/* ==========================================
   Creative Vision — Minimalist Modern Design
   ========================================== */

/* CSS Variables */
:root {
    /* Colors - Monochromatic with accent */
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-dark: #0a0a0a;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b7280;
    --color-text-light: #9ca3af;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    --color-accent: #1a1a1a;
    --color-accent-hover: #333333;
    --color-white: #ffffff;

    /* Typography */
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
}

/* 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;
}

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

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

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

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

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-10);
    }
}

/* ==========================================
   Navigation
   ========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base), background var(--transition-base);
}

.nav.scrolled {
    border-bottom-color: var(--color-border-light);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (min-width: 768px) {
    .nav-container {
        padding: 0 var(--space-10);
    }
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--color-accent);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.nav-links {
    display: none;
    align-items: center;
    gap: var(--space-8);
}

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

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: var(--space-2) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

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

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

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.lang-toggle:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.lang-current {
    color: var(--color-text);
}

.lang-divider {
    color: var(--color-text-light);
}

.lang-target {
    color: var(--color-text-light);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

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

/* Mobile Menu */
.mobile-menu {
    display: none;
    flex-direction: column;
    padding: var(--space-6);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border-light);
}

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

.mobile-link {
    padding: var(--space-4) 0;
    font-size: var(--font-size-lg);
    font-weight: 500;
    border-bottom: 1px solid var(--color-border-light);
}

.mobile-lang {
    margin-top: var(--space-4);
    align-self: flex-start;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-24) var(--space-6);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 0, 0, 0.02) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 0, 0, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(0, 0, 0, 0.01) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-subtitle {
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.4s;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

.hero-accent {
    display: block;
    font-weight: 300;
    color: var(--color-text-secondary);
    font-size: 0.6em;
    margin-top: var(--space-2);
    letter-spacing: 0.08em;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--space-10);
    line-height: 1.7;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.8s;
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.2s;
}

.hero-scroll span {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-text-light), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-8);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    border: 1.5px solid var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-text);
    background: var(--color-text);
    color: var(--color-white);
}

.btn-full {
    width: 100%;
}

/* ==========================================
   Section Styles
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-tag {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    padding: var(--space-1) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

.section-desc {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 520px;
    margin: 0 auto;
}

/* ==========================================
   Services Section
   ========================================== */
.services {
    padding: var(--space-32) 0;
    background: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 640px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.service-card {
    background: var(--color-bg);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
    border-color: var(--color-border);
}

.service-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-5);
    color: var(--color-text);
}

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

.service-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.service-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ==========================================
   Portfolio Section
   ========================================== */
.portfolio {
    padding: var(--space-32) 0;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 640px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .portfolio-large {
        grid-column: span 2;
        grid-row: span 2;
    }
}

.portfolio-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.portfolio-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.portfolio-large {
    aspect-ratio: 4/3;
}

@media (min-width: 1024px) {
    .portfolio-large {
        aspect-ratio: auto;
    }
}

.portfolio-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    color: var(--color-text-light);
    transition: all var(--transition-base);
}

.portfolio-item:hover .portfolio-placeholder {
    color: var(--color-text-secondary);
}

.portfolio-placeholder svg {
    width: 48px;
    height: 48px;
}

.portfolio-placeholder span {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ==========================================
   About Section
   ========================================== */
.about {
    padding: var(--space-32) 0;
    background: var(--color-bg-alt);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-16);
    align-items: center;
}

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

.about-content .section-tag {
    margin-bottom: var(--space-4);
}

.about-content .section-title {
    text-align: left;
    margin-bottom: var(--space-6);
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

.about-stats {
    display: flex;
    gap: var(--space-10);
    margin-top: var(--space-10);
    padding-top: var(--space-10);
    border-top: 1px solid var(--color-border);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

.about-visual {
    position: relative;
}

.about-image {
    position: relative;
    aspect-ratio: 4/5;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.about-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    color: var(--color-text-light);
}

.about-image-placeholder svg {
    width: 80px;
    height: 80px;
}

.about-accent {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 100%;
    height: 100%;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    z-index: -1;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    padding: var(--space-32) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-16);
}

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

.contact-info .section-tag {
    margin-bottom: var(--space-4);
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: var(--space-4);
}

.contact-desc {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-10);
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.contact-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    color: var(--color-text);
    flex-shrink: 0;
}

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

.contact-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    margin-bottom: var(--space-1);
}

.contact-value {
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-bg-alt);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
}

@media (min-width: 768px) {
    .contact-form-wrapper {
        padding: var(--space-10);
    }
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-input {
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-text);
}

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-success {
    display: none;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    border-radius: var(--radius-md);
    color: #065f46;
    font-size: var(--font-size-sm);
}

.form-success.show {
    display: flex;
}

.form-success svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    border-top: 1px solid var(--color-border-light);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.footer-brand .logo-icon {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-xs);
}

.footer-company {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    gap: var(--space-6);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

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

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.social-link svg {
    width: 16px;
    height: 16px;
}

.footer-bottom {
    margin-top: var(--space-10);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border-light);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

/* ==========================================
   Animations
   ========================================== */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==========================================
   Utility
   ========================================== */
[lang="en"] .hero-subtitle {
    letter-spacing: 0.1em;
}

/* Smooth language transition */
[data-i18n], [data-i18n-meta] {
    transition: opacity 0.2s ease;
}

.lang-fading [data-i18n],
.lang-fading [data-i18n-meta] {
    opacity: 0;
}