/* ═══════════════════════════════════════════════════════════════════
   VIETMAP SHIELD — Modernist Design System
   
   Philosophy: Beauty through restraint. Color as punctuation.
   Typography: Authoritative yet approachable.
   Motion: Smooth, measured, unhurried.
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ──────────────────────────────────────────────── */
:root {
    /* Surface */
    --surface-primary: #FAFAF8;
    --surface-secondary: #F2F1ED;
    --surface-dark: #0F1114;
    --surface-card: #FFFFFF;

    /* Text */
    --text-primary: #1A1D23;
    --text-secondary: #6B7080;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FAFAF8;

    /* Accent — Cobalt Blue: the single vivid object */
    --accent: #1B5DDB;
    --accent-light: #3B7BF7;
    --accent-subtle: rgba(27, 93, 219, 0.08);
    --accent-glow: rgba(27, 93, 219, 0.15);

    /* Chromatic punctuation moments */
    --punctuation-warm: #E8553A;
    --punctuation-gold: #D4930D;

    /* Borders & Dividers */
    --border-subtle: rgba(26, 29, 35, 0.08);
    --border-medium: rgba(26, 29, 35, 0.12);

    /* Typography Scale */
    --font-display: 'Space Grotesk', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;

    --text-xs: clamp(0.6875rem, 0.65rem + 0.15vw, 0.75rem);
    --text-sm: clamp(0.8125rem, 0.78rem + 0.15vw, 0.875rem);
    --text-base: clamp(0.9375rem, 0.9rem + 0.18vw, 1rem);
    --text-lg: clamp(1.0625rem, 1rem + 0.25vw, 1.125rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
    --text-2xl: clamp(1.75rem, 1.4rem + 1.2vw, 2.5rem);
    --text-3xl: clamp(2.25rem, 1.6rem + 2.2vw, 3.75rem);
    --text-4xl: clamp(2.75rem, 1.8rem + 3.2vw, 5rem);

    /* Spacing */
    --space-xs: clamp(0.5rem, 0.4rem + 0.3vw, 0.75rem);
    --space-sm: clamp(0.75rem, 0.6rem + 0.5vw, 1rem);
    --space-md: clamp(1rem, 0.8rem + 0.8vw, 1.5rem);
    --space-lg: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
    --space-xl: clamp(2rem, 1.2rem + 2.5vw, 4rem);
    --space-2xl: clamp(3rem, 1.5rem + 4vw, 6rem);
    --space-3xl: clamp(4rem, 2rem + 6vw, 9rem);

    /* Layout */
    --max-width: 1280px;
    --nav-height: 72px;

    /* Motion */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --duration-fast: 300ms;
    --duration-normal: 600ms;
    --duration-slow: 900ms;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.10), 0 8px 20px rgba(0,0,0,0.05);
}

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

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

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--surface-primary);
    overflow-x: hidden;
}

::selection {
    background-color: var(--accent);
    color: var(--text-inverse);
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* ─── Typography ─────────────────────────────────────────────────── */
.text-accent {
    color: var(--accent);
}

/* ─── Navigation ─────────────────────────────────────────────────── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    transition: background-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out),
                backdrop-filter var(--duration-fast) var(--ease-out);
}

.nav.is-scrolled {
    background-color: rgba(250, 250, 248, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 1px 0 var(--border-subtle);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10;
}

.nav-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.nav-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.nav-logo-brand {
    font-family: var(--font-display);
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.nav-logo-product {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 450;
    letter-spacing: 0.01em;
    color: var(--text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: var(--accent);
    transition: width var(--duration-fast) var(--ease-out);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    font-weight: 500 !important;
    color: var(--accent) !important;
    padding: 8px 20px;
    border: 1.5px solid var(--accent);
    border-radius: 100px;
    transition: background-color var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out) !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background-color: var(--accent) !important;
    color: white !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 10;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background-color: var(--text-primary);
    transition: transform var(--duration-fast) var(--ease-out),
                opacity var(--duration-fast) var(--ease-out);
}

.nav-toggle.is-active span:first-child {
    transform: translateY(3.75px) rotate(45deg);
}

.nav-toggle.is-active span:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background-color: rgba(250, 250, 248, 0.97);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.mobile-menu.is-active {
    opacity: 1;
    pointer-events: all;
}

.mobile-menu-links {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-menu-links a {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 500;
    color: var(--text-primary);
    transition: color var(--duration-fast) var(--ease-out);
}

.mobile-menu-links a:hover {
    color: var(--accent);
}

.mobile-menu-links .nav-cta {
    font-size: var(--text-lg) !important;
    display: inline-block;
    margin-top: var(--space-md);
}

/* ─── Hero Section ───────────────────────────────────────────────── */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(var(--nav-height) + var(--space-xl)) var(--space-lg) var(--space-xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0.6;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-overline {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-md);
}

.hero-headline {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.hero-line {
    display: block;
}

.hero-line--accent {
    color: var(--accent);
}

.hero-description {
    font-size: var(--text-lg);
    font-weight: 350;
    line-height: 1.75;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: var(--space-xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-device {
    position: relative;
    max-width: 440px;
    width: 100%;
}

.hero-device-img {
    width: 100%;
    filter: drop-shadow(0 30px 60px rgba(0,0,0,0.15));
    transition: transform var(--duration-slow) var(--ease-out);
}

.hero-device:hover .hero-device-img {
    transform: translateY(-8px) scale(1.01);
}

.hero-badge {
    position: absolute;
    bottom: 8%;
    left: -10%;
    background: var(--surface-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 16px 22px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    line-height: 1.2;
}

.hero-badge-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--punctuation-warm);
    display: block;
}

.hero-badge-unit {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.hero-badge-label {
    font-size: var(--text-xs);
    font-weight: 400;
    color: var(--text-tertiary);
    display: block;
    margin-top: 4px;
}

/* Hero Scroll Indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.hero-scroll-text {
    font-size: var(--text-xs);
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

.hero-scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--text-tertiary), transparent);
    animation: scrollPulse 2.5s var(--ease-in-out) infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ─── Buttons ────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 14px 32px;
    border-radius: 100px;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    border: none;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 2px 12px rgba(27, 93, 219, 0.25);
}

.btn--primary:hover {
    background-color: var(--accent-light);
    box-shadow: 0 4px 20px rgba(27, 93, 219, 0.35);
    transform: translateY(-1px);
}

.btn--ghost {
    background-color: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-medium);
}

.btn--ghost:hover {
    border-color: var(--text-primary);
    background-color: rgba(26, 29, 35, 0.03);
}

.btn--large {
    padding: 18px 40px;
    font-size: var(--text-base);
}

.btn-icon {
    width: 18px;
    height: 18px;
}

/* ─── Section Shared ─────────────────────────────────────────────── */
.section {
    padding: var(--space-3xl) var(--space-lg);
    position: relative;
}

.section-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-number {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--accent);
    display: block;
    margin-bottom: 4px;
}

.section-label {
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

/* ─── Philosophy Section ─────────────────────────────────────────── */
.section--philosophy {
    background-color: var(--surface-primary);
    border-top: 1px solid var(--border-subtle);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.philosophy-headline {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.philosophy-body {
    font-size: var(--text-lg);
    font-weight: 350;
    line-height: 1.85;
    color: var(--text-secondary);
    max-width: 640px;
    margin-bottom: var(--space-xl);
}

.philosophy-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-value {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

.stat-unit {
    font-size: 0.6em;
    font-weight: 400;
    color: var(--accent);
}

.stat-label {
    font-size: var(--text-xs);
    font-weight: 400;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

/* ─── Capabilities Section ───────────────────────────────────────── */
.section--capabilities {
    background-color: var(--surface-secondary);
}

.capabilities-header {
    margin-bottom: var(--space-3xl);
}

.capabilities-headline {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-top: var(--space-md);
}

/* Feature Blocks */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--border-subtle);
}

.feature-block:last-child {
    padding-bottom: 0;
}

.feature-block--reverse .feature-block-content {
    order: 2;
}

.feature-block--reverse .feature-block-visual {
    order: 1;
}

.feature-index {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
}

.feature-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.feature-desc {
    font-size: var(--text-base);
    font-weight: 350;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    max-width: 480px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feature-list li {
    font-size: var(--text-sm);
    font-weight: 400;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent);
    opacity: 0.6;
}

.feature-block-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-img {
    max-width: 100%;
    border-radius: 4px;
    transition: transform var(--duration-slow) var(--ease-out);
}

.feature-block-visual:hover .feature-img {
    transform: scale(1.02);
}

/* ─── Specs Section ──────────────────────────────────────────────── */
.section--specs {
    background-color: var(--surface-dark);
    color: var(--text-inverse);
}

.specs-header {
    margin-bottom: var(--space-2xl);
}

.section--specs .section-number {
    color: var(--accent-light);
}

.section--specs .section-label {
    color: rgba(250, 250, 248, 0.4);
}

.specs-headline {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-inverse);
    margin-top: var(--space-md);
}

.section--specs .text-accent {
    color: var(--accent-light);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background-color: rgba(250, 250, 248, 0.06);
    border-radius: 16px;
    overflow: hidden;
}

.spec-card {
    background-color: rgba(250, 250, 248, 0.03);
    padding: var(--space-xl);
    transition: background-color var(--duration-fast) var(--ease-out);
}

.spec-card:hover {
    background-color: rgba(250, 250, 248, 0.06);
}

.spec-card-icon {
    width: 40px;
    height: 40px;
    color: var(--accent-light);
    margin-bottom: var(--space-md);
}

.spec-card-icon svg {
    width: 100%;
    height: 100%;
}

.spec-card-title {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(250, 250, 248, 0.4);
    margin-bottom: var(--space-sm);
}

.spec-card-value {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-inverse);
    line-height: 1.3;
    margin-bottom: 6px;
}

.spec-card-detail {
    font-size: var(--text-sm);
    font-weight: 350;
    color: rgba(250, 250, 248, 0.5);
    line-height: 1.6;
}

/* ─── Ecosystem Section ──────────────────────────────────────────── */
.section--ecosystem {
    background-color: var(--surface-primary);
    border-top: 1px solid var(--border-subtle);
}

.ecosystem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.ecosystem-headline {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-top: var(--space-md);
    margin-bottom: var(--space-lg);
}

.ecosystem-body {
    font-size: var(--text-base);
    font-weight: 350;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 520px;
}

.ecosystem-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.eco-feature {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: var(--text-sm);
    font-weight: 400;
    color: var(--text-secondary);
}

.eco-feature-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent);
    flex-shrink: 0;
    opacity: 0.7;
}

.ecosystem-visual {
    display: flex;
    justify-content: center;
}

.ecosystem-img {
    max-width: 100%;
    border-radius: 4px;
    filter: drop-shadow(0 20px 50px rgba(0,0,0,0.1));
    transition: transform var(--duration-slow) var(--ease-out);
}

.ecosystem-visual:hover .ecosystem-img {
    transform: translateY(-6px) scale(1.01);
}

/* ─── Platforms Section ──────────────────────────────────────────── */
.section--platforms {
    background-color: var(--surface-primary);
    border-top: 1px solid var(--border-subtle);
}

.platforms-header {
    margin-bottom: var(--space-3xl);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.platforms-headline {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-top: var(--space-md);
    margin-bottom: var(--space-lg);
}

.platforms-subtitle {
    font-size: var(--text-lg);
    font-weight: 350;
    line-height: 1.8;
    color: var(--text-secondary);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    text-align: center;
}

.platform-card {
    background-color: var(--surface-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: transform var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.platform-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.platform-card-badge {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--surface-secondary);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    padding: 6px 12px;
    border-bottom-left-radius: 12px;
}

.platform-qr {
    width: 140px;
    height: 140px;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    padding: 10px;
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    background: var(--surface-card);
}

.qr-code {
    width: 100%;
    height: 100%;
    display: block;
}

.platform-card-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.platform-card-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
    flex-grow: 1;
}

.platform-url {
    display: block;
    font-family: var(--font-display);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-top: 12px;
    letter-spacing: 0.05em;
}

.store-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: var(--text-primary);
    color: white;
    padding: 10px 24px;
    border-radius: 100px;
    text-decoration: none;
    transition: background-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
    width: 100%;
    justify-content: center;
}

.store-btn:hover {
    background-color: var(--surface-dark);
    transform: translateY(-2px);
}

.store-btn-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.store-btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.store-btn-small {
    font-size: 0.65rem;
    font-weight: 400;
    opacity: 0.8;
}

.store-btn-large {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.platform-btn {
    width: 100%;
    justify-content: center;
}

/* ─── CTA Section ────────────────────────────────────────────────── */
.section--cta {
    background-color: var(--surface-secondary);
    text-align: center;
    border-top: 1px solid var(--border-subtle);
}

.cta-content {
    max-width: 640px;
    margin: 0 auto;
}

.cta-headline {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-top: var(--space-md);
    margin-bottom: var(--space-lg);
}

.cta-body {
    font-size: var(--text-lg);
    font-weight: 350;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.cta-trust {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--text-sm);
    font-weight: 400;
    color: var(--text-secondary);
}

.trust-icon {
    width: 20px;
    height: 20px;
    color: var(--accent);
}

/* ─── Footer ─────────────────────────────────────────────────────── */
.footer {
    padding: var(--space-2xl) var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--border-subtle);
    background-color: var(--surface-primary);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand-block {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 300px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.footer-brand-text {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--text-primary);
}

.footer-contact-phone {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--text-primary);
    margin-top: var(--space-sm);
}

.footer-socials {
    display: flex;
    gap: 16px;
    margin-top: var(--space-xs);
}

.social-icon {
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
}

.social-icon:hover {
    color: var(--accent);
}

.footer-address-block {
    display: flex;
    gap: var(--space-2xl);
}

.footer-address {
    max-width: 280px;
}

.footer-heading {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
}

.footer-address p {
    font-size: var(--text-sm);
    line-height: 1.6;
    color: var(--text-secondary);
}

.footer-bottom {
    display: flex;
    justify-content: flex-start;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
}

.footer-copy {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* ─── Reveal Animation ───────────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children inside same parent */
.reveal:nth-child(2) { transition-delay: 80ms; }
.reveal:nth-child(3) { transition-delay: 160ms; }
.reveal:nth-child(4) { transition-delay: 240ms; }
.reveal:nth-child(5) { transition-delay: 320ms; }

/* ─── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .philosophy-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .philosophy-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .feature-block {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .feature-block--reverse .feature-block-content {
        order: 1;
    }

    .feature-block--reverse .feature-block-visual {
        order: 2;
    }

    .feature-img {
        max-width: 80%;
        margin: 0 auto;
    }

    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ecosystem-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .ecosystem-visual {
        order: -1;
    }

    .ecosystem-img {
        max-width: 80%;
        margin: 0 auto;
    }

    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-visual {
        order: -1;
    }

    .hero-device {
        max-width: 300px;
    }

    .hero-badge {
        bottom: 4%;
        left: 2%;
        padding: 12px 16px;
    }

    .hero-badge-number {
        font-size: 1.5rem;
    }

    .hero-scroll-indicator {
        display: none;
    }

    .philosophy-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }

    .feature-img {
        max-width: 100%;
    }

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

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

    .cta-actions {
        flex-direction: column;
    }

    .cta-trust {
        flex-direction: column;
        align-items: center;
        gap: var(--space-md);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .footer-address-block {
        flex-direction: column;
        gap: var(--space-lg);
    }

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

    .ecosystem-img {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .philosophy-stats {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .stat {
        flex-direction: row;
        align-items: baseline;
        gap: var(--space-sm);
    }
}

/* ─── Reduced Motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero-scroll-line {
        animation: none;
    }

    html {
        scroll-behavior: auto;
    }
}