:root {
    --bg: #f5f9fc;
    --panel: #ffffff;
    --panel-soft: #eef5fb;
    --line: rgba(15, 70, 102, 0.12);
    --text: #0c2333;
    --muted: #557086;
    --primary: #0d7db6;
    --primary-strong: #085f89;
    --primary-soft: #dff3ff;
    --shadow: 0 20px 50px rgba(8, 44, 73, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(13, 125, 182, 0.12), transparent 26%),
        radial-gradient(circle at top right, rgba(13, 125, 182, 0.08), transparent 24%),
        var(--bg);
    color: var(--text);
    line-height: 1.6;
}

img {
    max-width: 100%;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.95rem 5vw;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.brand-logo {
    width: 60px;
    filter: drop-shadow(0 6px 18px rgba(13, 125, 182, 0.15));
}

.brand-copy strong {
    display: block;
    color: var(--primary-strong);
    font-size: 1.05rem;
}

.brand-copy span {
    display: block;
    color: var(--muted);
    font-size: 0.82rem;
}

.nav-links {
    display: flex;
    gap: 1.2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-strong);
    font-weight: 700;
}

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

main {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 2rem 0 3rem;
}

.hero {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 2rem;
    align-items: center;
    padding: 1.5rem 0 2.5rem;
}

.eyebrow {
    display: inline-block;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-strong);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.72rem;
    font-weight: 800;
}

.hero h1 {
    margin: 0.9rem 0 1rem;
    font-size: clamp(2.3rem, 4.8vw, 4rem);
    line-height: 1.04;
    color: #0a2637;
}

.hero p,
.mode-card p,
.persona-card p,
.benefit-card p,
.step-card p,
.chat-copy p {
    color: var(--muted);
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0 2rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.92rem 1.25rem;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 800;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(13, 125, 182, 0.18);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-strong), var(--primary));
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--primary-strong);
    border: 1px solid rgba(13, 125, 182, 0.24);
}

.stats-grid,
.steps-grid,
.personas-grid,
.benefits-grid {
    display: grid;
    gap: 1rem;
}

.stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card,
.step-card,
.mode-card,
.persona-card,
.benefit-card,
.radar-card,
.brand-panel,
.phone-mockup {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}

.stat-card {
    padding: 1rem;
}

.stat-card strong {
    color: var(--primary-strong);
    display: block;
    font-size: 1.05rem;
}

.stat-card span {
    color: var(--muted);
    font-size: 0.92rem;
}

.hero-visual {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.brand-panel {
    display: grid;
    place-items: center;
    padding: 1.1rem;
    min-height: 160px;
}

.logo-orbit {
    width: 160px;
    height: 160px;
    display: grid;
    place-items: center;
    border-radius: 32px;
    background: linear-gradient(180deg, #ffffff, #f1f8fd);
    border: 1px solid rgba(13, 125, 182, 0.12);
}

.logo-orbit img {
    width: 116px;
    animation: float 4s ease-in-out infinite;
}

.radar-card {
    padding: 1.2rem;
    position: relative;
    overflow: hidden;
}

.radar-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(13, 125, 182, 0.04), transparent 55%);
    pointer-events: none;
}

.radar-title {
    font-weight: 800;
    color: #0a2740;
    margin-bottom: 1rem;
}

.radar-ring {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    margin: 1rem auto;
    border: 2px solid rgba(13, 125, 182, 0.24);
    position: relative;
    box-shadow: inset 0 0 0 12px rgba(13, 125, 182, 0.06);
    animation: pulse 3s ease-in-out infinite;
}

.radar-ring::before,
.radar-ring::after {
    content: "";
    position: absolute;
    inset: 18px;
    border-radius: 50%;
    border: 1px solid rgba(13, 125, 182, 0.55);
}

.radar-ring::after {
    inset: 45px;
}

.radar-metrics {
    display: grid;
    gap: 0.6rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.section {
    margin-top: 2rem;
    padding: 1.5rem 0;
}

.section-heading {
    margin-bottom: 1.2rem;
}

.section-heading-inline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.section h2 {
    margin: 0.8rem 0 0;
    font-size: clamp(1.6rem, 4vw, 2.5rem);
    color: #0a2637;
}

.steps-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.step-card {
    padding: 1.2rem;
}

.step-number {
    display: inline-grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary-strong);
    font-weight: 800;
}

.step-card h3,
.mode-card h3,
.persona-card h3,
.benefit-card h3 {
    margin: 0.8rem 0 0.5rem;
    color: #0a2637;
}

.toggle-group {
    display: inline-flex;
    gap: 0.5rem;
    padding: 0.35rem;
    background: #f0f7fb;
    border: 1px solid rgba(13, 125, 182, 0.18);
    border-radius: 999px;
}

.toggle-btn {
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    padding: 0.65rem 1rem;
    cursor: pointer;
    font-weight: 800;
}

.toggle-btn.active {
    background: linear-gradient(135deg, var(--primary-strong), var(--primary));
    color: white;
}

.mode-content {
    margin-top: 1rem;
}

.mode-content.hidden {
    display: none;
}

.mode-card {
    padding: 1.3rem;
}

.mode-card ul,
.persona-card ul,
.chat-copy ul {
    padding-left: 1.2rem;
    color: var(--muted);
}

.chat-layout {
    display: grid;
    grid-template-columns: 0.92fr 1.08fr;
    align-items: center;
    gap: 1.5rem;
}

.phone-mockup {
    max-width: 360px;
    padding: 1rem;
    margin: 0 auto;
}

.phone-notch {
    width: 110px;
    height: 18px;
    border-radius: 0 0 12px 12px;
    background: #0a2637;
    margin: 0 auto 0.8rem;
}

.chat-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.8rem 0.9rem;
    background: #f3f9fd;
    border-radius: 14px;
}

.chat-header span {
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
}

.chat-header strong {
    color: #0a2637;
}

.chat-messages {
    display: grid;
    gap: 0.8rem;
    margin-top: 1rem;
    min-height: 230px;
}

.message {
    max-width: 86%;
    padding: 0.82rem 1rem;
    border-radius: 16px;
    font-size: 0.92rem;
    animation: rise 0.5s ease;
}

.message.incoming {
    background: var(--primary-soft);
    color: #0a2637;
    border-top-left-radius: 4px;
}

.personas-grid,
.benefits-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.persona-card,
.benefit-card {
    padding: 1.25rem;
}

.footer {
    padding: 1.5rem 1rem 2rem;
    text-align: center;
    color: var(--muted);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.03); opacity: 0.92; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 920px) {
    .hero,
    .chat-layout,
    .steps-grid,
    .stats-grid,
    .personas-grid,
    .benefits-grid,
    .brand-panel {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 0.5rem;
    }

    .topbar {
        flex-direction: column;
        gap: 0.8rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 620px) {
    main {
        width: min(100% - 1rem, 1180px);
    }

    .hero h1 {
        font-size: 2.1rem;
    }

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

    .btn {
        width: 100%;
    }
}