/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4F46E5;
    --primary-dark: #3730A3;
    --primary-light: #818CF8;
    --accent: #06B6D4;
    --dark: #0F172A;
    --dark-2: #1E293B;
    --dark-3: #334155;
    --gray: #94A3B8;
    --gray-light: #CBD5E1;
    --light: #F8FAFC;
    --white: #FFFFFF;
    --green: #10B981;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --radius: 12px;
    --radius-lg: 20px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 3.5vw, 3rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-nav {
    background: var(--gradient);
    color: white;
    padding: 10px 24px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
    border-radius: 12px;
}

.btn-full {
    width: 100%;
}

/* ===== NAVIGATION ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
}

.nav.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    padding: 10px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: white;
    font-weight: 700;
    font-size: 1.3rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: white;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s;
}

/* ===== LANGUAGE TOGGLE ===== */
.lang-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 6px 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.lang-flag {
    color: white;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.nav-right-mobile {
    display: none;
    align-items: center;
    gap: 12px;
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--dark);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(79, 70, 229, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 60%);
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    text-align: center;
    color: white;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(79, 70, 229, 0.2);
    border: 1px solid rgba(79, 70, 229, 0.3);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero h1 {
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--gray);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--dark-3);
}

/* ===== SECTIONS ===== */
.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--dark);
    color: white;
}

.section-accent {
    background: var(--dark-2);
    color: white;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-dark .section-badge,
.section-accent .section-badge {
    background: rgba(79, 70, 229, 0.2);
    border-color: rgba(79, 70, 229, 0.3);
    color: var(--primary-light);
}

.section-header p {
    font-size: 1.15rem;
    color: var(--gray);
    max-width: 600px;
    margin: 16px auto 0;
}

/* ===== PROBLEM SECTION ===== */
.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.problem-text h2 {
    margin-bottom: 20px;
}

.problem-text p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.problem-text strong {
    color: white;
}

.problem-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.problem-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
}

.problem-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.problem-item h4 {
    margin-bottom: 4px;
}

.problem-item p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ===== SERVICES ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    position: relative;
    padding: 36px 28px;
    background: var(--light);
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.service-card.featured {
    background: var(--dark);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary), var(--shadow-xl);
}

.service-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    padding: 4px 14px;
    background: var(--gradient);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.service-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card > p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.service-card.featured > p {
    color: var(--gray-light);
}

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

.service-features li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    font-size: 0.9rem;
    color: var(--dark-3);
}

.service-card.featured .service-features li {
    color: var(--gray-light);
}

.service-features li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.service-card.featured .service-features li::before {
    color: var(--accent);
}

/* ===== INDUSTRIES ===== */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.industry-card {
    padding: 28px 24px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    text-align: center;
}

.industry-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(79, 70, 229, 0.3);
    transform: translateY(-4px);
}

.industry-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.industry-card h3 {
    margin-bottom: 8px;
}

.industry-card p {
    color: var(--gray);
    font-size: 0.85rem;
}

/* ===== PROCESS ===== */
.process-grid {
    display: flex;
    align-items: flex-start;
    gap: 0;
}

.process-step {
    flex: 1;
    padding: 32px 24px;
    text-align: center;
}

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

.process-step h3 {
    margin-bottom: 12px;
}

.process-step p {
    color: var(--gray);
    font-size: 0.9rem;
}

.process-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin-top: 55px;
    flex-shrink: 0;
}

/* ===== TECH STACK ===== */
.tech-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: transform 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-4px);
}

.tech-logo {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    object-fit: contain;
    background: rgba(255, 255, 255, 0.05);
    padding: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-logo-fallback {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-item span {
    font-size: 0.85rem;
    color: var(--gray-light);
    font-weight: 500;
}

/* ===== CASE STUDIES ===== */
.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: var(--light);
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.case-industry {
    padding: 4px 12px;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.case-result-badge {
    padding: 4px 12px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--green);
}

.case-card h3 {
    margin-bottom: 20px;
    font-size: 1.15rem;
}

.case-section {
    margin-bottom: 16px;
}

.case-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--primary);
    margin-bottom: 6px;
}

.case-section p {
    color: var(--dark-3);
    font-size: 0.9rem;
    line-height: 1.5;
}

.case-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding-top: 20px;
    border-top: 1px solid #E2E8F0;
    margin-top: 20px;
}

.case-metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.metric-label {
    display: block;
    font-size: 0.7rem;
    color: var(--gray);
    font-weight: 500;
}

/* ===== CTA / CONTACT ===== */
.section-cta {
    background: var(--dark);
    color: white;
    padding: 100px 0;
}

.cta-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    margin-bottom: 16px;
}

.cta-content > p {
    color: var(--gray);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.cta-form {
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-input {
    width: 100%;
    padding: 14px 18px;
    background: var(--dark-2);
    border: 1px solid var(--dark-3);
    border-radius: 10px;
    color: white;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.3s;
    outline: none;
}

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

.form-input:focus {
    border-color: var(--primary);
}

.form-textarea {
    margin-bottom: 20px;
    resize: vertical;
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394A3B8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

select.form-input option {
    background: var(--dark-2);
    color: white;
}

.form-note {
    text-align: center;
    color: var(--gray);
    font-size: 0.85rem;
    margin-top: 12px;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark);
    color: white;
    padding: 60px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--gray);
    margin-top: 12px;
    font-size: 0.9rem;
}

.footer-links h4 {
    margin-bottom: 16px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray-light);
}

.footer-links a {
    display: block;
    color: var(--gray);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 4px 0;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom p {
    color: var(--gray);
    font-size: 0.85rem;
}

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .industries-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .case-studies-grid {
        grid-template-columns: 1fr;
    }

    .process-grid {
        flex-wrap: wrap;
        justify-content: center;
    }

    .process-connector {
        display: none;
    }

    .process-step {
        flex: 0 0 45%;
    }

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

    .tech-grid {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 24px;
        z-index: 999;
    }

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

    .nav-links a {
        font-size: 1.2rem;
        color: white;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-right-mobile {
        display: flex;
    }

    .nav-links .lang-toggle {
        display: none;
    }

    .problem-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .process-step {
        flex: 0 0 100%;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-divider {
        display: none;
    }

    .tech-grid {
        gap: 24px;
    }

    .tech-logo,
    .tech-logo-fallback {
        width: 52px;
        height: 52px;
    }

    .case-metrics {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}