:root {
    --bg: #080b10;
    --bg-soft: #0d121a;
    --surface: rgba(18, 25, 35, 0.78);
    --surface-strong: #121923;
    --line: rgba(255, 255, 255, 0.1);
    --text: #f6fbff;
    --muted: #a4b1c1;
    --cyan: #35d4ff;
    --mint: #4ee4a8;
    --amber: #ffbd59;
    --danger: #ff6b7a;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
    --radius: 8px;
    --font: Tahoma, "Segoe UI", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    direction: rtl;
    font-family: var(--font);
    background:
        radial-gradient(circle at top left, rgba(53, 212, 255, 0.17), transparent 34rem),
        radial-gradient(circle at 82% 14%, rgba(255, 189, 89, 0.13), transparent 28rem),
        linear-gradient(180deg, #080b10 0%, #0b1017 55%, #080b10 100%);
    color: var(--text);
    line-height: 1.8;
}

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

button,
input {
    font: inherit;
}

.container {
    width: min(1140px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(20px);
    background: rgba(8, 11, 16, 0.72);
    border-bottom: 1px solid var(--line);
}

.nav {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    letter-spacing: 0;
}

.brand-mark {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(53, 212, 255, 0.42);
    background: linear-gradient(135deg, rgba(53, 212, 255, 0.18), rgba(78, 228, 168, 0.12));
    border-radius: var(--radius);
    box-shadow: 0 0 30px rgba(53, 212, 255, 0.12);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 22px;
    color: var(--muted);
    font-size: 14px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 46px;
    padding: 0 18px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    font-weight: 800;
    transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

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

.button.primary {
    color: #041014;
    background: linear-gradient(135deg, var(--cyan), var(--mint));
    box-shadow: 0 18px 44px rgba(53, 212, 255, 0.2);
}

.button.ghost {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--line);
}

.hero {
    min-height: calc(100vh - 76px);
    display: grid;
    align-items: center;
    padding: 80px 0 54px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 0.9fr;
    align-items: center;
    gap: 56px;
}

.hero h1 {
    margin: 0;
    font-size: clamp(42px, 7vw, 84px);
    line-height: 1.08;
    letter-spacing: 0;
}

.hero p {
    max-width: 650px;
    margin: 24px 0 0;
    color: var(--muted);
    font-size: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.hero-proof {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 44px;
}

.proof-item,
.feature-card,
.testimonial,
.faq-item,
.auth-card,
.success-card {
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}

.proof-item {
    padding: 16px;
}

.proof-item strong {
    display: block;
    font-size: 22px;
}

.proof-item span {
    color: var(--muted);
    font-size: 13px;
}

.phone-stage {
    position: relative;
    min-height: 620px;
    display: grid;
    place-items: center;
}

.phone {
    width: min(360px, 100%);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 34px;
    padding: 14px;
    background: linear-gradient(180deg, #161e2a, #070a0f);
    box-shadow: 0 34px 90px rgba(0, 0, 0, 0.5);
    animation: float 5s ease-in-out infinite;
}

.phone-screen {
    min-height: 570px;
    border-radius: 24px;
    padding: 24px;
    overflow: hidden;
    background:
        radial-gradient(circle at 30% 15%, rgba(53, 212, 255, 0.22), transparent 9rem),
        linear-gradient(180deg, #101722, #070a0e);
}

.chat-line {
    display: flex;
    gap: 10px;
    margin: 14px 0;
}

.chat-line.user {
    justify-content: flex-end;
}

.bubble {
    max-width: 78%;
    padding: 12px 14px;
    border-radius: 8px;
    color: #eaf8ff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
}

.user .bubble {
    color: #041014;
    background: linear-gradient(135deg, var(--cyan), var(--mint));
}

.tool-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 26px;
}

.tool-tile {
    min-height: 82px;
    padding: 10px;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--line);
    color: var(--muted);
    font-size: 12px;
}

.section {
    padding: 86px 0;
}

.section-title {
    max-width: 760px;
}

.section-title h2 {
    margin: 0;
    font-size: clamp(30px, 4vw, 48px);
    line-height: 1.25;
}

.section-title p {
    color: var(--muted);
    margin: 14px 0 0;
}

.features-grid {
    margin-top: 34px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.feature-card,
.testimonial,
.faq-item {
    padding: 22px;
}

.feature-card svg,
.auth-logo svg {
    color: var(--cyan);
}

.feature-card h3,
.testimonial h3,
.faq-item h3 {
    margin: 12px 0 8px;
    font-size: 18px;
}

.feature-card p,
.testimonial p,
.faq-item p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.download-band {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 24px;
    padding: 34px;
    border: 1px solid rgba(78, 228, 168, 0.28);
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(53, 212, 255, 0.13), rgba(78, 228, 168, 0.06));
}

.testimonials-grid,
.faq-grid {
    margin-top: 34px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.site-footer {
    border-top: 1px solid var(--line);
    padding: 28px 0;
    color: var(--muted);
    font-size: 14px;
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px 0;
}

.auth-shell {
    width: min(1080px, calc(100% - 32px));
    display: grid;
    grid-template-columns: 0.9fr 1fr;
    gap: 28px;
    align-items: stretch;
}

.auth-card,
.success-card {
    padding: 28px;
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 900;
}

.auth-card h1,
.success-card h1 {
    margin: 28px 0 8px;
    font-size: clamp(28px, 5vw, 42px);
    line-height: 1.25;
}

.auth-card p,
.success-card p {
    color: var(--muted);
    margin: 0 0 22px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.field {
    display: grid;
    gap: 7px;
}

.field.full {
    grid-column: 1 / -1;
}

.field label {
    color: #d9e7f4;
    font-size: 13px;
    font-weight: 800;
}

.field input {
    width: 100%;
    min-height: 48px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    padding: 0 14px;
    outline: none;
}

.field input:focus {
    border-color: rgba(53, 212, 255, 0.65);
    box-shadow: 0 0 0 3px rgba(53, 212, 255, 0.12);
}

.error {
    color: var(--danger);
    font-size: 12px;
}

.alert {
    padding: 12px 14px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    color: #ffd6dc;
    background: rgba(255, 107, 122, 0.1);
    border: 1px solid rgba(255, 107, 122, 0.22);
}

.device-panel {
    padding: 26px;
    border-radius: var(--radius);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03)),
        radial-gradient(circle at top, rgba(53, 212, 255, 0.16), transparent 18rem);
    border: 1px solid var(--line);
}

.device-panel dl {
    display: grid;
    gap: 12px;
    margin: 22px 0 0;
}

.device-panel div {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

.device-panel dt {
    color: var(--muted);
}

.device-panel dd {
    margin: 0;
    text-align: left;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}

@media (max-width: 900px) {
    .nav-links {
        display: none;
    }

    .hero-grid,
    .auth-shell,
    .download-band {
        grid-template-columns: 1fr;
    }

    .phone-stage {
        min-height: auto;
    }

    .features-grid,
    .testimonials-grid,
    .faq-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 620px) {
    .container {
        width: min(100% - 22px, 1140px);
    }

    .hero {
        padding-top: 46px;
    }

    .hero-proof,
    .features-grid,
    .testimonials-grid,
    .faq-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .phone {
        width: 100%;
    }

    .auth-card,
    .success-card,
    .device-panel,
    .download-band {
        padding: 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation: none !important;
        transition: none !important;
    }
}