/* ========================================
   iReStore — Swatch-Inspired Design
   Premium Secondhand iPhone Store
   WITH DARK / LIGHT MODE SUPPORT
   ======================================== */

/* ---------- CSS Variables (LIGHT MODE) ---------- */
:root {
    --primary: #e8175d;
    --primary-dark: #c41250;
    --primary-light: #ff3d71;
    --accent: #ff6b35;
    --gradient-primary: linear-gradient(135deg, #e8175d 0%, #ff6b35 100%);

    /* Light Mode Colors */
    --bg-body: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.97);
    --bg-footer: #0a0a0a;
    --bg-hero: #0a0a0a;
    --bg-why-us: #0a0a0a;

    --text-primary: #0a0a0a;
    --text-secondary: #333333;
    --text-muted: #777777;
    --text-light: #999999;
    --text-placeholder: #bbbbbb;

    --border-color: #eeeeee;
    --border-light: #f5f5f5;
    --divider: #dddddd;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --shadow-xl: 0 16px 60px rgba(0,0,0,0.2);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Status colors */
    --success: #2ecc71;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
}

/* ---------- DARK MODE ---------- */
[data-theme="dark"] {
    --bg-body: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #1a1a1a;
    --bg-input: #222222;
    --bg-nav: rgba(15, 15, 15, 0.97);
    --bg-footer: #050505;

    --text-primary: #f0f0f0;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    --text-light: #777777;
    --text-placeholder: #555555;

    --border-color: #2a2a2a;
    --border-light: #222222;
    --divider: #333333;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --shadow-xl: 0 16px 60px rgba(0,0,0,0.6);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
    background: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

/* ---------- Container ---------- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Typography ---------- */
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800; line-height: 1.1; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; line-height: 1.2; }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 600; line-height: 1.3; }

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    border-color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(232, 23, 93, 0.35);
}

.btn-outline {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
    background: #ffffff;
    color: #0a0a0a;
    border-color: #ffffff;
    transform: translateY(-2px);
}

.btn-dark {
    background: var(--text-primary);
    color: var(--bg-body);
    border-color: var(--text-primary);
}

.btn-dark:hover {
    opacity: 0.85;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1rem;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.85rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ---------- Announcement Bar ---------- */
.announcement-bar {
    background: #0a0a0a;
    color: #ffffff;
    padding: 10px 0;
    font-size: 0.82rem;
    text-align: center;
    letter-spacing: 0.3px;
}

.announcement-bar i {
    color: var(--primary-light);
    margin-right: 4px;
}

/* ---------- Navbar ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
}

.logo-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #ffffff;
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.logo-accent {
    color: var(--primary);
}

/* Nav Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-links > li > a {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-links > li > a:hover,
.nav-links > li > a.active {
    color: var(--primary);
    background: rgba(232, 23, 93, 0.06);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown > a {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 5px;
}

.dropdown > a .fa-chevron-down {
    font-size: 0.65rem;
    transition: var(--transition);
}

.dropdown:hover > a {
    color: var(--primary);
}

.dropdown:hover .fa-chevron-down {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-card);
    min-width: 220px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
    border: 1px solid var(--border-color);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 16px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.dropdown-menu li a:hover {
    background: var(--bg-secondary);
    color: var(--primary);
    padding-left: 22px;
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-icon-btn {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-muted);
    transition: var(--transition);
    font-size: 1rem;
}

.nav-icon-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

/* ---------- Theme Toggle Button ---------- */
.theme-toggle {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-muted);
    transition: var(--transition);
    font-size: 1.05rem;
    cursor: pointer;
    background: none;
    border: none;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    color: var(--primary);
    transform: rotate(15deg);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

.theme-toggle .icon-moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="dark"] .theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="dark"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}

/* ---------- Hamburger ---------- */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 4px 0;
}

.hamburger span {
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Search Overlay ---------- */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 18vh;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 2000;
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-overlay-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
    max-width: 680px;
    padding: 0 24px;
}

/* Search form container */
.search-overlay-content form {
    width: 100%;
    display: flex;
    align-items: center;
    border-bottom: 3px solid var(--primary);
    padding-bottom: 12px;
}

/* Search input field */
.search-overlay-content input[type="text"] {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: #ffffff !important;
    font-size: 2.2rem;
    font-weight: 300;
    padding: 16px 0;
    caret-color: var(--primary);
    letter-spacing: -0.5px;
}

.search-overlay-content input[type="text"]::placeholder {
    color: rgba(255, 255, 255, 0.5) !important;
    font-weight: 300;
}

.search-overlay-content input[type="text"]::selection {
    background: var(--primary);
    color: #ffffff;
}

/* Search submit button */
.search-overlay-content form button {
    color: var(--primary);
    font-size: 1.6rem;
    padding: 16px 8px;
    transition: var(--transition);
    background: transparent;
    border: none;
    cursor: pointer;
}

.search-overlay-content form button:hover {
    color: #ffffff;
    transform: translateX(4px);
}

/* Close search button */
.close-search {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.5rem;
    padding: 12px;
    transition: var(--transition);
    background: transparent;
    border: none;
    cursor: pointer;
}

.close-search:hover {
    color: #ffffff;
    transform: rotate(90deg);
}

/* Search hint text */
.search-hint {
    color: rgba(255, 255, 255, 0.35);
    font-size: 0.85rem;
    text-align: center;
    letter-spacing: 0.5px;
}

.search-hint kbd {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: inherit;
    color: rgba(255, 255, 255, 0.5);
    margin: 0 2px;
}

/* Popular searches tags */
.search-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 8px;
}

.search-tag {
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 30px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.search-tag:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    transform: translateY(-2px);
}

/* Search overlay animation for content */
.search-overlay.active .search-overlay-content {
    animation: searchSlideUp 0.4s ease forwards;
}

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

/* Responsive search */
@media (max-width: 768px) {
    .search-overlay {
        padding-top: 12vh;
    }

    .search-overlay-content input[type="text"] {
        font-size: 1.5rem;
    }

    .search-tags {
        gap: 8px;
    }

    .search-tag {
        padding: 6px 14px;
        font-size: 0.78rem;
    }
}

@media (max-width: 480px) {
    .search-overlay-content input[type="text"] {
        font-size: 1.2rem;
    }
}

/* ---------- Mobile Menu ---------- */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    background: var(--bg-card);
    z-index: 3000;
    transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-header .logo-text {
    font-size: 1.4rem;
    font-weight: 800;
}

.close-mobile {
    font-size: 1.3rem;
    color: var(--text-muted);
    padding: 8px;
}

.mobile-nav-links li a {
    display: block;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.mobile-nav-links li a:hover {
    color: var(--primary);
    padding-left: 30px;
    background: rgba(232, 23, 93, 0.04);
}

.mobile-dropdown-header {
    padding: 14px 24px 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-light);
}

.mobile-sub-link a {
    padding-left: 40px !important;
    font-size: 0.92rem !important;
    color: var(--text-light) !important;
}

.mobile-divider {
    height: 1px;
    background: var(--border-color);
    margin: 8px 0;
}

/* Mobile theme toggle */
.mobile-theme-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.mobile-theme-toggle:hover {
    color: var(--primary);
    background: rgba(232, 23, 93, 0.04);
}

.mobile-theme-toggle i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 92vh;
    overflow: hidden;
}

.hero-slide {
    min-height: 92vh;
    display: none;
    align-items: center;
}

.hero-slide.active {
    display: flex;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0;
}

.hero-text {
    color: #ffffff;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.hero h1 {
    margin-bottom: 20px;
    color: #ffffff;
}

.hero p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    max-width: 480px;
    line-height: 1.7;
}

.hero-price {
    margin-bottom: 36px;
}

.hero-price .from {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    display: block;
    margin-bottom: 4px;
}

.hero-price .price {
    font-size: 2.4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero Image */
.hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-showcase {
    position: relative;
    width: 300px;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-glow {
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.15;
    filter: blur(80px);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.15; }
    50% { transform: scale(1.2); opacity: 0.25; }
}

.phone-mockup {
    position: relative;
    z-index: 1;
    width: 220px;
    height: 420px;
    background: linear-gradient(145deg, #2d2d2d, #1a1a1a);
    border-radius: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
    color: #777777;
    border: 3px solid #555555;
    box-shadow: 0 30px 60px rgba(0,0,0,0.4), inset 0 0 30px rgba(255,255,255,0.05);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(2deg); }
    50% { transform: translateY(-20px) rotate(-2deg); }
}

/* Hero Indicators */
.hero-indicators {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.hero-indicators span {
    width: 40px;
    height: 4px;
    background: rgba(255,255,255,0.3);
    border-radius: 4px;
    transition: var(--transition);
}

.hero-indicators span.active {
    background: var(--primary);
    width: 60px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
    letter-spacing: 1px;
}

.scroll-line {
    width: 1px;
    height: 30px;
    background: rgba(255,255,255,0.2);
    margin: 8px auto 0;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { top: -100%; }
    100% { top: 100%; }
}

/* ---------- Stats Bar ---------- */
.stats-bar {
    background: var(--bg-card);
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-icon {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ---------- Section Styles ---------- */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(232, 23, 93, 0.08);
    color: var(--primary);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-top: 12px;
}

.section-cta {
    text-align: center;
    margin-top: 40px;
}

/* ---------- Models Grid ---------- */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.model-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.model-card-inner {
    padding: 28px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.model-card:hover .model-card-inner {
    background: #0a0a0a;
    color: #ffffff;
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.model-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: 50%;
    font-size: 1.3rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.model-card:hover .model-icon {
    background: var(--gradient-primary);
    color: #ffffff;
}

.model-card h3 {
    font-size: 0.95rem;
    margin-bottom: 6px;
}

.model-count {
    font-size: 0.8rem;
    color: var(--text-light);
}

.model-card:hover .model-count {
    color: rgba(255,255,255,0.6);
}

.model-arrow {
    display: inline-block;
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--primary);
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition);
}

.model-card:hover .model-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ---------- Product Cards ---------- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: block;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.product-image {
    position: relative;
    background: var(--bg-secondary);
    padding: 30px;
    text-align: center;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
}

.product-image-placeholder i {
    font-size: 3.5rem;
    color: var(--text-placeholder);
}

.product-image-placeholder span {
    font-size: 0.8rem;
    font-weight: 500;
}

.product-badges {
    position: absolute;
    top: 12px;
    left: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-xl);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #ffffff;
}

.badge-discount {
    background: var(--danger);
}

.product-time {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 0.72rem;
    color: var(--text-light);
    background: var(--bg-card);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
}

.product-info {
    padding: 20px;
}

.product-model {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 6px 0 12px;
    line-height: 1.4;
    color: var(--text-primary);
}

.product-specs {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.product-specs span {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.product-specs span i {
    font-size: 0.7rem;
    color: var(--text-light);
}

.product-pricing {
    display: flex;
    align-items: center;
    gap: 10px;
}

.current-price {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

.original-price {
    font-size: 0.9rem;
    color: var(--text-light);
    text-decoration: line-through;
}

/* ---------- Featured Section ---------- */
.featured-section {
    background: var(--bg-secondary);
}

/* ---------- Why Us Section ---------- */
.why-us-section {
    background: #0a0a0a;
    color: #ffffff;
}

.why-us-section .section-tag {
    background: rgba(232, 23, 93, 0.2);
}

.why-us-section .section-header p {
    color: rgba(255,255,255,0.5);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 36px 28px;
    background: #1a1a1a;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid #222222;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(232, 23, 93, 0.15);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 1.4rem;
    color: #ffffff;
}

.feature-card h3 {
    margin-bottom: 10px;
    color: #ffffff;
}

.feature-card p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
    padding: 80px 0;
    background: var(--gradient-primary);
    text-align: center;
    color: #ffffff;
}

.cta-content h2 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    color: #ffffff;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 28px;
}

.cta-content .btn-outline {
    border-color: #ffffff;
}

/* ---------- Contact Section ---------- */
.contact-section {
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: start;
}

.contact-info-panel h2 {
    margin-bottom: 16px;
}

.contact-info-panel > p {
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-detail-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.contact-detail-item .icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: #ffffff;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.contact-detail-item h4 {
    font-size: 0.95rem;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.contact-detail-item p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.contact-form-panel {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.contact-form-panel h3 {
    font-size: 1.3rem;
    margin-bottom: 24px;
    color: var(--text-primary);
}

/* ---------- Forms ---------- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-input);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(232, 23, 93, 0.1);
}

.form-control::placeholder {
    color: var(--text-placeholder);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

select.form-control {
    cursor: pointer;
    appearance: auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ---------- Filter Bar ---------- */
.filter-bar {
    background: var(--bg-card);
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 70px;
    z-index: 50;
}

.filter-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.filter-tabs {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 18px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

.filter-tab:hover,
.filter-tab.active {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(232, 23, 93, 0.06);
}

.filter-sort select {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    color: var(--text-muted);
    background: var(--bg-input);
    cursor: pointer;
}

/* ---------- Products Page Header ---------- */
.page-header {
    padding: 50px 0 30px;
    text-align: center;
}

.page-header h1 {
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-light);
}

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

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

.breadcrumbs .separator {
    font-size: 0.7rem;
}

/* ---------- Product Detail Page ---------- */
.product-detail {
    padding: 40px 0 80px;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.gallery-main {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.gallery-main i {
    font-size: 8rem;
    color: var(--text-placeholder);
}

.gallery-thumbs {
    display: flex;
    gap: 10px;
}

.gallery-thumb {
    flex: 1;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 12px;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.gallery-thumb.active,
.gallery-thumb:hover {
    border-color: var(--primary);
}

.gallery-thumb i {
    font-size: 1.5rem;
    color: var(--text-placeholder);
}

/* Product Detail Info */
.product-detail-info .product-model {
    font-size: 0.8rem;
    margin-bottom: 8px;
    display: block;
}

.product-detail-info h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.product-detail-pricing {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.product-detail-pricing .current-price {
    font-size: 2rem;
}

.product-detail-pricing .original-price {
    font-size: 1.1rem;
}

.discount-tag {
    padding: 4px 12px;
    background: var(--danger);
    color: #ffffff;
    border-radius: var(--radius-xl);
    font-size: 0.78rem;
    font-weight: 700;
}

/* Specs List */
.specs-list {
    margin-bottom: 24px;
}

.specs-list h3 {
    font-size: 1rem;
    margin-bottom: 14px;
    color: var(--text-secondary);
}

.spec-row {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
}

.spec-label {
    width: 140px;
    font-size: 0.88rem;
    color: var(--text-light);
    font-weight: 500;
}

.spec-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

/* Condition Badge */
.condition-badge-large {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 24px;
}

/* Battery Health Bar */
.battery-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    margin-top: 6px;
}

.battery-fill {
    height: 100%;
    border-radius: 8px;
    transition: width 1s ease;
}

/* Action Buttons */
.product-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.product-actions .btn {
    flex: 1;
}

/* Description */
.product-description {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.product-description h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.product-description p {
    color: var(--text-muted);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ---------- Auth Pages ---------- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    padding: 40px 24px;
    transition: background 0.3s ease;
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.auth-card .logo {
    justify-content: center;
    margin-bottom: 30px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 1.5rem;
}

.auth-card .subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 30px;
    font-size: 0.92rem;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.auth-footer a {
    color: var(--primary);
    font-weight: 600;
}

/* Alert Messages */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error {
    background: #fde8e8;
    color: var(--danger);
    border: 1px solid #f8c4c4;
}

.alert-success {
    background: #e8fde8;
    color: var(--success);
    border: 1px solid #c4f8c4;
}

/* ---------- Admin Page ---------- */
.admin-page {
    padding: 30px 0 60px;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
}

.admin-header h1 {
    font-size: 1.6rem;
}

.admin-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.admin-tab {
    padding: 10px 22px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

.admin-tab.active,
.admin-tab:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.admin-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.admin-card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-card-header h3 {
    font-size: 1.1rem;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 14px 18px;
    text-align: left;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--border-light);
}

table th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--bg-secondary);
}

table td {
    color: var(--text-secondary);
}

table tr:hover td {
    background: rgba(232, 23, 93, 0.02);
}

.status-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--radius-xl);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
}

.status-active {
    background: #e8fde8;
    color: var(--success);
}

.status-sold {
    background: #fde8e8;
    color: var(--danger);
}

.status-unread {
    background: #fff3e0;
    color: var(--warning);
}

/* Admin Form */
.admin-form-section {
    display: none;
    padding: 24px;
}

.admin-form-section.active {
    display: block;
}

/* ---------- Footer ---------- */
.footer {
    background: #0a0a0a;
    color: rgba(255,255,255,0.7);
    padding-top: 60px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #222222;
}

.footer-col h3,
.footer-col h4 {
    color: #ffffff;
    margin-bottom: 16px;
}

.footer-col p {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.contact-info li i {
    color: var(--primary);
    width: 16px;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a1a1a;
    border-radius: 50%;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--gradient-primary);
    color: #ffffff;
    transform: translateY(-3px);
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.3);
}

.footer-badges {
    display: flex;
    gap: 20px;
}

.footer-badges span {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-badges span i {
    color: var(--primary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero p { max-width: 100%; }
    .hero-buttons { justify-content: center; }
    .hero-image { display: none; }
    .contact-grid { grid-template-columns: 1fr; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .gallery-main { position: static; }
    .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .products-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
    .form-row { grid-template-columns: 1fr; }
    .filter-container {
        flex-direction: column;
        align-items: stretch;
    }
    .filter-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 8px;
    }
    .filter-tab { white-space: nowrap; }
    .footer-top { grid-template-columns: 1fr; }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .footer-badges {
        flex-wrap: wrap;
        justify-content: center;
    }
    .auth-card { padding: 32px 24px; }
    .product-actions { flex-direction: column; }
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    .hero { min-height: 80vh; }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .stat-item { padding: 12px; }
    .stat-number { font-size: 1.5rem; }
    .products-grid { grid-template-columns: 1fr; }
    .models-grid { grid-template-columns: repeat(2, 1fr); }
}