/* ==========================================================================
   Oxin Website - Styles
   Inspired by hellomonday.com
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-black: #0a0a0a;
    --color-white: #ffffff;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;

    /* Accent */
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Font Sizes - Fluid */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
    --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
    --text-4xl: clamp(2.5rem, 1.75rem + 3.75vw, 4rem);
    --text-5xl: clamp(3rem, 2rem + 5vw, 5.5rem);
    --text-6xl: clamp(3.5rem, 2.25rem + 6.25vw, 7rem);

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

    /* Layout */
    --container-max: 1400px;
    --container-padding: clamp(1.5rem, 5vw, 4rem);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-black);
    background: var(--color-white);
}

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

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

ul {
    list-style: none;
}

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

address {
    font-style: normal;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--space-32) 0;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-6) 0;
    background: transparent;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav.scrolled {
    background: var(--color-white);
    box-shadow: 0 1px 0 var(--color-gray-200);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

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

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-2);
    z-index: 101;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-black);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle.active span:first-child {
    transform: translateY(4px) rotate(45deg);
}

.menu-toggle.active span:last-child {
    transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-8);
        background: var(--color-white);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-base), visibility var(--transition-base);
    }

    .nav-links.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        font-size: var(--text-2xl);
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 120px;
    position: relative;
}

.hero-title {
    font-size: var(--text-6xl);
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-8);
}

.hero-title .line {
    display: block;
    overflow: hidden;
}

.hero-title .line {
    opacity: 0;
    transform: translateY(100%);
    animation: revealUp 1s var(--ease-out-expo) forwards;
}

.hero-title .line:nth-child(1) { animation-delay: 0.1s; }
.hero-title .line:nth-child(2) { animation-delay: 0.2s; }
.hero-title .line:nth-child(3) { animation-delay: 0.3s; }

@keyframes revealUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    max-width: 500px;
    margin-bottom: var(--space-8);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 2px;
    height: 60px;
    background: var(--color-gray-300);
    position: relative;
    overflow: hidden;
}

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

@keyframes scrollDown {
    0% { transform: translateY(-100%); }
    50% { transform: translateY(0); }
    100% { transform: translateY(100%); }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    background: var(--color-black);
    color: var(--color-white);
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.02em;
    overflow: hidden;
    transition: color var(--transition-base);
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-accent);
    transform: translateY(100%);
    transition: transform 0.4s var(--ease-out-expo);
}

.btn:hover::before {
    transform: translateY(0);
}

.btn span {
    position: relative;
    z-index: 1;
}

.btn-large {
    padding: var(--space-6) var(--space-12);
    font-size: var(--text-base);
}

/* --------------------------------------------------------------------------
   Link Hover Effect
   -------------------------------------------------------------------------- */
.link-hover {
    position: relative;
    display: inline-block;
}

.link-hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-base);
}

.link-hover:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* --------------------------------------------------------------------------
   Section Title
   -------------------------------------------------------------------------- */
.section-title {
    font-size: var(--text-4xl);
    font-weight: 900;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-16);
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.services {
    background: var(--color-gray-100);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.service-card {
    padding: var(--space-8);
    background: var(--color-white);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.service-number {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.service-title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.service-description {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Work/Portfolio Section
   -------------------------------------------------------------------------- */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(12, 1fr);
    }

    .project-card:nth-child(odd) {
        grid-column: span 7;
    }

    .project-card:nth-child(even) {
        grid-column: span 5;
    }

    .project-card-single {
        grid-column: 3 / 11;
    }
}

.project-card {
    cursor: pointer;
}

.project-image {
    overflow: hidden;
    margin-bottom: var(--space-6);
}

.project-image-zoom-out {
    padding: var(--space-6);
    background: var(--color-gray-100);
}

.project-image-zoom-out img {
    transform: scale(1);
    border-radius: 4px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.project-image svg,
.project-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    transition: transform 0.8s var(--ease-out-expo);
}

.project-card:hover .project-image svg,
.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-category {
    display: block;
    font-size: var(--text-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-2);
}

.project-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.project-description {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    background: var(--color-gray-100);
}

.about-content {
    max-width: 700px;
    margin-bottom: var(--space-16);
}

.about-text {
    font-size: var(--text-lg);
    color: var(--color-gray-700);
    margin-bottom: var(--space-6);
}

.about-text:last-of-type {
    margin-bottom: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat {
    text-align: center;
    padding: var(--space-8);
    background: var(--color-white);
}

.stat-number {
    display: block;
    font-size: var(--text-5xl);
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--color-black);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* --------------------------------------------------------------------------
   Clients Section
   -------------------------------------------------------------------------- */
.clients {
    padding: var(--space-24) 0;
    text-align: center;
}

.clients-title {
    font-size: var(--text-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-8);
}

.clients-list {
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--color-black);
    letter-spacing: 0.02em;
    line-height: 1.8;
}

@media (min-width: 768px) {
    .clients-list {
        font-size: var(--text-2xl);
    }
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    margin-top: calc(var(--space-16) * -1);
    margin-bottom: var(--space-16);
}

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

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

.contact-item {
    margin-bottom: var(--space-8);
}

.contact-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.contact-link {
    font-size: var(--text-xl);
    font-weight: 500;
}

.contact-address {
    font-size: var(--text-base);
    line-height: 1.8;
    color: var(--color-gray-700);
}

.contact-cta {
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (min-width: 768px) {
    .contact-cta {
        justify-content: flex-end;
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-12) 0;
    background: var(--color-black);
    color: var(--color-white);
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

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

.footer-logo {
    font-size: var(--text-xl);
    font-weight: 700;
    display: block;
    margin-bottom: var(--space-4);
}

.footer-legal {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    line-height: 1.8;
}

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

.footer-link {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}