/* ── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-deep: #0D0B0E;
    --bg-card: rgba(26, 31, 46, 0.5);
    --bg-card-hover: rgba(26, 31, 46, 0.8);
    --border: rgba(34, 211, 238, 0.15);
    --border-hover: rgba(200, 80, 192, 0.4);
    --cyan: #22d3ee;
    --purple: #8b5cf6;
    --pink: #c850c0;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 300;
    background: var(--bg-deep);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Atkinson Hyperlegible', system-ui, sans-serif;
    font-weight: 400;
}

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

.gradient-text {
    background: linear-gradient(135deg, #22d3ee 0%, #8b5cf6 50%, #c850c0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Header ──────────────────────────────────────────── */
#header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(13, 11, 14, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo { width: 48px; height: 48px; border-radius: 50%; }

.brand-name {
    font-family: 'Atkinson Hyperlegible', sans-serif;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text);
}

.brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

nav { display: flex; gap: 24px; align-items: center; }

.nav-link {
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.2s;
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
}

.nav-link:hover {
    color: var(--cyan);
    border-bottom-color: var(--cyan);
}

.chat-link {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: var(--bg-deep) !important;
    padding: 8px 18px;
    border-radius: 6px;
    font-weight: 600;
    border: none !important;
}

.chat-link:hover { opacity: 0.9; color: var(--bg-deep) !important; }

/* ── Hero ────────────────────────────────────────────── */
#hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    background: radial-gradient(ellipse at 50% 60%, rgba(34, 211, 238, 0.04) 0%, transparent 60%);
}

.hero-content {
    max-width: 750px;
    text-align: center;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: var(--bg-deep);
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    transition: opacity 0.2s;
}

.btn-primary:hover { opacity: 0.9; color: var(--bg-deep); }

.btn-secondary {
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.2s;
}

.btn-secondary:hover { border-color: var(--cyan); color: var(--cyan); }

/* ── Sections ────────────────────────────────────────── */
section { padding: 80px 24px; }

.section-inner {
    max-width: 1100px;
    margin: 0 auto;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 32px;
    text-align: center;
}

/* ── About ───────────────────────────────────────────── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.about-card {
    background: var(--bg-card);
    border-left: 2px solid var(--cyan);
    padding: 28px;
    border-radius: 4px;
    transition: all 0.3s;
}

.about-card:hover { background: var(--bg-card-hover); border-left-color: var(--purple); }
.about-card p { color: var(--text-muted); margin-bottom: 12px; }
.about-card p:last-child { margin-bottom: 0; }
.about-card strong { color: var(--cyan); }

/* ── Services ────────────────────────────────────────── */
#services { background: rgba(19, 22, 32, 0.5); }

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.service-card {
    background: transparent;
    border: 1px solid var(--border);
    padding: 28px;
    border-radius: 8px;
    transition: all 0.3s;
}

.service-card:hover { border-color: var(--border-hover); background: var(--bg-card); }

.service-icon {
    font-size: 32px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.service-card h3 {
    color: var(--purple);
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.service-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 16px; }

.service-card ul {
    list-style: none;
    padding: 0;
}

.service-card li {
    color: var(--text-muted);
    font-size: 13px;
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.service-card li::before {
    content: '';
    position: absolute;
    left: 0; top: 11px;
    width: 6px; height: 6px;
    background: var(--cyan);
    border-radius: 50%;
}

.pricing-bar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 20px 28px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.pricing-bar span:first-child {
    font-size: 1.2rem;
    color: var(--text);
}

.pricing-bar strong {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.6rem;
}

.pricing-note { color: var(--text-dim); font-size: 13px; }

/* ── Capabilities ────────────────────────────────────── */
.cap-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.cap-card {
    background: var(--bg-card);
    border-left: 2px solid var(--cyan);
    padding: 24px;
    border-radius: 4px;
    transition: all 0.3s;
}

.cap-card:hover { border-left-color: var(--pink); background: var(--bg-card-hover); }
.cap-card h4 { color: var(--cyan); margin-bottom: 8px; font-size: 15px; }
.cap-card p { color: var(--text-muted); font-size: 14px; }

/* ── Chat ────────────────────────────────────────────── */
#chat { background: rgba(13, 11, 14, 0.8); }

.chat-intro {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: -16px auto 32px;
    font-size: 15px;
}

#chat-container {
    max-width: 700px;
    margin: 0 auto;
    background: rgba(19, 22, 32, 0.6);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 500px;
}

#chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.msg { max-width: 85%; }
.msg.anima { align-self: flex-start; }
.msg.user { align-self: flex-end; }

.msg-name {
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 4px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.msg.user .msg-name { text-align: right; }

.msg-text {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
}

.msg.anima .msg-text {
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.15);
    color: var(--text);
}

.msg.user .msg-text {
    background: rgba(139, 92, 246, 0.12);
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: var(--text);
}

.msg-text a {
    color: #22d3ee;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.msg-text a:hover {
    color: #67e8f9;
}

#chat-input-area {
    display: flex;
    border-top: 1px solid var(--border);
    background: rgba(13, 11, 14, 0.5);
}

#chat-input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 16px 20px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    outline: none;
}

#chat-input::placeholder { color: var(--text-dim); }

#chat-send {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    color: var(--bg-deep);
    border: none;
    padding: 16px 28px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.2s;
}

#chat-send:hover { opacity: 0.85; }

/* ── Footer ──────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    padding: 32px 24px;
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-logo { width: 36px; height: 36px; border-radius: 50%; }
.footer-links { display: flex; gap: 24px; font-size: 13px; }
.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--cyan); }

/* ── Scrollbar ───────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: rgba(34, 211, 238, 0.2); border-radius: 3px; }

/* ── Typing indicator ────────────────────────────────── */
.typing-dots { display: inline-flex; gap: 4px; padding: 4px 0; }
.typing-dots span {
    width: 6px; height: 6px;
    background: var(--cyan);
    border-radius: 50%;
    animation: blink 1.4s infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.3; } 40% { opacity: 1; } }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
    nav { display: none; }
    .about-grid, .services-grid, .cap-grid { grid-template-columns: 1fr; }
    .pricing-bar { flex-direction: column; text-align: center; }
    #chat-container { height: 400px; }
}