/* ============================================================
   MODULUS DFH — Landing Page Styles
   Built on Modulus design tokens (tokens.css)
   Uses theme-dark by default
   ============================================================ */

/* ── Override for marketing page (larger text than app) ──── */
html, body {
    height: auto;
    overflow: auto;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    user-select: auto;
}

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

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

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

/* ── Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-scrollbar); border-radius: 0; }
::-webkit-scrollbar-thumb:hover { background: var(--color-scrollbar-hover); }

/* ── Nav ───────────────────────────────────────────────── */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-modal);
    background: rgba(26, 26, 26, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
}
.nav-inner {
    max-width: 1100px; margin: 0 auto;
    padding: 14px 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-center { justify-content: center; }
.logo-mark {
    width: 32px; height: 32px;
    background: var(--color-accent); color: var(--color-text-inverse);
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 16px;
}
.logo-text { font-weight: 700; font-size: 16px; color: var(--color-text-primary); }
.logo-accent { color: var(--color-accent); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--color-text-secondary); font-size: 13px; font-weight: var(--font-weight-medium); }
.nav-links a:hover { color: var(--color-text-primary); }
.nav-links .btn-accent {
    padding: 6px 14px; font-size: 12px; height: auto;
    color: #ffffff;
}

/* ── Buttons ───────────────────────────────────────────── */
.btn-accent {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 8px 18px;
    font-size: 13px; font-family: var(--font-family);
    font-weight: var(--font-weight-semi);
    color: var(--color-text-inverse);
    background: var(--color-accent);
    border: 1px solid var(--color-accent);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}
.btn-accent:hover {
    background: var(--color-accent-hover);
    box-shadow: 0 0 0 3px var(--color-accent-ring);
    color: var(--color-text-inverse);
}
.btn-lg { padding: 12px 28px; font-size: 14px; }
.btn-ghost {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 20px;
    font-size: 13px; font-family: var(--font-family);
    font-weight: var(--font-weight-semi);
    color: var(--color-text-primary);
    background: transparent;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}
.btn-ghost:hover {
    border-color: var(--color-text-secondary);
    color: var(--color-text-primary);
}

/* ── Hero ──────────────────────────────────────────────── */
.hero {
    padding: 140px 24px 80px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, var(--color-accent-fill) 0%, transparent 50%);
}
.hero-inner { max-width: 720px; margin: 0 auto; }
.hero-badge {
    display: inline-block; padding: 5px 14px;
    font-size: 11px; font-weight: var(--font-weight-semi);
    color: var(--color-accent);
    background: var(--color-accent-light);
    border: 1px solid var(--color-accent-ring);
    letter-spacing: 0.04em; text-transform: uppercase;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: clamp(32px, 5.5vw, 52px); font-weight: 800;
    line-height: 1.12; margin-bottom: 20px;
    letter-spacing: -0.02em; color: var(--color-text-primary);
}
.hero-sub {
    font-size: 15px; color: var(--color-text-secondary);
    max-width: 540px; margin: 0 auto 28px; line-height: 1.7;
}
.hero-cta { display: flex; gap: 10px; justify-content: center; margin-bottom: 56px; }
.hero-stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
    padding-top: 40px; border-top: 1px solid var(--color-border);
}
.stat-num {
    font-size: 28px; font-weight: 800;
    color: var(--color-text-primary);
}
.stat-label {
    font-size: 11px; color: var(--color-text-tertiary);
    margin-top: 2px; letter-spacing: 0.02em;
}

/* ── Sections ──────────────────────────────────────────── */
.section-inner { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
section h2, .cta-section h2 {
    font-size: clamp(24px, 3.5vw, 36px); font-weight: 800;
    letter-spacing: -0.02em; margin-bottom: 10px;
    color: var(--color-text-primary);
}
.section-sub {
    font-size: 14px; color: var(--color-text-secondary);
    max-width: 520px; margin-bottom: 40px; line-height: 1.7;
}
.section-sub-center { margin-left: auto; margin-right: auto; text-align: center; }

/* ── Features ──────────────────────────────────────────── */
.features { padding: 80px 24px; }
.feature-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 24px;
    transition: border-color var(--transition-normal);
}
.feature-card:hover { border-color: var(--color-accent); }
.feature-icon {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    color: var(--color-accent);
    background: var(--color-accent-light);
    margin-bottom: 14px;
}
.feature-card h3 {
    font-size: 14px; font-weight: var(--font-weight-bold);
    margin-bottom: 6px; color: var(--color-text-primary);
}
.feature-card p {
    font-size: 12px; color: var(--color-text-secondary); line-height: 1.6;
}

/* ── Data ──────────────────────────────────────────────── */
.data-section {
    padding: 80px 24px;
    background: var(--color-surface);
}
.data-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.data-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 24px;
}
.data-card-title {
    font-size: 13px; font-weight: var(--font-weight-semi);
    color: var(--color-text-primary);
    text-transform: uppercase; letter-spacing: 0.06em;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
}
.data-list { display: flex; flex-direction: column; gap: 8px; }
.data-row {
    display: flex; gap: 14px; font-size: 12px;
    padding: 4px 0;
}
.data-label {
    min-width: 120px; font-weight: var(--font-weight-semi);
    color: var(--color-accent); flex-shrink: 0;
}
.data-row span:last-child { color: var(--color-text-secondary); }

/* ── Demo / Chat ───────────────────────────────────────── */
.demo { padding: 80px 24px; }
.demo h2 { text-align: center; }
.chat-container {
    max-width: 760px; margin: 0 auto;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}
.chat-header {
    display: flex; align-items: center; gap: 8px;
    padding: 10px 16px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    font-size: 12px; font-weight: var(--font-weight-semi);
    color: var(--color-text-secondary);
}
.chat-header-dot {
    width: 6px; height: 6px;
    border-radius: var(--radius-round);
    background: var(--color-success);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.chat-messages {
    height: 480px; overflow-y: auto; padding: 16px 20px;
    display: flex; flex-direction: column; gap: 6px;
}

/* ── Messages ──────────────────────────────────────────── */
.msg { display: flex; }
.msg-user { justify-content: flex-end; margin-bottom: 2px; }
.msg-assistant { margin-bottom: 2px; }

.msg-content {
    max-width: 78%; padding: 10px 14px;
    font-size: 13px; line-height: 1.65;
}
.msg-user .msg-content {
    background: var(--color-accent);
    color: var(--color-text-inverse);
    font-weight: var(--font-weight-medium);
}
.msg-assistant .msg-content {
    background: transparent;
    color: var(--color-text-primary);
    padding-left: 0;
    max-width: 92%;
}

/* Inline markdown elements */
.msg-content strong { color: var(--color-text-primary); }
.msg-content code {
    background: var(--color-panel); padding: 1px 5px;
    font-size: 12px; font-family: monospace;
}
.msg-content pre {
    background: var(--color-panel); padding: 10px;
    font-size: 12px; overflow-x: auto; margin: 6px 0;
}
.msg-content .blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: 10px; margin: 6px 0;
    color: var(--color-text-secondary);
}
.msg-content .list-item {
    padding-left: 16px; position: relative; margin: 2px 0;
}
.msg-content .list-item::before {
    content: '–';
    position: absolute; left: 4px;
    color: var(--color-accent);
}

/* ── Typing dots ───────────────────────────────────────── */
.typing-dot {
    display: inline-block; width: 5px; height: 5px;
    border-radius: var(--radius-round);
    background: var(--color-text-tertiary);
    margin: 0 2px;
    animation: dot-bounce 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes dot-bounce { 0%,80%,100% { transform: scale(0.6); opacity: 0.4; } 40% { transform: scale(1); opacity: 1; } }

/* ── Question Widget ───────────────────────────────────── */
.question-widget {
    margin: 4px 0 8px 0;
    display: flex; flex-direction: column; gap: 10px;
    max-width: 480px;
}
.question-label {
    font-size: 13px; font-weight: var(--font-weight-semi);
    color: var(--color-text-primary); line-height: 1.5;
}

/* Radio group */
.radio-group {
    display: flex; flex-direction: column; gap: 4px;
}
.radio-row {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}
.radio-row:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
}
.radio-row.recommended {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
}
.radio-row.selected {
    border-color: var(--color-accent);
    background: var(--color-accent-fill);
}
.radio-row input[type="radio"] {
    accent-color: var(--color-accent);
    width: 14px; height: 14px; flex-shrink: 0;
}
.radio-row span {
    font-size: 13px; color: var(--color-text-primary); flex: 1;
}
.rec-badge {
    font-size: 10px !important; font-weight: var(--font-weight-semi) !important;
    color: var(--color-accent) !important; flex: none !important;
    text-transform: uppercase; letter-spacing: 0.05em;
}
.other-row span { color: var(--color-text-secondary) !important; }

/* Other / text inputs */
.other-input-wrap { padding: 0 2px; }
.other-input, .other-input.standalone {
    width: 100%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 9px 12px;
    color: var(--color-text-primary);
    font-size: 13px; font-family: var(--font-family);
    outline: none;
    transition: border-color var(--transition-normal);
}
.other-input:focus { border-color: var(--color-accent); }

/* Submit button */
.question-submit {
    align-self: flex-start;
    padding: 8px 20px;
    font-size: 12px;
}

/* ── Input area ────────────────────────────────────────── */
.chat-input-area {
    display: flex; gap: 8px; padding: 12px 16px;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}
.chat-input-area textarea {
    flex: 1;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 10px 14px;
    color: var(--color-text-primary);
    font-size: 13px; font-family: var(--font-family);
    resize: none; outline: none;
    transition: border-color var(--transition-normal);
}
.chat-input-area textarea:focus { border-color: var(--color-accent); }
.chat-input-area .btn-accent { align-self: flex-end; padding: 8px 16px; }

.chat-footer {
    padding: 10px 16px; text-align: center;
    font-size: 10px; color: var(--color-text-tertiary);
    border-top: 1px solid var(--color-border);
    letter-spacing: 0.02em;
}

/* ── CTA ───────────────────────────────────────────────── */
.cta-section {
    padding: 80px 24px; text-align: center;
    background: radial-gradient(ellipse at 50% 100%, var(--color-accent-fill) 0%, transparent 50%);
}
.cta-sub {
    color: var(--color-text-secondary); font-size: 14px; margin-bottom: 28px;
}

/* ── Footer ────────────────────────────────────────────── */
.footer {
    padding: 40px 24px; text-align: center;
    border-top: 1px solid var(--color-border);
}
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer .logo { margin-bottom: 12px; }
.footer-text { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 12px; }
.footer-links { margin-bottom: 12px; }
.footer-links a { font-size: 12px; color: var(--color-text-secondary); margin: 0 12px; }
.footer-links a:hover { color: var(--color-accent); }
.footer-copy { font-size: 10px; color: var(--color-text-tertiary); }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: 1fr; }
    .nav-links a:not(.btn-accent) { display: none; }
    .hero-cta { flex-direction: column; align-items: center; }
    .data-row { flex-direction: column; gap: 2px; }
    .data-label { min-width: auto; }
}