-inverse: #0a0e1a;
    --divider: rgba(255, 255, 255, 0.12);
    --shadow-1: 0px 2px 1px -1px rgba(0,0,0,0.4), 0px 1px 1px 0px rgba(0,0,0,0.28), 0px 1px 3px 0px rgba(0,0,0,0.24);
    --shadow-4: 0px 2px 4px -1px rgba(0,0,0,0.4), 0px 4px 5px 0px rgba(0,0,0,0.28), 0px 1px 10px 0px rgba(0,0,0,0.24);
    --shadow-8: 0px 5px 5px -3px rgba(0,0,0,0.4), 0px 8px 10px 1px rgba(0,0,0,0.28), 0px 3px 14px 2px rgba(0,0,0,0.24);

    --liberdus-bg-primary: #0a0e1a;
    --liberdus-bg-secondary: #1a1f2e;
    --liberdus-bg-tertiary: #242938;
    --liberdus-bg-card: #1e2332;
    --liberdus-bg-hover: #2a2f3e;
    --liberdus-bg-input: #2d3748;
    --liberdus-text-primary: #ffffff;
    --liberdus-text-secondary: #b8bcc8;
    --liberdus-text-tertiary: #8b92a5;
    --liberdus-text-muted: #6b7280;
    --liberdus-text-disabled: #4a5568;
    --liberdus-border-primary: #2d3748;
    --liberdus-border-secondary: #4a5568;
    --liberdus-border-accent: #3182ce;
    --liberdus-border-hover: #4299e1;
    --background-primary: var(--liberdus-bg-primary);
    --background-secondary: var(--liberdus-bg-secondary);
    --background-tertiary: var(--liberdus-bg-tertiary);
    --background-overlay: rgba(0, 0, 0, 0.8);
}

[data-theme="light"] {
    --background-default: #ffffff;
    --background-paper: #ffffff;
    --background-elevated: #f8f9fa;
    --surface-hover: rgba(0, 0, 0, 0.04);
    --action-selected: rgba(25, 118, 210, 0.08);
    --action-hover: rgba(0, 0, 0, 0.04);
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --text-tertiary: rgba(0, 0, 0, 0.45);
    --text-disabled: rgba(0, 0, 0, 0.38);
    --text-inverse: #0a0e1a;
    --divider: rgba(0, 0, 0, 0.12);
    --liberdus-bg-primary: #ffffff;
    --liberdus-bg-secondary: #f7fafc;
    --liberdus-bg-tertiary: #edf2f7;
    --liberdus-bg-card: #ffffff;
    --liberdus-bg-hover: rgba(25, 118, 210, 0.08);
    --liberdus-bg-input: #f1f5f9;
    --liberdus-text-primary: rgba(0, 0, 0, 0.87);
    --liberdus-text-secondary: rgba(0, 0, 0, 0.6);
    --liberdus-text-tertiary: rgba(0, 0, 0, 0.45);
    --liberdus-text-muted: rgba(0, 0, 0, 0.35);
    --liberdus-text-disabled: rgba(0, 0, 0, 0.3);
    --liberdus-border-primary: #e2e8f0;
    --liberdus-border-secondary: #cbd5e0;
    --liberdus-border-accent: #3182ce;
    --liberdus-border-hover: #4299e1;
    --background-primary: var(--liberdus-bg-primary);
    --background-secondary: var(--liberdus-bg-secondary);
    --background-tertiary: var(--liberdus-bg-tertiary);
    --background-overlay: rgba(0, 0, 0, 0.08);
}

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

* {
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--font-family);
    font-size: var(--font-size);
    line-height: var(--line-height-normal);
    background: var(--background-default);
    color: var(--text-primary);
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

button,
input,
textarea,
select {
    font-family: inherit;
    color: inherit;
}

:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

::selection {
    background-color: var(--primary-light);
    color: var(--primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
    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); }

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

ul,
ol {
    margin-left: var(--space-4);
    margin-bottom: var(--space-4);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-lg {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-3);
}

.container-xl {
    max-width: 1536px;
    margin: 0 auto;
    padding: 0 var(--spacing-3);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.btn:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--primary-main);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-4);
}

.btn-secondary {
    background: var(--secondary-main);
    color: #fff;
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-4);
}

.btn-success {
    background: var(--success-main);
    color: #fff;
}

.btn-success:hover {
    background: #388e3c;
    transform: translateY(-1px);
    box-shadow: var(--shadow-4);
}

.btn-danger {
    background: var(--error-main);
    color: #fff;
}

.btn-danger:hover {
    background: var(--error-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-4);
}

.btn-text {
    background: transparent;
    color: var(--primary-main);
}

.btn-text:hover {
    background: var(--action-hover);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-main);
    color: var(--primary-main);
}

.btn-outline:hover {
    background: var(--primary-main);
    color: #fff;
}

.btn-small {
    padding: 6px 12px;
    font-size: 13px;
    min-width: 80px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    inset: calc(50% - 10px) auto auto calc(50% - 10px);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    animation: spin 1s linear infinite;
}

.card {
    background: var(--background-paper);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-1);
    border: 1px solid var(--divider);
}

.card-header {
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--background-elevated);
    border-color: var(--divider);
}

.card-body {
    padding: var(--spacing-3);
}

.hidden { display: none !important; }
.loading { opacity: 0.6; pointer-events: none; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Flexbox Utilities */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-none { flex: none; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }


/* Grid Utilities */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

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

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-2 { margin: var(--space-2); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.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); }

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Display Utilities */
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

/* Position Utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Width/Height Utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }
.h-full { height: 100%; }
.h-auto { height: auto; }

/* Overflow Utilities */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-hidden { overflow-x: hidden; }
.overflow-y-auto { overflow-y: auto; }

.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;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

@media (max-width: 768px) {
    .container,
    .container-lg,
    .container-xl {
        padding-left: var(--spacing-2);
        padding-right: var(--spacing-2);
    }
}

@media (max-width: 320px) {
    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .btn {
        min-width: 44px;
        min-height: 44px;
    }
}

/* Pair name links on both admin and home pages */
.pair-name-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 4px 0;
}

.pair-name-link:hover { opacity: 0.8; }

.pair-name-link-text {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 14px;
}

.pair-name-link-icon {
    flex-shrink: 0;
    transition: all 0.2s ease;
    min-width: 20px;
    width: 20px;
    height: 20px;
    stroke: var(--primary-main);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

/* Shared Modal Styles */
.modal-close {
  background: transparent !important;
  color: var(--text-secondary) !important;
  border: none !important;
  cursor: pointer;
  padding: var(--space-2);
  font-size: var(--font-size-xl);
  line-height: 1;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  width: 32px;
  height: 32px;
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
}

.modal-close:hover {
  background: var(--action-hover) !important;
  color: var(--text-primary) !important;
  background-color: var(--background-tertiary);
  box-shadow: 0 0 20px rgba(231, 76, 60, 0.6);
  border-color: rgba(231, 76, 60, 0.5);
}