/* ==========================================
   VARIABLES & DESIGN SYSTEM
   ========================================== */
:root {
    /* Colors */
    --bg-dark: #09090b;
    --bg-card: #121217;
    --bg-card-hover: #1a1a22;
    --bg-header: rgba(9, 9, 11, 0.8);
    
    --accent-purple: #8b5cf6;
    --accent-purple-glow: rgba(139, 92, 246, 0.25);
    --accent-purple-dark: #6d28d9;
    
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(139, 92, 246, 0.4);

    /* Layout */
    --container-width: 1200px;
    --section-padding: 100px 0;
    --border-radius: 12px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   BASE STYLES
   ========================================== */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 100% 50%, rgba(109, 40, 217, 0.04) 0%, transparent 40%);
    background-attachment: fixed;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding);
}

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

.section__subtitle {
    display: inline-block;
    color: var(--accent-purple);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.section__title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn--primary {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-dark));
    color: #ffffff;
    box-shadow: 0 4px 20px var(--accent-purple-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(139, 92, 246, 0.4);
}

.btn--secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn--secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--bg-header);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.logo__text {
    color: var(--text-main);
}

.logo__dot {
    color: var(--accent-purple);
}

.nav__list {
    display: flex;
    gap: 32px;
}

.nav__link {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 400;
    transition: var(--transition);
}

.nav__link:hover {
    color: var(--text-main);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
}

.burger span {
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    transition: var(--transition);
}

/* ==========================================
   HERO
   ========================================== */
.hero {
    padding: 180px 0 100px 0;
}

.hero__container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero__badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid var(--border-hover);
    border-radius: 20px;
    color: var(--accent-purple);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero__description {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 36px;
    max-width: 540px;
}

.hero__actions {
    display: flex;
    gap: 16px;
}

.hero__visual {
    position: relative;
}

.hero__glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: var(--accent-purple);
    filter: blur(120px);
    opacity: 0.3;
    z-index: -1;
}

.hero__card-mockup {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.hero__card-header {
    display: flex;
    gap: 8px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.hero__card-body {
    padding: 32px 24px;
    color: var(--accent-purple);
    font-family: monospace;
    font-size: 0.9rem;
}

/* ==========================================
   ABOUT
   ========================================== */
.about__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 48px;
    border-radius: var(--border-radius);
}

.about__text {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.about_text + .about_text {
    margin-top: 20px;
}

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

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    background: var(--bg-card-hover);
}

.service-card__icon {
    font-size: 2rem;
    margin-bottom: 20px;
}

.service-card__title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.service-card__desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 24px;
    flex-grow: 1;
}

.service-card__link {
    color: var(--accent-purple);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.service-card__link:hover {
    color: var(--text-main);
}

/* ==========================================
   PORTFOLIO
   ========================================== */
.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

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

.portfolio-card:hover {
    border-color: var(--border-hover);
}

.portfolio-card__tag {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--accent-purple);
    border: 1px solid var(--accent-purple-glow);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 16px;
}

.portfolio-card__title {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.portfolio-card__desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ==========================================
   CALCULATOR
   ========================================== */
.calculator__wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: var(--border-radius);
}

.calc-group {
    margin-bottom: 24px;
}

.calc-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
}

.calc-select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
}

.calc-select option {
    background-color: var(--bg-dark);
    color: var(--text-main);
}

.calc-checkboxes {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.calc-checkboxes label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
}

.calc-result {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.calc-result__title {
    font-size: 1rem;
    color: var(--text-muted);
}

.calc-result__price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-purple);
    margin: 12px 0;
}

.calc-result__note {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ==========================================
   PROCESS
   ========================================== */
.process__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

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

.process-step__num {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-purple);
    display: block;
    margin-bottom: 8px;
}

.process-step__title {
    font-size: 1.1rem;
}

/* ==========================================
   TECH
   ========================================== */
.tech__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--border-radius);
    text-align: center;
}

.tech-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--accent-purple);
}

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

/* ==========================================
   REVIEWS & FAQ
   ========================================== */
.reviews__placeholder {
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    padding: 40px;
    text-align: center;
    border-radius: var(--border-radius);
    color: var(--text-muted);
}

.faq__list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq__item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: var(--transition);
}

.faq__item[open] {
    border-color: var(--border-hover);
}

.faq__question {
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq__question::-webkit-details-marker {
    display: none;
}

.faq__question::after {
    content: '+';
    color: var(--accent-purple);
    font-size: 1.2rem;
}

.faq_item[open] .faq_question::after {
    content: '-';
}

.faq__answer {
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ==========================================
   CTA & FOOTER
   ========================================== */
.cta__card {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), var(--bg-card));
    border: 1px solid var(--border-hover);
    padding: 60px 20px;
    text-align: center;
    border-radius: var(--border-radius);
}

.cta__title {
    font-size: 2rem;
    margin-bottom: 12px;
}

.cta__desc {
    color: var(--text-muted);
    margin-bottom: 28px;
}

.footer {
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px 0;
    background: var(--bg-dark);
}

.footer__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    text-align: center;
}

.footer__tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
}

.footer__links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer__links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer__copy {
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    width: 100%;
    padding-top: 24px;
}