/* ==========================================================================
   Plasma Việt Nam - Stylesheet
   Product: Cord Arc (Cold Plasma System)
   Design System: Dark Indigo & Plasma Glow Cyan
   ========================================================================== */

:root {
    --bg-main: #0a0d16;
    --bg-card: #121826;
    --bg-card-hover: #192135;
    --border-color: rgba(0, 242, 254, 0.15);
    --border-hover: rgba(0, 242, 254, 0.4);
    
    --color-primary: #00f2fe; /* Plasma Cyan */
    --color-secondary: #4facfe; /* Electric Blue */
    --color-accent: #fbbf24; /* Amber Gold for Promotion */
    --color-text-main: #f3f4f6;
    --color-text-muted: #9ca3af;
    --color-text-dark: #1f2937;
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    --shadow-glow: 0 0 15px rgba(0, 242, 254, 0.25);
    --shadow-glow-strong: 0 0 25px rgba(0, 242, 254, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    background-color: var(--bg-main);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 0.5rem;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center { text-align: center; }
.hidden { display: none !important; }

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    align-items: center;
}

/* Utility Badges & Buttons */
.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    border: 1px solid var(--color-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    background: rgba(0, 242, 254, 0.05);
    box-shadow: var(--shadow-glow);
}

.pulse-tag {
    animation: tagPulse 2s infinite alternate;
}

@keyframes tagPulse {
    0% { box-shadow: 0 0 5px rgba(0, 242, 254, 0.2); }
    100% { box-shadow: 0 0 15px rgba(0, 242, 254, 0.6); }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 0.75rem 1.75rem;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    gap: 0.5rem;
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-text-dark);
    font-weight: 700;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: rgba(0, 242, 254, 0.1);
    color: #fff;
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-text-dark);
    font-weight: 700;
    box-shadow: 0 0 10px rgba(251, 191, 36, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.6);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 30%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* ==========================================================================
   Header Section
   ========================================================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 13, 22, 0.75);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

header.scrolled {
    background: rgba(10, 13, 22, 0.95);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(0, 242, 254, 0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--color-primary);
    text-shadow: var(--shadow-glow);
}

.logo-icon {
    color: var(--color-primary);
    filter: drop-shadow(0 0 5px var(--color-primary));
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

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

.promo-highlight {
    color: var(--color-accent) !important;
    font-weight: 600;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Mobile Nav Overlay */
.mobile-nav {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: none;
    flex-direction: column;
    gap: 1.5rem;
    z-index: 999;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

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

.mobile-link {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 500;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    position: relative;
    padding-top: 160px;
    padding-bottom: 80px;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, rgba(79, 172, 254, 0.05) 50%, transparent 100%);
    filter: blur(80px);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.15;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    max-width: 540px;
}

.hero-highlights {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.highlight-item i {
    color: var(--color-primary);
    font-size: 1.2rem;
    text-shadow: var(--shadow-glow);
}

.highlight-item span {
    font-size: 1rem;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 1.25rem;
}

.hero-image-wrapper {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
}

.hero-image-card {
    position: relative;
    border-radius: 20px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), var(--shadow-glow);
    overflow: hidden;
    transition: var(--transition);
}

.hero-image-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), var(--shadow-glow-strong);
}

.hero-img {
    border-radius: 12px;
    width: 100%;
    object-fit: cover;
}

.floating-badge {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--color-accent), #f59e0b);
    color: var(--color-text-dark);
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: var(--font-heading);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.4);
    animation: bounce 3s infinite;
}

.badge-num {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

.badge-txt {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 242, 254, 0.1);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    text-shadow: var(--shadow-glow);
}

/* ==========================================================================
   Countdown Strip
   ========================================================================== */
.countdown-strip {
    background: linear-gradient(90deg, #111827, #030712, #111827);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 0;
    position: relative;
    z-index: 10;
}

.countdown-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.countdown-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #fff;
}

.countdown-title i {
    color: var(--color-primary);
    animation: flash 1s infinite alternate;
}

@keyframes flash {
    0% { opacity: 0.3; }
    100% { opacity: 1; }
}

.countdown {
    display: flex;
    gap: 1rem;
}

.time-block {
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    min-width: 70px;
    text-align: center;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.time-block span {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    text-shadow: var(--shadow-glow);
    line-height: 1.1;
    margin-bottom: 2px;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-section {
    padding: 100px 0;
    position: relative;
}

.about-image {
    position: relative;
    display: flex;
    justify-content: center;
}

.about-img {
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.about-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.lead-text {
    font-size: 1.15rem;
    color: #fff;
    margin-bottom: 1.25rem;
    font-weight: 500;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.feat-item {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.feat-icon-box {
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid var(--border-color);
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-primary);
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow);
}

.feat-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: #fff;
}

.feat-item p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   Heads Section
   ========================================================================== */
.heads-section {
    padding: 100px 0;
    background: rgba(255, 255, 255, 0.01);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.section-header {
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

.heads-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.head-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.25rem 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.head-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    transition: var(--transition);
}

.head-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.head-card:hover::before {
    opacity: 1;
}

.head-icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 5px rgba(0, 242, 254, 0.3));
}

.head-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #fff;
}

.head-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.55;
}

/* ==========================================================================
   Product Slider Gallery
   ========================================================================== */
.gallery-section {
    padding: 100px 0;
}

.slider-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    min-width: 100%;
    position: relative;
    cursor: zoom-in;
    aspect-ratio: 1 / 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 13, 22, 0.4);
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    gap: 0.5rem;
    transition: var(--transition);
}

.slide:hover .slide-overlay {
    opacity: 1;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(10, 13, 22, 0.7);
    border: 1px solid var(--border-color);
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
}

.slider-btn:hover {
    background: var(--color-primary);
    color: var(--color-text-dark);
    box-shadow: var(--shadow-glow);
}

.slider-btn.prev { left: 15px; }
.slider-btn.next { right: 15px; }

.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--color-primary);
    width: 20px;
    box-shadow: var(--shadow-glow);
}

/* Lightbox Modal */
.lightbox-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.95);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.lightbox-modal.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 70vh;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-glow-strong);
}

.lightbox-caption {
    margin-top: 15px;
    font-size: 1.1rem;
    color: #fff;
    text-align: center;
}

.lightbox-close {
    position: absolute;
    top: 25px;
    right: 30px;
    color: #fff;
    font-size: 2.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.lightbox-close:hover {
    color: var(--color-primary);
}

.lightbox-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition);
}

.lightbox-btn:hover {
    background: var(--color-primary);
    color: var(--color-text-dark);
}

.lightbox-btn.prev { left: 30px; }
.lightbox-btn.next { right: 30px; }

/* ==========================================================================
   Applications Section
   ========================================================================== */
.applications-section {
    padding: 100px 0;
    background: rgba(255, 255, 255, 0.01);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    margin-top: 2rem;
}

.app-column {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 3rem 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.app-column h3 {
    font-size: 1.6rem;
    color: #fff;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding-bottom: 1rem;
}

.app-column h3 i {
    color: var(--color-primary);
}

.app-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.app-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 1.05rem;
    color: var(--color-text-muted);
}

.app-list li i {
    color: var(--color-primary);
    margin-top: 4px;
    font-size: 1.1rem;
}

/* ==========================================================================
   Technical Specs Section
   ========================================================================== */
.specs-section {
    padding: 100px 0;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
}

.specs-table tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.specs-table td {
    padding: 1.25rem 1rem;
    font-size: 1rem;
}

.specs-table td:first-child {
    color: var(--color-primary);
    font-weight: 600;
    width: 40%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.specs-table td:last-child {
    color: #fff;
    font-weight: 500;
}

.specs-banner {
    display: flex;
    justify-content: center;
}

.specs-card {
    background: linear-gradient(145deg, #121826 0%, #0c101a 100%);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), var(--shadow-glow);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.specs-card h3 {
    color: #fff;
    font-size: 1.4rem;
    margin-bottom: 2rem;
    text-align: center;
    letter-spacing: 0.05em;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding-bottom: 1rem;
}

.glow-point {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 70%);
    filter: blur(20px);
}

.perks-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.perks-list li {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.perks-list li i {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin-top: 3px;
    text-shadow: var(--shadow-glow);
}

.perks-list h4 {
    font-size: 1.15rem;
    color: #fff;
    margin-bottom: 0.25rem;
}

.perks-list p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ==========================================================================
   Promotion & Price Section
   ========================================================================== */
.promotion-section {
    padding: 100px 0;
    background: radial-gradient(circle at center, rgba(0, 242, 254, 0.05) 0%, transparent 70%);
}

.promo-heading {
    font-size: 3rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.promo-desc {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 3.5rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.price-box {
    background: rgba(18, 24, 38, 0.7);
    border: 2px solid var(--color-primary);
    border-radius: 24px;
    padding: 3.5rem 2.5rem;
    max-width: 650px;
    margin: 0 auto 4rem auto;
    box-shadow: var(--shadow-glow-strong), 0 15px 40px rgba(0,0,0,0.5);
    position: relative;
    overflow: hidden;
}

.price-box::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0,242,254,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.old-price {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    text-decoration: line-through;
    margin-bottom: 0.5rem;
}

.new-price {
    font-size: 4.5rem;
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--color-accent);
    text-shadow: 0 0 20px rgba(251, 191, 36, 0.4);
    line-height: 1;
    margin-bottom: 1rem;
}

.price-limit {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #fff;
    margin-bottom: 0.75rem;
}

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

.suat-con-lai {
    font-size: 1.25rem;
    background: rgba(251, 191, 36, 0.1);
    color: var(--color-accent);
    border: 1px dashed var(--color-accent);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    display: inline-block;
    font-weight: 600;
}

.gifts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.gift-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    position: relative;
    transition: var(--transition);
}

.gift-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.gift-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 1rem;
    border-radius: 50px;
    text-transform: uppercase;
}

.gift-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.text-yellow {
    color: var(--color-accent) !important;
}

.gift-card h4 {
    font-size: 1.2rem;
    color: #fff;
    margin-bottom: 0.75rem;
}

.gift-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.main-gift {
    border: 1px solid rgba(251, 191, 36, 0.3);
    background: rgba(251, 191, 36, 0.02);
}

.glow-badge {
    background: var(--color-accent) !important;
    color: var(--color-text-dark) !important;
    border: none !important;
    box-shadow: 0 0 10px rgba(251, 191, 36, 0.5);
}

/* ==========================================================================
   Lead Form Section
   ========================================================================== */
.contact-section {
    padding: 100px 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.detail-item {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.detail-item i {
    width: 44px;
    height: 44px;
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.1rem;
    box-shadow: var(--shadow-glow);
}

.detail-item h4 {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.15rem;
}

.detail-item p {
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
}

.form-wrapper {
    background: #0d121f;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5), var(--shadow-glow);
}

.form-title {
    font-size: 1.6rem;
    text-align: center;
    color: #fff;
    margin-bottom: 0.5rem;
}

.form-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.form-group {
    position: relative;
    margin-bottom: 1.25rem;
}

.input-icon {
    position: absolute;
    top: 50%;
    left: 16px;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    transition: var(--transition);
}

.form-group textarea ~ .input-icon {
    top: 25px;
    transform: none;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 0.85rem 1rem 0.85rem 2.75rem;
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(0, 242, 254, 0.02);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
}

.form-group input:focus ~ .input-icon,
.form-group textarea:focus ~ .input-icon {
    color: var(--color-primary);
}

.form-secure {
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 1.25rem;
}

.form-secure i {
    color: #10b981;
}

/* Spinner */
.spinner {
    display: inline-block;
}
.spinner.hidden {
    display: none;
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
footer {
    background: #060910;
    border-top: 1px solid rgba(255,255,255,0.03);
    padding-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.footer-logo p {
    color: var(--color-text-muted);
    margin-top: 1rem;
    max-width: 300px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

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

.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.footer-contact p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.footer-bottom {
    padding: 2rem 0;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast-container {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: #111827;
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5), var(--shadow-glow);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    min-width: 300px;
    animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideIn {
    0% { transform: translateX(-100%); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

.toast.success i {
    color: #10b981;
}

.toast.error i {
    color: #ef4444;
}

/* ==========================================================================
   Floating Widgets
   ========================================================================== */
.floating-actions {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.float-btn:hover {
    transform: scale(1.1);
}

.zalo-btn {
    background: #0084ff;
    border: 1px solid rgba(255,255,255,0.1);
    animation: floatPulse 2s infinite;
}

.phone-btn {
    background: #10b981;
    border: 1px solid rgba(255,255,255,0.1);
    animation: floatPulse 2s infinite 0.5s;
}

.float-btn .btn-label {
    position: absolute;
    right: 75px;
    background: rgba(10, 13, 22, 0.9);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    white-space: nowrap;
    box-shadow: var(--shadow-glow);
}

.float-btn:hover .btn-label {
    opacity: 1;
}

@keyframes floatPulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 132, 255, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(0, 132, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 132, 255, 0); }
}

.phone-btn {
    animation-name: phonePulse;
}

@keyframes phonePulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .hero-section {
        padding-top: 130px;
        padding-bottom: 60px;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .heads-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    header .navbar {
        height: 70px;
    }
    
    .nav-menu,
    .hide-tablet {
        display: none !important;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .countdown-flex {
        justify-content: center;
        text-align: center;
    }
    
    .heads-grid {
        grid-template-columns: 1fr;
    }
    
    .app-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .gifts-grid {
        grid-template-columns: 1fr;
    }
    
    .form-wrapper {
        padding: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .new-price {
        font-size: 3.25rem;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .countdown {
        gap: 0.5rem;
    }
    
    .time-block {
        min-width: 60px;
        padding: 0.3rem 0.5rem;
    }
    
    .time-block span {
        font-size: 1.25rem;
    }
    
    .new-price {
        font-size: 2.75rem;
    }
    
    .floating-actions {
        bottom: 20px;
        right: 20px;
    }
}