/* 
 * EZKEY - Global Design System
 * สไตล์หลักที่ใช้ร่วมกันทั้งเว็บไซต์
 * Version: 3.0 - Unified Design System
 */

/* Import Inter and Prompt Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Prompt:wght@300;400;500;600;700&display=swap');

/* ===== CSS Variables ===== */
:root {
    /* Primary Brand Colors */
    --primary: #000000;
    --primary-dark: #000000;
    --primary-light: #333333;
    --primary-foreground: #ffffff;
    
    /* Background Colors */
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --foreground: #0f172a;
    
    /* Surface Colors */
    --surface: #ffffff;
    --surface-dark: #f1f5f9;
    --card: #ffffff;
    --card-foreground: #0f172a;
    
    /* Border Colors */
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --input: #e2e8f0;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --muted-foreground: #64748b;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    --destructive: #ef4444;
    --destructive-foreground: #ffffff;
    
    /* Accent Colors */
    --accent: #f1f5f9;
    --accent-foreground: #0f172a;
    
    /* Ring/Focus Colors */
    --ring: #000000;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius: 0.5rem;
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --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);
    --shadow-custom-light: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-custom-medium: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-custom-heavy: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Typography */
    --font-family: 'Inter', 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --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-size-5xl: 3rem;
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s 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;
}

/* ===== Base Styles ===== */
* {
    font-family: var(--font-family);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--background);
    color: var(--foreground);
    line-height: var(--line-height-normal);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* ===== Layout Classes ===== */
.container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@media (min-width: 640px) {
    .container { max-width: 640px; }
}

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

@media (min-width: 1024px) {
    .container { max-width: 1024px; }
}

@media (min-width: 1280px) {
    .container { max-width: 1280px; }
}

@media (min-width: 1536px) {
    .container { max-width: 1536px; }
}

/* ===== Component Base Classes ===== */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-custom-light);
    transition: var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-custom-medium);
    transform: translateY(-2px);
}

.glass-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-custom-light);
    transition: var(--transition-normal);
}

.glass-card:hover {
    box-shadow: var(--shadow-custom-medium);
    transform: translateY(-2px);
}

/* ===== Button Styles ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1;
    transition: var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    pointer-events: none;
    opacity: 0.5;
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-foreground);
    box-shadow: var(--shadow);
    padding: 0.75rem 1.5rem;
}

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

.btn-secondary {
    background: var(--background);
    color: var(--foreground);
    border: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
}

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

.btn-ghost {
    background: transparent;
    color: var(--foreground);
    padding: 0.75rem 1.5rem;
}

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

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
}

/* ===== Form Elements ===== */
.form-input {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    color: var(--foreground);
    background: var(--background);
    border: 1px solid var(--input);
    border-radius: var(--radius);
    transition: var(--transition-normal);
}

.form-input:focus {
    outline: none;
    border-color: var(--ring);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

.form-input::placeholder {
    color: var(--muted-foreground);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--foreground);
    margin-bottom: 0.5rem;
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--error);
    margin-top: 0.25rem;
}

/* ===== Typography ===== */
.text-primary {
    color: var(--text-primary);
}

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

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

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.95);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-up {
    animation: slideUp 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.5s ease-out;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* ===== Responsive Utilities ===== */
@media (max-width: 640px) {
    .sm\:hidden { display: none !important; }
    .sm\:block { display: block !important; }
}

@media (min-width: 641px) {
    .sm\:hidden { display: block !important; }
    .sm\:block { display: none !important; }
}

@media (max-width: 768px) {
    .md\:hidden { display: none !important; }
    .md\:block { display: block !important; }
}

@media (min-width: 769px) {
    .md\:hidden { display: block !important; }
    .md\:block { display: none !important; }
}

@media (max-width: 1024px) {
    .lg\:hidden { display: none !important; }
    .lg\:block { display: block !important; }
}

@media (min-width: 1025px) {
    .lg\:hidden { display: block !important; }
    .lg\:block { display: none !important; }
}

/* ===== Special Effects ===== */
.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--ring);
}

/* ===== Mobile Navigation ===== */
.mobile-nav-item {
    transition: var(--transition-normal);
}

.mobile-nav-item:hover {
    background: var(--accent);
}

.mobile-nav-item.active {
    color: var(--primary);
    font-weight: 600;
}

/* ===== Loading States ===== */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* ===== Print Styles ===== */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* ===== Additional Component Styles ===== */

/* Auth Form Styles */
.auth-form {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-custom-light);
    backdrop-filter: blur(10px);
}

.auth-input {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-normal);
    width: 100%;
}

.auth-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

.auth-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
}

.auth-link:hover {
    text-decoration: underline;
}

/* Product Card Styles */
.product-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-custom-light);
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-custom-medium);
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: var(--spacing-md);
}

.product-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.product-price {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.product-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
}

/* Filter Styles */
.filter-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-normal);
    cursor: pointer;
    font-weight: 500;
}

.filter-btn.active {
    background: var(--primary);
    color: var(--primary-foreground);
    border-color: var(--primary);
}

.filter-btn:hover {
    background: var(--accent);
    border-color: var(--primary);
}

/* Search Input Styles */
.search-input {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-normal);
    width: 100%;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

/* Navigation Styles */
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
}

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

.nav-link.active {
    color: var(--primary);
    background: var(--accent);
}

/* Hero Section Styles */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--primary-foreground);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-tight);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    font-weight: 400;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

/* Stats Section Styles */
.stats-item {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-custom-light);
    transition: var(--transition-normal);
}

.stats-item:hover {
    box-shadow: var(--shadow-custom-medium);
    transform: translateY(-2px);
}

.stats-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.stats-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Testimonial Styles */
.testimonial-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-custom-light);
    transition: var(--transition-normal);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-custom-medium);
    transform: translateY(-2px);
}

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.testimonial-author {
    font-weight: 600;
    color: var(--text-primary);
}

/* FAQ Styles */
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    margin-bottom: var(--spacing-md);
}

.faq-item:hover {
    box-shadow: var(--shadow-custom-light);
}

.faq-question {
    padding: var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* Contact Section Styles */
.contact-item {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-custom-light);
    transition: var(--transition-normal);
}

.contact-item:hover {
    box-shadow: var(--shadow-custom-medium);
    transform: translateY(-2px);
}

.contact-icon {
    font-size: var(--font-size-3xl);
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.contact-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-info {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-up {
    animation: slideUp 0.6s ease-out;
}

.bounce {
    animation: bounce 2s infinite;
}

.float {
    animation: float 3s ease-in-out infinite;
}

@keyframes fadeIn {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0px);
    }
    50% { 
        transform: translateY(-10px);
    }
}

/* Responsive Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 {
    grid-template-columns: 1fr;
}

.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);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .stats-number {
        font-size: var(--font-size-2xl);
    }
    
    .stats-item,
    .testimonial-card,
    .contact-item {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .card,
    .glass-card {
        padding: var(--spacing-md);
    }
}