:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.75rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;

  --font-display: 'General Sans', 'Satoshi', system-ui, sans-serif;
  --font-body: 'Satoshi', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --radius-sm: 8px; --radius-md: 14px; --radius-lg: 22px; --radius-full: 999px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --content: 1180px;

  /* Brand */
  --navy: #0B1B3F;
  --blue: #2F7BFF;
  --blue-deep: #1F63E0;
  --sky: #CFE2FF;
  --midnight: #0B1220;
  --cream: #FAF7F0;
}

:root, [data-theme='light'] {
  --color-bg: #FAF7F0;
  --color-surface: #FFFFFF;
  --color-surface-2: #F2EEE5;
  --color-border: rgba(11, 27, 63, 0.12);
  --color-text: #0B1B3F;
  --color-text-muted: #4E5A73;
  --color-text-faint: #7C8699;
  --color-code-bg: #0B1220;
  --color-tint: #E7EFFF;
  --color-bubble-in: #E9E6DE;
  --shadow-md: 0 10px 30px -12px rgba(11, 27, 63, 0.18);
  --shadow-lg: 0 30px 60px -24px rgba(11, 27, 63, 0.28);
}

[data-theme='dark'] {
  --color-bg: #0B1220;
  --color-surface: #111A2E;
  --color-surface-2: #16213A;
  --color-border: rgba(207, 226, 255, 0.12);
  --color-text: #F3F5FA;
  --color-text-muted: #A9B4CC;
  --color-text-faint: #7D89A3;
  --color-code-bg: #070C17;
  --color-tint: rgba(47, 123, 255, 0.14);
  --color-bubble-in: #26314A;
  --shadow-md: 0 10px 30px -12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 30px 60px -24px rgba(0, 0, 0, 0.6);
}

body { background: var(--color-bg); color: var(--color-text); }

.container { width: min(100% - 2.5rem, var(--content)); margin-inline: auto; }
.section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--blue);
  margin-bottom: var(--space-4);
}
.eyebrow::before { content: '>'; font-weight: 700; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.02em; line-height: 1.08; }
h2 { font-size: var(--text-2xl); font-weight: 600; max-width: 18ch; }
h3 { font-size: var(--text-lg); font-weight: 600; letter-spacing: -0.01em; font-family: var(--font-body); }
.lead { font-size: var(--text-base); color: var(--color-text-muted); max-width: 58ch; margin-top: var(--space-4); }
.accent { color: var(--blue); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font: 600 var(--text-sm)/1 var(--font-body); padding: 0.85em 1.35em; border-radius: var(--radius-full);
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: transform .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-deep); }
.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--blue); outline-offset: 2px;
}

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 86%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .3s var(--ease);
}
.header.scrolled { border-bottom-color: var(--color-border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: var(--space-6); }
.logo-link { display: inline-flex; color: var(--color-text); }
.logo { height: 34px; width: auto; display: block; }
.nav-links { display: flex; gap: var(--space-8); list-style: none; }
.nav-links a { color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); font-weight: 500; }
.nav-links a:hover { color: var(--color-text); }
.nav-actions { display: flex; align-items: center; gap: var(--space-3); }
.signin { background: none; border: 0; color: var(--color-text-muted); font: 500 var(--text-sm) var(--font-body); cursor: pointer; padding: var(--space-2); }
.signin:hover { color: var(--color-text); }
.icon-btn {
  width: 40px; height: 40px; display: grid; place-items: center; border-radius: var(--radius-full);
  border: 1px solid var(--color-border); background: transparent; color: var(--color-text); cursor: pointer;
}

/* Hero */
.hero { padding-block: clamp(var(--space-12), 7vw, var(--space-24)) clamp(var(--space-16), 8vw, var(--space-24)); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center; }
.hero h1 { font-size: var(--text-3xl); font-weight: 600; max-width: 13ch; }
.hero .lead { font-size: var(--text-lg); line-height: 1.5; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-8); }
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-6); margin-top: var(--space-8); color: var(--color-text-muted); font-size: var(--text-sm); }
.hero-meta span { display: inline-flex; align-items: center; gap: var(--space-2); }
.hero-meta svg { color: var(--blue); flex: none; }

/* Hero visual: chat + terminal */
.stage { position: relative; display: flex; flex-direction: column; }
.phone {
  position: relative; margin-left: auto; width: min(100%, 360px);
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 34px;
  box-shadow: var(--shadow-lg); padding: var(--space-5) var(--space-4) 72px;
}
.phone-top { display: flex; flex-direction: column; align-items: center; gap: 4px; padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-border); }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--color-tint); display: grid; place-items: center; color: var(--blue); }
.avatar svg { width: 24px; height: 24px; }
.phone-top strong { font-size: var(--text-sm); }
.phone-top small { font-size: var(--text-xs); color: var(--color-text-faint); }
.thread { display: flex; flex-direction: column; gap: var(--space-2); padding-top: var(--space-4); min-height: 320px; }
.msg {
  max-width: 78%; padding: 0.6em 0.9em; border-radius: 20px; font-size: var(--text-sm); line-height: 1.4;
  opacity: 0; transform: translateY(8px) scale(.98); transition: opacity .45s var(--ease), transform .45s var(--ease);
}
.msg.show { opacity: 1; transform: none; }
.msg.out { align-self: flex-end; background: var(--blue); color: #fff; border-bottom-right-radius: 6px; }
.msg.in { align-self: flex-start; background: var(--color-bubble-in); color: var(--color-text); border-bottom-left-radius: 6px; }
.msg-meta { align-self: flex-end; font-size: var(--text-xs); color: var(--color-text-faint); opacity: 0; transition: opacity .4s; }
.msg-meta.show { opacity: 1; }
.typing { align-self: flex-start; display: inline-flex; gap: 4px; padding: 0.75em 0.9em; border-radius: 20px; background: var(--color-bubble-in); opacity: 0; transition: opacity .3s; }
.typing.show { opacity: 1; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--color-text-faint); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .15s; } .typing i:nth-child(3) { animation-delay: .3s; }
@keyframes blink { 0%, 60%, 100% { opacity: .3; } 30% { opacity: 1; } }

.term {
  position: relative; margin-top: -56px; align-self: flex-start; width: min(88%, 380px);
  background: var(--color-code-bg); color: #DCE6FA; border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg); font-family: var(--font-mono); font-size: 0.8125rem; line-height: 1.65;
  border: 1px solid rgba(207,226,255,.08); overflow: hidden;
}
.term-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid rgba(207,226,255,.08); }
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: #2A3550; }
.term-bar span { margin-left: 8px; font-size: 0.75rem; color: #7D89A3; }
.term pre { padding: 14px 16px; white-space: pre-wrap; word-break: break-word; }
.c-blue { color: #7FB2FF; } .c-dim { color: #7D89A3; } .c-ok { color: #8BD5B5; } .c-str { color: #F2C98A; }

/* Strip */
.strip { border-block: 1px solid var(--color-border); padding-block: var(--space-6); }
.strip-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4) var(--space-8); color: var(--color-text-muted); font-size: var(--text-sm); }
.strip-inner strong { color: var(--color-text); font-weight: 600; }
.chips { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.chip { font-family: var(--font-mono); font-size: var(--text-xs); padding: 0.4em 0.8em; border-radius: var(--radius-full); border: 1px solid var(--color-border); color: var(--color-text-muted); }

/* Problem */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(var(--space-8), 6vw, var(--space-24)); align-items: center; }
.compare { display: grid; gap: var(--space-4); }
.compare-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); }
.compare-card h3 { font-size: var(--text-base); display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-3); }
.compare-card ul { list-style: none; display: grid; gap: var(--space-2); color: var(--color-text-muted); font-size: var(--text-sm); }
.compare-card li { display: flex; gap: var(--space-2); }
.compare-card li::before { content: '–'; color: var(--color-text-faint); }
.compare-card.good { border-color: color-mix(in srgb, var(--blue) 40%, transparent); background: var(--color-tint); }
.compare-card.good li::before { content: '✓'; color: var(--blue); font-weight: 700; }
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }

/* Features */
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: var(--space-6); margin-bottom: var(--space-12); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6); transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--blue) 45%, transparent); }
.card .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--color-tint); color: var(--blue); margin-bottom: var(--space-5); }
.card p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-2); }

/* AI / MCP band */
.band { background: var(--midnight); color: #F3F5FA; border-radius: clamp(0px, 3vw, 32px); margin-inline: clamp(0px, 2vw, 24px); }
[data-theme='dark'] .band { background: #0E1730; border: 1px solid var(--color-border); }
.band .lead { color: #A9B4CC; }
.band h2 { color: #fff; }
.band-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: start; }
.tool-list { list-style: none; display: grid; gap: var(--space-3); margin-top: var(--space-8); }
.tool-list li { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); align-items: baseline; }
.tool-list code { font-family: var(--font-mono); font-size: var(--text-xs); color: #7FB2FF; background: rgba(47,123,255,.12); padding: .25em .55em; border-radius: 6px; }
.tool-list span { color: #A9B4CC; font-size: var(--text-sm); }
.agent-chat { background: #111A2E; border: 1px solid rgba(207,226,255,.1); border-radius: var(--radius-lg); overflow: hidden; }
.agent-chat .term-bar span { color: #A9B4CC; }
.agent-body { padding: var(--space-6); display: grid; gap: var(--space-4); font-size: var(--text-sm); }
.turn { display: grid; gap: var(--space-2); }
.turn b { font-size: var(--text-xs); color: #7D89A3; font-weight: 500; }
.turn p { color: #E6ECF8; }
.toolcall { font-family: var(--font-mono); font-size: 0.8125rem; background: #070C17; border-radius: var(--radius-sm); padding: var(--space-3) var(--space-4); color: #DCE6FA; border: 1px solid rgba(207,226,255,.08); white-space: pre-wrap; word-break: break-word; }

/* Developers */
.dev-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: start; }
.checks { list-style: none; display: grid; gap: var(--space-3); margin-top: var(--space-8); }
.checks li { display: flex; gap: var(--space-3); color: var(--color-text-muted); font-size: var(--text-sm); }
.checks li::before { content: ''; flex: none; width: 18px; height: 18px; margin-top: 2px; border-radius: 50%; background: var(--blue) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/11px no-repeat; }
.code { background: var(--color-code-bg); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); border: 1px solid rgba(207,226,255,.08); }
.tabs { display: flex; gap: 2px; padding: 8px; border-bottom: 1px solid rgba(207,226,255,.08); }
.tab { background: none; border: 0; color: #7D89A3; font: 500 0.8125rem var(--font-mono); padding: 6px 12px; border-radius: 8px; cursor: pointer; }
.tab[aria-selected='true'] { color: #fff; background: rgba(47,123,255,.18); }
.code pre { font-family: var(--font-mono); font-size: 0.8125rem; line-height: 1.7; color: #DCE6FA; padding: var(--space-5) var(--space-6); overflow-x: auto; min-height: 290px; }
.code pre[hidden] { display: none; }

/* Flexible */
.flex-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.rule {
  display: flex; gap: var(--space-4); align-items: flex-start; padding: var(--space-6);
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
}
.rule .ic { flex: none; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: var(--color-tint); color: var(--blue); }
.rule p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-1); }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); counter-reset: s; }
.step { padding: var(--space-8) var(--space-6); border-top: 2px solid var(--blue); }
.step::before { counter-increment: s; content: '0' counter(s); font-family: var(--font-mono); font-size: var(--text-sm); color: var(--blue); display: block; margin-bottom: var(--space-4); }
.step p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-2); }

/* Plans */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); align-items: stretch; }
.plan { display: flex; flex-direction: column; gap: var(--space-4); padding: var(--space-8) var(--space-6); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.plan.featured { border-color: var(--blue); box-shadow: 0 0 0 1px var(--blue), var(--shadow-md); }
.plan .tag { align-self: flex-start; font-size: var(--text-xs); font-weight: 600; color: var(--blue); background: var(--color-tint); padding: .3em .75em; border-radius: var(--radius-full); }
.plan .price { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; letter-spacing: -0.02em; }
.plan .price small { font-family: var(--font-body); font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; letter-spacing: 0; }
.plan p { color: var(--color-text-muted); font-size: var(--text-sm); }
.plan ul { list-style: none; display: grid; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); flex: 1; }
.plan li::before { content: '✓  '; color: var(--blue); font-weight: 700; }
.fine { margin-top: var(--space-6); color: var(--color-text-faint); font-size: var(--text-xs); }

/* FAQ */
.faq { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--color-border); padding-block: var(--space-5); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: var(--space-4); font-weight: 600; font-size: var(--text-base); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; color: var(--blue); font-size: 1.4em; line-height: 1; transition: transform .3s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-3); max-width: 68ch; }

/* Request form */
.request-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: start; }
.form-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: clamp(var(--space-6), 4vw, var(--space-10)); box-shadow: var(--shadow-md); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.field { display: grid; gap: var(--space-2); }
.field.full { grid-column: 1 / -1; }
.field label { font-size: var(--text-sm); font-weight: 600; }
.field label span { color: var(--color-text-faint); font-weight: 400; }
.field input, .field select, .field textarea {
  font: 400 var(--text-sm) var(--font-body); color: var(--color-text); background: var(--color-bg);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0.8em 0.9em; width: 100%;
  transition: border-color .2s;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: color-mix(in srgb, var(--blue) 40%, var(--color-border)); }
.field .err { font-size: var(--text-xs); color: #D6455D; min-height: 1em; }
[data-theme='dark'] .field .err { color: #FF8A9C; }
.field.invalid input, .field.invalid select { border-color: #D6455D; }
.volume { display: grid; grid-template-columns: 1fr auto; gap: var(--space-2); }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4); margin-top: var(--space-6); }
.form-foot small { color: var(--color-text-faint); font-size: var(--text-xs); max-width: 40ch; }
.success { text-align: left; display: grid; gap: var(--space-4); }
.success .ic { width: 52px; height: 52px; border-radius: 50%; background: var(--color-tint); color: var(--blue); display: grid; place-items: center; }
.success p { color: var(--color-text-muted); font-size: var(--text-sm); }
.summary { font-family: var(--font-mono); font-size: var(--text-xs); background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: var(--space-4); white-space: pre-wrap; color: var(--color-text-muted); }
.contact-points { list-style: none; display: grid; gap: var(--space-4); margin-top: var(--space-8); }
.contact-points li { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); }
.contact-points strong { color: var(--color-text); display: block; }
.contact-points .ic { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; background: var(--color-tint); color: var(--blue); }

/* Footer */
.footer { border-top: 1px solid var(--color-border); padding-block: var(--space-12) var(--space-8); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-8); }
.footer h4 { font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-3); }
.footer ul { list-style: none; display: grid; gap: var(--space-2); }
.footer a { color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); }
.footer a:hover { color: var(--blue); }
.footer p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-3); max-width: 34ch; }
.legal { margin-top: var(--space-12); display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); color: var(--color-text-faint); font-size: var(--text-xs); }

/* Modal */
.modal { position: fixed; inset: 0; display: none; place-items: center; background: rgba(7, 12, 23, .55); z-index: 100; padding: var(--space-4); }
.modal.open { display: grid; }
.modal-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: var(--space-8); max-width: 420px; width: 100%; box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); display: grid; gap: var(--space-4); }
.modal-card p { color: var(--color-text-muted); font-size: var(--text-sm); }
.modal-card .row { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .msg, .msg-meta { opacity: 1 !important; transform: none !important; transition: none !important; }
  .typing i { animation: none; }
}

/* Responsive */
@media (max-width: 980px) {
  .hero-grid, .split, .band-grid, .dev-grid, .request-grid { grid-template-columns: 1fr; }
  .grid-3, .plans, .steps { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid-3, .plans, .steps, .flex-grid, .form-grid { grid-template-columns: 1fr; }
  .logo { height: 28px; }
  .signin { display: none; }
  .phone { margin-inline: auto; }
  .term { align-self: center; width: 94%; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-actions .btn { padding: .75em 1em; }
}

[hidden] { display: none !important; }
.plan ul { align-content: start; }