/* ================================================
   İstechLabs - Corporate Website Styles
   Theme: Dark/Light with Black-Blue-Purple Palette
   ================================================ */

/* CSS Variables - Dark Theme (Default) */
:root {
    /* Primary Colors */
    --primary-blue: #3b82f6;
    --primary-purple: #8b5cf6;
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #a855f7 100%);

    /* Dark Theme Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #1a1a24;
    --bg-card: #15151f;
    --bg-card-hover: #1e1e2d;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;

    /* Accent Colors */
    --accent-blue: #60a5fa;
    --accent-purple: #a78bfa;
    --accent-cyan: #22d3ee;

    /* Border & Shadow */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.12);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --glow-blue: rgba(59, 130, 246, 0.3);
    --glow-purple: rgba(139, 92, 246, 0.3);

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

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-color: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.12);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* ================================================
   Base Styles
   ================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

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

/* ================================================
   Navigation
   ================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.9);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo img {
    height: 64px;
    width: auto;
    transition: opacity var(--transition-fast);
}

.logo .logo-small {
    display: none;
}

/* Theme-based logo visibility */
.logo .logo-light {
    display: none;
}

.logo .logo-dark {
    display: block;
}

[data-theme="light"] .logo .logo-dark {
    display: none;
}

[data-theme="light"] .logo .logo-light {
    display: block;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    color: white;
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

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

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle,
.lang-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.theme-toggle:hover,
.lang-toggle:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    background: var(--bg-card);
}

.theme-toggle .fa-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .fa-sun {
    display: block;
}

[data-theme="light"] .theme-toggle .fa-moon {
    display: none;
}

.lang-toggle .lang-text {
    font-weight: 600;
    font-size: 0.8rem;
}

/* Navbar Login Button */
.btn-nav-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 20px;
    background: linear-gradient(135deg, #22d3ee, #0891b2);
    color: white;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 10px rgba(34, 211, 238, 0.3);
    margin-right: 16px;
}

.btn-nav-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.4);
    color: white;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ================================================
   Hero Section
   ================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.4) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.4) 0%, transparent 70%);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.3) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

[data-theme="light"] .gradient-orb {
    opacity: 0.3;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

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

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-title span {
    display: block;
}

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

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 20px var(--glow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--glow-purple);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-light);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    background: rgba(59, 130, 246, 0.1);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Code Window */
.hero-visual {
    display: flex;
    justify-content: center;
}

.code-window {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px var(--shadow-color);
    width: 100%;
    max-width: 500px;
}

.window-header {
    display: flex;
    gap: 8px;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.window-content {
    padding: 24px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
}

.window-content pre {
    margin: 0;
}

.window-content .keyword { color: #c678dd; }
.window-content .variable { color: #e5c07b; }
.window-content .property { color: #61afef; }
.window-content .string { color: #98c379; }
.window-content .method { color: #61afef; }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 13px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateY(0); }
    50% { opacity: 0.3; transform: translateY(6px); }
}

/* ================================================
   Section Styles
   ================================================ */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ================================================
   About Section
   ================================================ */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-normal);
}

.about-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-blue);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 1.75rem;
    color: white;
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ================================================
   Services Section
   ================================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.service-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.service-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-purple);
}

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

.service-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
    margin-bottom: 16px;
}

.service-item h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ================================================
   Products Section
   ================================================ */
.products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    position: relative;
    transition: all var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px var(--shadow-color);
}

.product-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 20px;
}

.product-icon.globix {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.product-icon.forwarder {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
}

.product-icon.flonext {
    background: linear-gradient(135deg, #22d3ee, #0891b2);
}

.product-icon.flopay {
    background: linear-gradient(135deg, #a855f7, #7c3aed);
}

.product-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    padding: 6px 12px;
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-purple);
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.product-card > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.product-features {
    list-style: none;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.product-features i {
    color: var(--accent-blue);
    font-size: 0.8rem;
}

/* Product Active Badge */
.product-badge-active {
    background: rgba(34, 211, 238, 0.2);
    border-color: rgba(34, 211, 238, 0.4);
    color: var(--accent-cyan);
}

/* Product Login Button */
.btn-product {
    margin-top: 24px;
    padding: 12px 24px;
    font-size: 0.95rem;
    width: 100%;
    justify-content: center;
}

.btn-product i {
    font-size: 0.9rem;
}

/* ================================================
   Stats Section
   ================================================ */
.stats {
    background: var(--bg-tertiary);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* ================================================
   Contact Section
   ================================================ */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.contact-details a,
.contact-details p {
    color: var(--text-primary);
    font-size: 1rem;
}

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

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.social-link {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
}

.form-group {
    position: relative;
    margin-bottom: 24px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px var(--glow-blue);
}

.form-group label {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: all var(--transition-fast);
    background: var(--bg-tertiary);
    padding: 0 8px;
}

.form-group textarea ~ label {
    top: 24px;
}

.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label {
    top: 0;
    font-size: 0.8rem;
    color: var(--primary-blue);
}

/* ================================================
   Footer
   ================================================ */
.footer {
    background: var(--bg-secondary);
    padding: 80px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo img {
    height: 56px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links h4,
.footer-products h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links ul,
.footer-products ul {
    list-style: none;
}

.footer-links li,
.footer-products li {
    margin-bottom: 12px;
}

.footer-links a,
.footer-products a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-products a:hover {
    color: var(--primary-blue);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

    .hero-content {
        max-width: 100%;
    }

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

    .hero-visual {
        display: none;
    }

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

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-links li {
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a {
        display: block;
        padding: 16px 0;
    }

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

    .btn-nav-login {
        height: 36px;
        padding: 0 14px;
        font-size: 0.8rem;
        margin-right: 12px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .logo img {
        height: 40px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .section-header {
        margin-bottom: 40px;
    }

    section {
        padding: 60px 0;
    }

    .about-card,
    .service-item,
    .product-card {
        padding: 30px 24px;
    }
}

/* ================================================
   Animations
   ================================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* Mobile Menu Animation */
.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}