/* ==========================================
   CSS CUSTOM PROPERTIES & DESIGN SYSTEM
   ========================================== */

:root {
    /* Color Palette - Premium Gradients */
    --color-primary: hsl(260, 85%, 65%);
    --color-secondary: hsl(220, 90%, 60%);
    --color-accent: hsl(320, 85%, 65%);

    --gradient-primary: linear-gradient(135deg,
            hsl(260, 85%, 65%) 0%,
            hsl(220, 90%, 60%) 50%,
            hsl(320, 85%, 65%) 100%);

    --gradient-card: linear-gradient(135deg,
            hsla(260, 85%, 65%, 0.1) 0%,
            hsla(220, 90%, 60%, 0.1) 100%);

    /* Neutral Colors */
    --color-bg-dark: hsl(240, 15%, 8%);
    --color-bg-card: hsla(240, 15%, 12%, 0.6);
    --color-text-primary: hsl(0, 0%, 98%);
    --color-text-secondary: hsl(0, 0%, 75%);
    --color-border: hsla(0, 0%, 100%, 0.1);

    /* Spacing System */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;

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

    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 3rem;
    --font-size-3xl: 4rem;

    /* Effects */
    --shadow-sm: 0 2px 8px hsla(0, 0%, 0%, 0.1);
    --shadow-md: 0 4px 16px hsla(0, 0%, 0%, 0.2);
    --shadow-lg: 0 8px 32px hsla(0, 0%, 0%, 0.3);
    --shadow-glow: 0 0 40px hsla(260, 85%, 65%, 0.3);

    --blur-sm: 10px;
    --blur-md: 20px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

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

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

body {
    font-family: var(--font-primary);
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, hsla(260, 85%, 65%, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, hsla(220, 90%, 60%, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, hsla(320, 85%, 65%, 0.1) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundShift 20s ease infinite;
}

@keyframes backgroundShift {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-3xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

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

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

/* ==========================================
   NAVIGATION
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    backdrop-filter: blur(var(--blur-md));
    background: hsla(240, 15%, 12%, 0.8);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-primary);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

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

.lang-switch {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    cursor: pointer;
    font-weight: 600;
    font-size: var(--font-size-sm);
    font-family: var(--font-primary);
    transition: all var(--transition-normal);
    backdrop-filter: blur(var(--blur-md));
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: calc(var(--spacing-md) + 24px);
    min-width: 140px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-sm) center;
    box-shadow: var(--shadow-sm);
}

.lang-switch:hover {
    background: linear-gradient(135deg,
            hsla(260, 85%, 65%, 0.2) 0%,
            hsla(220, 90%, 60%, 0.2) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: hsla(260, 85%, 65%, 0.5);
}

.lang-switch:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px hsla(260, 85%, 65%, 0.2), var(--shadow-md);
    transform: translateY(-1px);
}

.lang-switch:active {
    transform: translateY(0);
}

.lang-switch option {
    background: hsl(240, 15%, 15%);
    color: var(--color-text-primary);
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.lang-switch option:hover {
    background: hsl(240, 15%, 20%);
}

.lang-switch option:checked {
    background: var(--gradient-primary);
    font-weight: 700;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-xs);
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    z-index: 1;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero p {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s ease 0.4s backwards;
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 1s ease 0.6s backwards;
}

.cta-button:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    color: white;
}

/* ==========================================
   SECTIONS
   ========================================== */

.section {
    padding: var(--spacing-2xl) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-slow);
}

.section-title.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   SERVICES GRID
   ========================================== */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.service-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(var(--blur-md));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: hsla(260, 85%, 65%, 0.5);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    transition: var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.service-card p {
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */

.contact {
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid var(--color-border);
    backdrop-filter: blur(var(--blur-md));
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-md);
    transition: var(--transition-fast);
}

.contact-item:hover {
    transform: translateY(-2px);
    color: var(--color-primary);
}

.contact-icon {
    font-size: var(--font-size-xl);
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-2xl);
}

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

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        max-width: 300px;
        background: hsla(240, 15%, 12%, 0.98);
        backdrop-filter: blur(var(--blur-md));
        flex-direction: column;
        padding: var(--spacing-2xl) var(--spacing-lg);
        gap: var(--spacing-md);
        transition: var(--transition-normal);
        border-left: 1px solid var(--color-border);
    }

    .nav-links.active {
        right: 0;
    }

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

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

    .contact-info {
        flex-direction: column;
        align-items: center;
    }

    h1 {
        font-size: var(--font-size-2xl);
    }

    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.hidden {
    display: none;
}