/**
 * Design System - Core Variables & Utilities
 * ระบบออกแบบหลักสำหรับเว็บไซต์
 */

:root {
    /* ========== Color Palette ========== */

    /* Primary Colors */
    --primary-red: #ff3c3c;
    --primary-red-hover: #ff6b6b;
    --primary-red-dark: #cc3030;
    --primary-red-glow: rgba(255, 60, 60, 0.3);
    --primary-red-light: rgba(255, 60, 60, 0.1);

    /* Background Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-bg-hover: rgba(255, 255, 255, 0.05);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.5);
    --text-disabled: rgba(255, 255, 255, 0.3);

    /* Status Colors */
    --success-green: #22c55e;
    --success-green-bg: rgba(34, 197, 94, 0.15);
    --success-green-border: rgba(34, 197, 94, 0.3);

    --warning-yellow: #fbbf24;
    --warning-yellow-bg: rgba(251, 191, 36, 0.15);
    --warning-yellow-border: rgba(251, 191, 36, 0.3);

    --error-red: #ef4444;
    --error-red-bg: rgba(239, 68, 68, 0.15);
    --error-red-border: rgba(239, 68, 68, 0.3);

    --info-blue: #3b82f6;
    --info-blue-bg: rgba(59, 130, 246, 0.15);
    --info-blue-border: rgba(59, 130, 246, 0.3);

    /* Border & Divider */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-hover: rgba(255, 255, 255, 0.2);
    --divider-color: rgba(255, 255, 255, 0.05);

    /* ========== Typography ========== */

    /* Font Families */
    --font-primary: 'Prompt', sans-serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

    /* Font Sizes */
    --text-xs: 12px;
    --text-sm: 14px;
    --text-base: 16px;
    --text-lg: 18px;
    --text-xl: 20px;
    --text-2xl: 24px;
    --text-3xl: 32px;
    --text-4xl: 40px;
    --text-5xl: 48px;

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

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;

    /* ========== Spacing ========== */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    /* ========== Border Radius ========== */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* ========== Shadows ========== */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.4);
    --shadow-glow: none;
    --shadow-glow-lg: none;

    /* ========== Transitions ========== */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* ========== 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;
}

/* ========== Base Styles ========== */

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== Typography Utilities ========== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-md);
}

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

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

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

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

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

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

p {
    margin-bottom: var(--space-md);
}

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

a:hover {
    color: var(--primary-red-hover);
}

/* ========== Container & Layout ========== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: 800px;
}

.container-wide {
    max-width: 1400px;
}

/* ========== Grid System ========== */

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

.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: 768px) {

    .grid-cols-4,
    .grid-cols-3,
    .grid-cols-2 {
        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-sm {
    gap: var(--space-sm);
}

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

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

/* ========== Spacing Utilities ========== */

.m-0 {
    margin: 0;
}

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

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

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

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

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

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

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

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

.p-sm {
    padding: var(--space-sm);
}

.p-md {
    padding: var(--space-md);
}

.p-lg {
    padding: var(--space-lg);
}

.p-xl {
    padding: var(--space-xl);
}

/* ========== Text Utilities ========== */

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

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

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

.text-primary {
    color: var(--text-primary);
}

.text-secondary {
    color: var(--text-secondary);
}

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

.text-red {
    color: var(--primary-red);
}

.text-success {
    color: var(--success-green);
}

.text-warning {
    color: var(--warning-yellow);
}

.text-error {
    color: var(--error-red);
}

.font-normal {
    font-weight: var(--font-normal);
}

.font-medium {
    font-weight: var(--font-medium);
}

.font-semibold {
    font-weight: var(--font-semibold);
}

.font-bold {
    font-weight: var(--font-bold);
}

.text-xs {
    font-size: var(--text-xs);
}

.text-sm {
    font-size: var(--text-sm);
}

.text-base {
    font-size: var(--text-base);
}

.text-lg {
    font-size: var(--text-lg);
}

.text-xl {
    font-size: var(--text-xl);
}

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

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

/* ========== Display Utilities ========== */

.hidden {
    display: none;
}

.block {
    display: block;
}

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

@media (max-width: 768px) {
    .hidden-mobile {
        display: none;
    }
}

@media (min-width: 769px) {
    .hidden-desktop {
        display: none;
    }
}

/* ========== Animation Utilities ========== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.animate-fade-in {
    animation: fadeIn var(--transition-base);
}

.animate-slide-up {
    animation: slideUp var(--transition-base);
}

.animate-slide-down {
    animation: slideDown var(--transition-base);
}

/* ========== Scrollbar Styling ========== */

::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ========== Selection Styling ========== */

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

::-moz-selection {
    background: var(--primary-red);
    color: white;
}