/* ==========================================================================
   Platform IoT Rajo Tenun - Design System CSS
   Award-Winning UX Design Implementation
   ========================================================================== */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors - Identitas Tenun Palembang */
    --primary-red: #C41E3A;
    --primary-gold: #FFD700;
    --primary-burgundy: #800020;
    
    /* Secondary Colors */
    --secondary-teal: #008B8B;
    --secondary-amber: #FFA500;
    --secondary-green: #28A745;
    --secondary-blue: #007BFF;
    
    /* Neutral Colors */
    --neutral-black: #1A1A1A;
    --neutral-gray-800: #2D2D2D;
    --neutral-gray-600: #6C757D;
    --neutral-gray-300: #DEE2E6;
    --neutral-gray-100: #F8F9FA;
    --neutral-white: #FFFFFF;
    
    /* Status Colors */
    --status-success: #28A745;
    --status-warning: #FFC107;
    --status-danger: #DC3545;
    --status-info: #17A2B8;
    --status-pending: #6C757D;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Font Sizes - Fluid Typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;
    
    /* Spacing - 8px Grid */
    --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;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Animation */
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
    --easing: cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--neutral-black);
    background-color: var(--neutral-white);
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--primary-burgundy);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

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

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

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

/* ==========================================================================
   Layout Components
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

/* ==========================================================================
   Header / Navigation
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--neutral-gray-300);
    box-shadow: var(--shadow-sm);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    padding: 0 var(--space-4);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: var(--font-semibold);
    font-size: var(--text-lg);
    color: var(--primary-red);
}

.navbar-brand img {
    width: 40px;
    height: 40px;
}

.navbar-menu {
    display: none;
    align-items: center;
    gap: var(--space-6);
    font-size: var(--text-sm);
}

@media (min-width: 768px) {
    .navbar-menu {
        display: flex;
    }
}

.navbar-menu a {
    display: inline-flex;
    align-items: center;
    color: var(--neutral-gray-800);
    text-decoration: none;
    transition: color var(--duration-fast) var(--easing);
}

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

.navbar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background-color var(--duration-fast) var(--easing);
}

.navbar-toggle:hover {
    background-color: var(--neutral-gray-100);
}

@media (min-width: 768px) {
    .navbar-toggle {
        display: none;
    }
}

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4);
    border-top: 1px solid var(--neutral-gray-300);
}

.mobile-menu.active {
    display: flex;
}

@media (min-width: 768px) {
    .mobile-menu {
        display: none !important;
    }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(to bottom, #FFF5F5, var(--neutral-white));
    padding: var(--space-16) 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0l30 30-30 30L0 30z' fill='%23FFD700' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.3;
}

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

.hero-grid {
    display: grid;
    gap: var(--space-8);
    align-items: center;
}

@media (min-width: 768px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-title {
    color: var(--primary-red);
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--primary-burgundy);
    margin-bottom: var(--space-3);
}

.hero-description {
    color: var(--neutral-gray-600);
    margin-bottom: var(--space-6);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.hero-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    height: 40px;
    padding: 0 var(--space-6);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--duration-fast) var(--easing);
    text-decoration: none;
    white-space: nowrap;
}

@media (min-width: 640px) {
    .btn {
        height: 44px;
    }
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary-red);
    color: var(--neutral-white);
}

.btn-primary:hover {
    background-color: var(--primary-burgundy);
    color: var(--neutral-white);
}

.btn-secondary {
    background-color: var(--neutral-white);
    border-color: var(--primary-red);
    color: var(--primary-red);
}

.btn-secondary:hover {
    background-color: #FFF5F5;
}

.btn-tertiary {
    background-color: transparent;
    color: var(--primary-red);
}

.btn-tertiary:hover {
    background-color: var(--neutral-gray-100);
}

.btn-gold {
    background: linear-gradient(135deg, var(--primary-gold) 0%, #FFA500 100%);
    color: var(--neutral-black);
    border: none;
}

.btn-gold:hover {
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background: var(--neutral-white);
    border: 1px solid var(--neutral-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--easing);
}

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

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--primary-burgundy);
}

.card-body {
    color: var(--neutral-gray-600);
    font-size: var(--text-sm);
}

.card-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--neutral-gray-300);
}

/* Product Cards */
.product-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--neutral-white);
    border: 1px solid var(--neutral-gray-300);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--duration-normal) var(--easing);
}

.product-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.product-image {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: #FAFAFA;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    padding: 1rem;
    transition: transform var(--duration-slow) var(--easing);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: var(--primary-gold);
    color: var(--neutral-black);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

.product-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
}

.product-category {
    font-size: var(--text-xs);
    color: var(--neutral-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.product-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--primary-burgundy);
    margin-bottom: var(--space-3);
    line-height: var(--leading-tight);
}

.product-description {
    font-size: var(--text-sm);
    color: var(--neutral-gray-600);
    line-height: var(--leading-normal);
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--neutral-gray-300);
}

.product-price {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--primary-red);
}

.product-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: var(--space-4);
}

.product-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.625rem 1rem;
    margin-top: auto;
    margin-bottom: 0;
    background: linear-gradient(135deg, var(--primary-red), var(--primary-burgundy));
    color: var(--neutral-white);
    font-size: 0.875rem;
    font-weight: var(--font-semibold);
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(196, 30, 58, 0.2);
}

.product-action:hover {
    background: linear-gradient(135deg, var(--primary-burgundy), var(--primary-red));
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.4);
    transform: translateY(-2px);
}

.product-action:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(196, 30, 58, 0.3);
}

.product-action svg {
    width: 18px;
    height: 18px;
}

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

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

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

@media (max-width: 767px) {
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   Status Badges
   ========================================================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
}

.badge-success {
    background-color: #D1FAE5;
    color: var(--status-success);
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-danger {
    background-color: #FEE2E2;
    color: var(--status-danger);
}

.badge-info {
    background-color: #DBEAFE;
    color: var(--secondary-blue);
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-red), var(--primary-burgundy));
    color: var(--neutral-white);
    font-weight: var(--font-semibold);
    box-shadow: 0 2px 8px rgba(196, 30, 58, 0.3);
    backdrop-filter: blur(8px);
}

/* ==========================================================================
   Stats / Metrics
   ========================================================================== */

.stat-card {
    background: var(--neutral-white);
    border: 1px solid var(--neutral-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    text-align: center;
}

.stat-value {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--primary-red);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--neutral-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

.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-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); }

.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }

/* Loading Animation */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--neutral-gray-300);
    border-top-color: var(--primary-red);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.fade-in {
    animation: fadeIn var(--duration-normal) var(--easing);
}

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

@media (max-width: 767px) {
    body {
        font-size: 16px; /* Prevent zoom on input focus */
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .site-header,
    .navbar-toggle,
    .mobile-menu,
    .btn {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}