/* ==================== */
/* DESIGN SYSTEM        */
/* ==================== */

:root {
    /* Colors - Dark Professional Theme */
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f2e;
    --bg-tertiary: #252d3d;
    
    --text-primary: #ffffff;
    --text-secondary: #b4bcc8;
    --text-tertiary: #7a8390;
    
    --accent-primary: #0ea5e9;
    --accent-secondary: #06b6d4;
    --accent-tertiary: #8b5cf6;
    
    --danger: #ef4444;
    --success: #10b981;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    
    /* 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;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 400ms ease-in-out;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.875rem;
    --radius-xl: 1.25rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* ==================== */
/* BASE STYLES         */
/* ==================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

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

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

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 2.25rem;
    letter-spacing: -0.015em;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

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

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

/* ==================== */
/* LAYOUT              */
/* ==================== */

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-tertiary);
    max-width: 600px;
    margin-bottom: var(--space-3xl);
}

/* ==================== */
/* NAVBAR              */
/* ==================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(15, 20, 25, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    padding: var(--space-lg) 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.cta-btn {
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary) !important;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.cta-btn:hover {
    opacity: 0.9;
}

/* ==================== */
/* BUTTONS             */
/* ==================== */

.btn {
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-block;
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    opacity: 0.95;
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-secondary:hover {
    background-color: rgba(14, 165, 233, 0.1);
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
}

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

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

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

.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-3xl);
    padding: 6rem var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

.hero-content h1 {
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.125rem;
    margin-bottom: var(--space-2xl);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.bot-icon {
    font-size: 12rem;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-30px);
    }
}

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

section {
    padding: var(--space-3xl) var(--space-xl);
}

section h2 {
    margin-bottom: var(--space-lg);
}

/* ==================== */
/* SERVICES SECTION    */
/* ==================== */

.services {
    background-color: var(--bg-secondary);
}

.services .container h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.services .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
}

.service-card {
    background-color: var(--bg-tertiary);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(139, 92, 246, 0.1);
    transition: all var(--transition-base);
    cursor: pointer;
}

.service-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.2);
    background-color: rgba(14, 165, 233, 0.05);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
}

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

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

/* ==================== */
/* HOW IT WORKS        */
/* ==================== */

.how-it-works h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.how-it-works .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-2xl);
}

.step-card {
    background-color: var(--bg-secondary);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(139, 92, 246, 0.1);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
}

.step-card:hover {
    border-color: var(--accent-secondary);
    transform: translateY(-4px);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--bg-primary);
    margin-bottom: var(--space-lg);
}

.step-card h3 {
    margin-bottom: var(--space-md);
}

/* ==================== */
/* PRICING SECTION     */
/* ==================== */

.pricing {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.pricing h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.pricing .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.pricing-card {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.15);
}

.pricing-card.featured {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    transform: scale(1.05);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.pricing-header {
    margin-bottom: var(--space-lg);
}

.pricing-header h3 {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.price-period {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin: 0;
}

.features-list {
    list-style: none;
    margin-bottom: var(--space-xl);
    flex-grow: 1;
}

.features-list li {
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}

.checkmark {
    color: var(--success);
    font-weight: 700;
    margin-right: var(--space-md);
    font-size: 1.25rem;
}

.pricing-card .btn {
    width: 100%;
}

.custom-solution {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
}

.custom-solution h3 {
    margin-bottom: var(--space-md);
}

.custom-solution p {
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==================== */
/* PORTFOLIO SECTION   */
/* ==================== */

.portfolio {
    background-color: var(--bg-secondary);
}

.portfolio h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.portfolio .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-2xl);
}

.portfolio-item {
    background-color: var(--bg-tertiary);
    border: 1px solid rgba(139, 92, 246, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
    text-align: center;
}

.portfolio-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.portfolio-image {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
}

.portfolio-item h3 {
    margin-bottom: var(--space-md);
}

.portfolio-item p {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

.portfolio-link {
    display: inline-block;
    color: var(--accent-primary);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.portfolio-link:hover {
    color: var(--accent-secondary);
    transform: translateX(4px);
}

/* ==================== */
/* FAQ SECTION         */
/* ==================== */

.faq {
    background-color: transparent;
}

.faq h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.faq .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: var(--space-lg);
    border: 1px solid rgba(139, 92, 246, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-secondary);
}

.faq-question {
    width: 100%;
    padding: var(--space-lg);
    background-color: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background-color: rgba(14, 165, 233, 0.05);
    color: var(--accent-primary);
}

.faq-question.active {
    color: var(--accent-primary);
}

.faq-icon {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.faq-question.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    padding: 0 var(--space-lg) 0 var(--space-lg);
    background-color: rgba(14, 165, 233, 0.05);
}

.faq-answer.open {
    max-height: 500px;
    padding: var(--space-lg);
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
}

/* ==================== */
/* TRUST SIGNALS       */
/* ==================== */

.trust-signals {
    background-color: var(--bg-secondary);
    padding: var(--space-3xl) var(--space-xl);
}

.trust-signals h2 {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
}

.trust-item {
    text-align: center;
}

.trust-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
}

.trust-item h3 {
    margin-bottom: var(--space-md);
}

.trust-item p {
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

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

.contact {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.contact h2 {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.contact .section-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    background-color: var(--bg-secondary);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background-color: rgba(14, 165, 233, 0.05);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
}

.checkbox-label input {
    width: auto;
    margin-right: var(--space-md);
}

.form-group button {
    width: 100%;
    margin-bottom: var(--space-md);
}

.form-note {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin: 0;
}

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

.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid rgba(139, 92, 246, 0.1);
    padding: var(--space-3xl) var(--space-xl) var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-section h4 {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.footer-section p {
    margin-bottom: var(--space-sm);
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--space-sm);
}

.footer-section a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(139, 92, 246, 0.1);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

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

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .nav-links {
        gap: var(--space-md);
        font-size: 0.75rem;
    }

    .cta-btn {
        padding: var(--space-xs) var(--space-md);
    }

    .hero {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        min-height: auto;
        padding: 3rem var(--space-lg);
    }

    .hero-visual {
        order: -1;
    }

    .bot-icon {
        font-size: 8rem;
    }

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

    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: 0.95rem;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

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

    section {
        padding: var(--space-2xl) var(--space-lg);
    }

    .services-grid,
    .steps-grid,
    .portfolio-grid,
    .trust-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 var(--space-lg);
    }

    .faq-item {
        margin-bottom: var(--space-md);
    }

    .faq-question {
        padding: var(--space-md);
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 13px;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    .nav-container {
        padding: 0 var(--space-md);
    }

    .nav-links {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .nav-links a:not(.cta-btn) {
        font-size: 0.7rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .hero {
        padding: 2rem var(--space-md);
    }

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

    .btn {
        padding: var(--space-md);
    }

    section {
        padding: var(--space-lg) var(--space-md);
    }

    .container {
        padding: 0 var(--space-md);
    }

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

/* ==================== */
/* ANIMATIONS          */
/* ==================== */

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.service-card {
    animation: slideInUp 0.6s ease-out;
}

.step-card {
    animation: slideInUp 0.6s ease-out;
}

.pricing-card {
    animation: slideInUp 0.6s ease-out;
}

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

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

.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-lg); }
.mt-3 { margin-top: var(--space-2xl); }

.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-lg); }
.mb-3 { margin-bottom: var(--space-2xl); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }