:root {
    --bg: #0b0f17;
    --surface: #131a26;
    --surface-2: #1a2333;
    --border: #243049;
    --text: #e8edf6;
    --text-dim: #9aa6bd;
    --accent: #4f8cff;
    --accent-2: #7c5cff;
    --radius: 16px;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

body.payment-open {
    overflow: hidden;
}

.buy-button {
    border: 0;
    cursor: pointer;
    font: inherit;
}

.payment-modal[hidden] {
    display: none;
}

.payment-modal {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    padding: 20px;
}

.payment-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 6, 12, 0.78);
}

.payment-dialog {
    position: relative;
    width: min(560px, 100%);
    max-height: 90vh;
    overflow-y: auto;
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
}

.payment-dialog h2 {
    margin-bottom: 8px;
}

.payment-summary {
    color: var(--text-dim);
    margin-bottom: 20px;
}

.payment-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
}

.payment-form label {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.payment-email-note {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.5;
}

.payment-form input,
.payment-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    outline: none;
    background: var(--bg);
    color: var(--text);
    font: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.payment-form input:focus,
.payment-form textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.25);
}

#payment-widget {
    margin: 16px -12px 0;
    padding: 12px;
    border-radius: 12px;
    background: #fff;
    color-scheme: light;
}

.payment-close {
    position: absolute;
    top: 10px;
    right: 14px;
    border: 0;
    background: transparent;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 30px;
    line-height: 1;
}

.payment-close:hover {
    color: var(--text);
}

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

code {
    font-family: Consolas, "Courier New", monospace;
    background: var(--surface-2);
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 0.92em;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(12px);
    background: rgba(11, 15, 23, 0.8);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 24px;
}

.logo {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.5px;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--text-dim);
    transition: color 0.2s;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 10px 25px rgba(79, 140, 255, 0.35);
}

.btn-primary:hover {
    box-shadow: 0 14px 32px rgba(79, 140, 255, 0.5);
}

.btn-ghost {
    color: var(--text);
    border-color: var(--border);
    background: transparent;
}

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

.btn-small {
    padding: 8px 18px;
    font-size: 0.95rem;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

/* Hero */
.hero {
    padding: 96px 0 72px;
    background:
        radial-gradient(900px 500px at 15% -10%, rgba(79, 140, 255, 0.22), transparent 60%),
        radial-gradient(700px 400px at 90% 10%, rgba(124, 92, 255, 0.18), transparent 60%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 56px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.85rem;
    color: var(--accent);
    background: rgba(79, 140, 255, 0.12);
    border: 1px solid rgba(79, 140, 255, 0.3);
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(2.2rem, 4.5vw, 3.4rem);
    line-height: 1.15;
    font-weight: 800;
    margin-bottom: 20px;
}

.lead {
    font-size: 1.15rem;
    color: var(--text-dim);
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin: 32px 0;
    flex-wrap: wrap;
}

.hero-meta {
    list-style: none;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    color: var(--text-dim);
    font-size: 0.95rem;
}

.hero-meta li::before {
    content: "\2713\20";
    color: var(--accent);
}

/* Mock window */
.mock-window {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    transform: perspective(1200px) rotateY(-6deg) rotateX(3deg);
}

.mock-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.mock-bar span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border);
}

.mock-bar span:nth-child(1) { background: #ff5f57; }
.mock-bar span:nth-child(2) { background: #febc2e; }
.mock-bar span:nth-child(3) { background: #28c840; }

.mock-chart {
    height: 180px;
    display: flex;
    align-items: flex-end;
    gap: 10px;
    padding: 16px;
    background: var(--surface-2);
    border-radius: 12px;
}

.mock-chart .bar {
    flex: 1;
    height: var(--h);
    border-radius: 6px 6px 0 0;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    opacity: 0.85;
}

.mock-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 16px;
}

.mock-stats div {
    background: var(--surface-2);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
}

.mock-stats strong {
    font-size: 0.8rem;
    color: var(--text-dim);
    font-weight: 600;
}

.mock-stats span {
    font-size: 1.4rem;
    font-weight: 700;
}

/* Sections */
.section {
    padding: 96px 0;
}

.section-alt {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--text-dim);
    font-size: 1.05rem;
    margin-bottom: 48px;
    max-width: 640px;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: transform 0.25s, border-color 0.25s;
}

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

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

.card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.card p {
    color: var(--text-dim);
    font-size: 0.97rem;
}

/* Download */
.download-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.download-box .section-subtitle {
    margin-bottom: 20px;
}

.checklist {
    list-style: none;
    color: var(--text-dim);
}

.checklist li::before {
    content: "\2022\20";
    color: var(--accent);
}

.download-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.version {
    color: var(--text-dim);
    font-size: 0.9rem;
}

/* Steps */
.steps {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    counter-reset: step;
}

.steps li {
    display: flex;
    gap: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.step-num {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.steps h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.steps p {
    color: var(--text-dim);
    font-size: 0.95rem;
}

/* Feedback form */
.feedback-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}

.feedback-form label {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feedback-form label span {
    font-size: 0.9rem;
    color: var(--text-dim);
}

.feedback-form input,
.feedback-form textarea {
    font: inherit;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.feedback-form input:focus,
.feedback-form textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.25);
}

.feedback-form textarea {
    resize: vertical;
}

.form-status {
    min-height: 1.4em;
    font-size: 0.95rem;
    text-align: center;
}

.form-status-ok {
    color: #4cd964;
}

.form-status-error {
    color: #ff6b6b;
}

.btn:disabled {
    opacity: 0.6;
    cursor: wait;
    transform: none;
}

/* Screenshots */
.hero-visual {
    position: relative;
}

.hero-shot {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: perspective(1200px) rotateY(-6deg) rotateX(3deg);
}

.shot {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 80px;
}

.shot:last-child {
    margin-bottom: 0;
}

.shot-reverse {
    grid-template-columns: 1fr 1.6fr;
}

.shot-reverse img {
    order: 2;
}

.shot img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    background: var(--surface);
}

.shot-text h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.shot-text p {
    color: var(--text-dim);
    font-size: 1rem;
}

.updates-note {
    margin-top: 32px;
    text-align: center;
    color: var(--text-dim);
}

/* Demo */
.demo-box {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px 32px;
}

.demo-badge {
    position: absolute;
    top: -14px;
    left: 32px;
    padding: 4px 16px;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #1a1204;
    background: #ffb020;
}

.demo-list {
    list-style: none;
    display: grid;
    gap: 12px;
    color: var(--text-dim);
}

.demo-list li::before {
    content: "\2022\20";
    color: #ffb020;
}

/* Pricing */
.pricing {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    align-items: stretch;
}

.price-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px 28px;
    transition: transform 0.25s, border-color 0.25s;
}

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

.price-card-featured {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), var(--shadow);
}

.price-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.price-card h3 {
    font-size: 1.2rem;
}

.price {
    font-size: 2.6rem;
    font-weight: 800;
}

.price-note {
    color: var(--text-dim);
    margin-bottom: 12px;
    flex-grow: 1;
}

/* Footer */
.site-footer {
    padding: 28px 0;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.9rem;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

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

.requisites {
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-grid,
    .feedback-grid,
    .shot,
    .shot-reverse {
        grid-template-columns: 1fr;
    }

    .shot,
    .shot-reverse {
        gap: 24px;
        margin-bottom: 56px;
    }

    .shot-reverse img {
        order: 0;
    }

    .hero-shot,
    .mock-window {
        transform: none;
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 520px) {
    .hero {
        padding: 64px 0 48px;
    }

    .section {
        padding: 64px 0;
    }

    .feedback-form {
        padding: 24px;
    }
}