/* ==========================================================================
   ProfIT Translation Center - Main Styles
   Mobile-first, optimized for performance
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables / Design Tokens
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-primary: #8B5CF6;
    --color-primary-dark: #7C3AED;
    --color-primary-light: #A78BFA;
    --color-accent: #EC4899;
    --color-accent-dark: #DB2777;
    --color-accent-light: #F472B6;
    
    --color-bg-dark: #0F172A;
    --color-bg-card: #1E293B;
    --color-bg-glass: rgba(15, 23, 42, 0.5);
    
    --color-text: #F8FAFC;
    --color-text-muted: #94A3B8;
    --color-text-dark: #64748B;
    
    --color-border: rgba(148, 163, 184, 0.2);
    --color-border-light: rgba(248, 250, 252, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    --gradient-glass: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
    
    /* Glass Effect */
    --glass-blur: 12px;
    --glass-bg: rgba(15, 23, 42, 0.5);
    --glass-border: rgba(248, 250, 252, 0.1);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, 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;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Layout */
    --header-height: 80px;
    --container-max: 1200px;
    --container-padding: 1rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

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

/* Background gradient */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
        var(--color-bg-dark);
    z-index: -1;
    pointer-events: none;
}

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

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

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

ul,
ol {
    list-style: none;
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: var(--color-primary);
    color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Header - Glassmorphism
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    padding: var(--space-sm) 0;
}

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

/* Logo */
.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.header__logo-icon {
    color: var(--color-primary);
    width: 40px;
    height: 40px;
}

.header__logo-text {
    display: none;
}

.header__logo-title {
    display: block;
    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;
}

.header__logo-subtitle {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Tagline */
.header__tagline {
    display: none;
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-style: italic;
    padding: var(--space-xs) var(--container-padding);
    border-top: 1px solid var(--glass-border);
    margin-top: var(--space-sm);
}

/* Navigation */
.header__nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-dark);
    padding: var(--space-xl);
    z-index: 999;
}

.header__nav.active {
    display: block;
}

.header__menu {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.header__link {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

.header__link:hover,
.header__link.active {
    color: var(--color-text);
}

.header__link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* Language Switcher */
.header__lang {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-shrink: 0;
}

.header__lang-btn {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.header__lang-btn:hover {
    color: var(--color-text);
}

.header__lang-btn.active {
    color: var(--color-accent);
    background: rgba(236, 72, 153, 0.1);
}

.header__lang-divider {
    color: var(--color-text-dark);
}

/* Burger Menu */
.header__burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    z-index: 1001;
}

.header__burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    transform-origin: center;
}

.header__burger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__burger.active span:nth-child(2) {
    opacity: 0;
}

.header__burger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Main & Sections
   -------------------------------------------------------------------------- */
.main {
    padding-top: var(--header-height);
}

.section {
    min-height: 100vh;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    position: relative;
    overflow: hidden;
}

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

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.section--hero {
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(139, 92, 246, 0.05) 100%);
}

.section--hero .section__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.section__title--hero {
    font-size: var(--font-size-3xl);
    line-height: 1.2;
    margin-bottom: var(--space-lg);
}

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

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

/* Floating Shapes */
.section__decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.3;
    filter: blur(60px);
    animation: float 20s infinite ease-in-out;
}

.shape--1 {
    width: 300px;
    height: 300px;
    background: var(--color-primary);
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.shape--2 {
    width: 200px;
    height: 200px;
    background: var(--color-accent);
    top: 60%;
    right: -5%;
    animation-delay: -7s;
}

.shape--3 {
    width: 150px;
    height: 150px;
    background: var(--color-primary-light);
    bottom: 10%;
    left: 20%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }
    75% {
        transform: translate(-30px, -20px) scale(1.05);
    }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn--primary {
    background: var(--gradient-primary);
    color: var(--color-text);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 60px rgba(139, 92, 246, 0.4);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--full {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.section--services {
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.05) 0%, transparent 50%, rgba(236, 72, 153, 0.03) 100%);
}

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

.service-card {
    background: var(--gradient-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(139, 92, 246, 0.15);
}

.service-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    color: var(--color-text);
}

.service-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.service-card__desc {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Why Us Section
   -------------------------------------------------------------------------- */
.section--why-us {
    background: linear-gradient(180deg, rgba(236, 72, 153, 0.03) 0%, transparent 100%);
}

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

.feature {
    text-align: center;
    padding: var(--space-lg);
}

.feature__number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.feature__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.feature__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   How To Section
   -------------------------------------------------------------------------- */
.section--how-to {
    background: linear-gradient(180deg, transparent 0%, rgba(139, 92, 246, 0.03) 100%);
}

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

.step {
    text-align: center;
    padding: var(--space-lg);
    background: var(--gradient-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 300px;
}

.step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    border-radius: 50%;
    margin-bottom: var(--space-md);
}

.step__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.step__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.step__connector {
    width: 2px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   Contacts Section
   -------------------------------------------------------------------------- */
.section--contacts {
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.03) 0%, transparent 100%);
}

.contacts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}

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

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

.contact-item__icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--gradient-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
}

.contact-item__title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.contact-item__value {
    display: block;
    font-size: var(--font-size-base);
    color: var(--color-text);
    transition: color var(--transition-fast);
}

a.contact-item__value:hover {
    color: var(--color-primary);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--gradient-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.form-input {
    width: 100%;
    padding: var(--space-md);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

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

.form-input--textarea {
    resize: vertical;
    min-height: 120px;
}

/* --------------------------------------------------------------------------
   FAQ Section
   -------------------------------------------------------------------------- */
.section--faq {
    background: linear-gradient(180deg, transparent 0%, rgba(236, 72, 153, 0.03) 100%);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--gradient-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.faq-item:hover,
.faq-item[open] {
    border-color: var(--color-primary);
}

.faq-item__question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    list-style: none;
}

.faq-item__question::-webkit-details-marker {
    display: none;
}

.faq-item__icon {
    flex-shrink: 0;
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

.faq-item[open] .faq-item__icon {
    transform: rotate(180deg);
}

.faq-item__answer {
    padding: 0 var(--space-lg) var(--space-lg);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0 var(--space-lg);
    scroll-snap-align: end;
}

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

.footer__top {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.footer__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: italic;
}

.footer__nav {
    display: flex;
    gap: var(--space-lg);
}

.footer__nav a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer__bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.footer__copy {
    font-size: var(--font-size-sm);
    color: var(--color-text-dark);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.slide-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* --------------------------------------------------------------------------
   Tablet Breakpoint (768px+)
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
    :root {
        --header-height: 90px;
        --container-padding: 2rem;
    }
    
    .header__logo-text {
        display: block;
    }
    
    .header__tagline {
        display: block;
    }
    
    .section__title {
        font-size: var(--font-size-4xl);
    }
    
    .section__title--hero {
        font-size: var(--font-size-4xl);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .steps {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .step {
        max-width: 220px;
    }
    
    .step__connector {
        width: 40px;
        height: 2px;
    }
    
    .contacts-grid {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
}

/* --------------------------------------------------------------------------
   Desktop Breakpoint (1024px+)
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
    :root {
        --header-height: 100px;
    }
    
    /* Header Desktop */
    .header__nav {
        display: block;
        position: static;
        background: none;
        padding: 0;
    }
    
    .header__menu {
        flex-direction: row;
        gap: var(--space-xl);
    }
    
    .header__link {
        font-size: var(--font-size-sm);
    }
    
    .header__burger {
        display: none;
    }
    
    .header__tagline {
        position: absolute;
        bottom: -24px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--glass-bg);
        backdrop-filter: blur(var(--glass-blur));
        padding: var(--space-xs) var(--space-md);
        border-radius: var(--radius-full);
        border: 1px solid var(--glass-border);
        margin: 0;
        white-space: nowrap;
    }
    
    .section__title--hero {
        font-size: var(--font-size-5xl);
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .step {
        max-width: 240px;
    }
}

/* --------------------------------------------------------------------------
   Reduced Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .shape {
        animation: none;
    }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
    .header,
    .section__decoration,
    .btn,
    .header__burger {
        display: none !important;
    }
    
    .section {
        min-height: auto;
        page-break-inside: avoid;
    }
    
    body {
        background: white;
        color: black;
    }
}