:root {
    --bg: #05070d;
    --card: #101624;
    --accent: #2de1fc;
    --accent-dark: #0ab0d4;
    --text: #f3f5ff;
    --muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.08);
    font-family: "Space Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: radial-gradient(circle at top, rgba(45, 225, 252, 0.08), transparent 50%), var(--bg);
    color: var(--text);
}

a {
    text-decoration: none;
}

.hero {
    padding: 4rem clamp(1rem, 5vw, 4rem) 2rem;
    text-align: center;
    background: linear-gradient(135deg, rgba(45, 225, 252, 0.25), rgba(15, 10, 53, 0.8));
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin: 0.3rem 0;
}

.hero p {
    margin: 0 auto 1.5rem;
    max-width: 52ch;
    color: var(--muted);
}

.hero__badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero__cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.hero__stats {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.hero__stats div {
    border: 1px solid var(--border);
    padding: 0.9rem 1.2rem;
    border-radius: 1rem;
    min-width: 150px;
    background: rgba(0, 0, 0, 0.25);
}

.stat__label {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
}

.stat__value {
    font-size: 1.8rem;
    font-weight: 600;
}

main {
    padding: 2rem clamp(1rem, 5vw, 4rem) 4rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.features article,
.predictor,
.insights,
.assistant-panel,
.chat-shell,
.insight-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 1.4rem;
    padding: 1.5rem;
    box-shadow: 0 25px 50px rgba(5, 7, 13, 0.45);
}

.features h3 {
    margin-top: 0;
}

.predictor {
    margin-bottom: 3rem;
}

.assistant-panel {
    margin-bottom: 3rem;
}

.assistant-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
    gap: 1.5rem;
}

.chat-shell {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
}

.chat-log {
    background: rgba(3, 6, 15, 0.4);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1rem;
    max-height: 420px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-message {
    padding: 0.8rem 1rem;
    border-radius: 1rem;
    white-space: pre-wrap;
}

.chat-message.user {
    background: rgba(45, 225, 252, 0.08);
    align-self: flex-end;
}

.chat-message.assistant {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
}

.chat-meta {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 0.4rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
}

.insight-card {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.muted {
    color: var(--muted);
}

.visually-hidden {
    position: absolute;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.section-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 1rem;
    color: var(--text);
    padding: 1rem;
    font-size: 1rem;
    resize: vertical;
}

textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 2px rgba(45, 225, 252, 0.2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.5rem;
    border-radius: 999px;
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

.btn.primary {
    background: var(--accent);
    color: #020617;
}

.btn.primary:hover {
    background: var(--accent-dark);
}

.btn.ghost {
    border: 1px solid var(--border);
    color: var(--text);
}

.btn.full {
    width: 100%;
    margin-top: 1rem;
}

.result {
    border: 1px dashed var(--accent);
    border-radius: 1rem;
    padding: 1.2rem;
    margin-top: 1.5rem;
}

.hidden {
    display: none;
}

.insights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

ul li {
    padding: 0.4rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.chat-shell textarea {
    background: rgba(255, 255, 255, 0.05);
}

footer {
    text-align: center;
    padding: 2rem 1rem 3rem;
    color: var(--muted);
}

@media (max-width: 600px) {
    .hero__stats div {
        min-width: 120px;
    }
}

@media (max-width: 960px) {
    .assistant-grid {
        grid-template-columns: 1fr;
    }
}