/* ============================================
   Sino Sales Copy — Styles
   ============================================ */

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

:root {
    --color-bg: #0a0a0f;
    --color-surface: #12121a;
    --color-card: #1a1a2e;
    --color-border: #2a2a3e;
    --color-text: #e8e8f0;
    --color-text-muted: #8888a0;
    --color-accent: #6c5ce7;
    --color-accent-light: #a29bfe;
    --color-accent-glow: rgba(108, 92, 231, 0.15);
    --color-green: #00d2a0;
    --color-green-glow: rgba(0, 210, 160, 0.1);
    --gradient-primary: linear-gradient(135deg, #6c5ce7, #a29bfe);
    --gradient-hero: linear-gradient(135deg, #6c5ce7 0%, #00d2a0 100%);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1200px;
    --nav-height: 72px;
    --radius: 12px;
    --radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.25rem;
}

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

a {
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-accent-light);
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo:hover {
    opacity: 0.9;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

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

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-accent-light);
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.7;
    margin: 24px 0 36px;
    max-width: 520px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-light);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.05rem;
}

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

.globe-ring {
    position: relative;
    width: 320px;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: 50%;
    animation: spin 20s linear infinite;
}

.ring-2 {
    width: 80%;
    height: 80%;
    border-color: rgba(0, 210, 160, 0.15);
    animation-direction: reverse;
    animation-duration: 15s;
}

.ring-3 {
    width: 60%;
    height: 60%;
    border-color: rgba(162, 155, 254, 0.1);
    animation-duration: 25s;
}

.center-text {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.1;
    text-align: center;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.1em;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
   Sections
   ============================================ */

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 16px auto 0;
}

/* ============================================
   About Section
   ============================================ */

.about-section {
    background: var(--color-surface);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all 0.3s ease;
}

.about-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(108, 92, 231, 0.1);
}

.about-icon {
    width: 48px;
    height: 48px;
    background: rgba(108, 92, 231, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.about-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent-light);
}

.about-card h3 {
    margin-bottom: 12px;
}

.about-card p {
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================
   Services Section
   ============================================ */

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(108, 92, 231, 0.1);
}

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

.service-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: rgba(108, 92, 231, 0.15);
    margin-bottom: 16px;
    line-height: 1;
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.9rem;
    line-height: 1.7;
}

.service-card-partner {
    border-color: rgba(0, 210, 160, 0.2);
    background: linear-gradient(135deg, rgba(0, 210, 160, 0.05), transparent);
}

.service-card-partner::before {
    background: linear-gradient(135deg, #00d2a0, #6c5ce7);
}

.service-card-partner .service-number {
    color: rgba(0, 210, 160, 0.2);
}

/* ============================================
   Why Us Section
   ============================================ */

.why-section {
    background: var(--color-surface);
}

.why-grid {
    display: grid;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.why-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.why-item:hover {
    border-color: var(--color-accent);
    transform: translateX(4px);
}

.why-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: rgba(108, 92, 231, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.why-icon svg {
    width: 22px;
    height: 22px;
    color: var(--color-accent-light);
}

.why-item h3 {
    margin-bottom: 6px;
    font-size: 1.1rem;
}

.why-item p {
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ============================================
   Contact Section
   ============================================ */

.contact-section {
    position: relative;
}

.contact-section::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.contact-card {
    max-width: 640px;
    margin: 0 auto;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 48px;
    position: relative;
    z-index: 1;
}

.contact-info {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
}

.contact-person {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-avatar-img {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-accent);
    flex-shrink: 0;
}

.contact-person h3 {
    font-size: 1.2rem;
}

.contact-title {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-accent-light);
    transition: all 0.2s;
}

.contact-email svg {
    width: 20px;
    height: 20px;
}

.contact-email:hover {
    color: var(--color-green);
}

.contact-cta p {
    margin-bottom: 24px;
    font-size: 1rem;
    line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding-top: 60px;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    padding-bottom: 40px;
}

.footer-brand .logo {
    font-size: 1.3rem;
    display: inline-block;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    max-width: 320px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.footer-col h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 10px;
}

.footer-col a:hover {
    color: var(--color-accent-light);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
}

.footer-bottom p {
    font-size: 0.85rem;
    text-align: center;
}

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

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-cta {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--color-border);
    }

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

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

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

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

    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }

    .contact-card {
        padding: 32px 24px;
    }

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}