@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

/* ---- DESIGN TOKENS ---- */
:root {
  --bg: #060A13;
  --bg-surface: #0C1121;
  --bg-card: #111827;
  --bg-card-hover: #162033;
  --bg-input: #0D1421;

  --blue: #5B8AF5;
  --blue-light: #7BA3FF;
  --blue-dark: #3D6FDB;
  --blue-rgb: 91, 138, 245;

  --cyan: #00C8E8;
  --cyan-light: #33D9F5;
  --cyan-rgb: 0, 200, 232;

  --text: #E2E8F8;
  --text-2: #94A3B8;
  --text-3: #4B5680;

  --border: rgba(91, 138, 245, 0.12);
  --border-2: rgba(91, 138, 245, 0.24);

  --green: #10B981;
  --green-bg: rgba(16, 185, 129, 0.08);
  --red: #F55B5B;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.5), 0 4px 16px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 32px rgba(var(--blue-rgb), 0.18);

  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 9999px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);

  --nav-h: 72px;
  --max-w: 1200px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul { list-style: none; }
input, textarea, select { font: inherit; }
[hidden] { display: none !important; }

/* ---- TYPOGRAPHY ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--blue-light) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-light);
}

/* ---- LAYOUT ---- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- NAVIGATION ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.3s, backdrop-filter 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(6, 10, 19, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.nav__link {
  padding: 7px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--r-sm);
  transition: color 0.2s, background 0.2s;
}

.nav__link:hover, .nav__link.active {
  color: var(--text);
  background: rgba(var(--blue-rgb), 0.08);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  transition: background 0.2s;
}

.nav__toggle:hover { background: rgba(var(--blue-rgb), 0.08); }

.nav__toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  border-radius: var(--r-full);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav__toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--r-md);
  transition: all 0.2s var(--ease);
  white-space: nowrap;
  line-height: 1;
}

.btn--primary {
  background: var(--blue);
  color: #fff;
}
.btn--primary:hover {
  background: var(--blue-light);
  box-shadow: 0 4px 20px rgba(var(--blue-rgb), 0.4);
  transform: translateY(-1px);
}

.btn--secondary {
  background: rgba(var(--blue-rgb), 0.1);
  color: var(--blue-light);
  border: 1px solid var(--border);
}
.btn--secondary:hover {
  background: rgba(var(--blue-rgb), 0.18);
  border-color: var(--border-2);
}

.btn--outline {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
}
.btn--outline:hover {
  color: var(--text);
  border-color: var(--border-2);
  background: rgba(var(--blue-rgb), 0.05);
}

.btn--lg {
  padding: 14px 28px;
  font-size: 0.95rem;
  border-radius: var(--r-lg);
}

.btn--sm {
  padding: 7px 14px;
  font-size: 0.8rem;
  border-radius: var(--r-sm);
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--nav-h) 0 96px;
  overflow: hidden;
}

.hero__bg { position: absolute; inset: 0; z-index: 0; }

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.hero__glow {
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 700px;
  background: radial-gradient(ellipse at center, rgba(var(--blue-rgb), 0.1) 0%, transparent 65%);
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--blue-rgb), 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--blue-rgb), 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  width: 100%;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(var(--cyan-rgb), 0.07);
  border: 1px solid rgba(var(--cyan-rgb), 0.2);
  border-radius: var(--r-full);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: 32px;
  letter-spacing: 0.02em;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

.hero__title {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.hero__subtitle {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-2);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__scroll-arrow { animation: bounce 2s infinite; }

/* ---- PAGE HERO (inner pages) ---- */
.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 64px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 400px;
  background: radial-gradient(ellipse at 50% -20%, rgba(var(--blue-rgb), 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.page-hero__label {
  margin-bottom: 16px;
}

.page-hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 20px;
  position: relative;
}

.page-hero__desc {
  font-size: 1.1rem;
  color: var(--text-2);
  max-width: 540px;
  line-height: 1.75;
  position: relative;
}

/* ---- SECTIONS ---- */
section { padding: 96px 0; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: block;
  width: 18px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: var(--r-full);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 520px;
  line-height: 1.75;
}

/* ---- BAND (surface sections) ---- */
.band {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 0;
}

/* ---- CARDS ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--border-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.card__icon {
  width: 44px;
  height: 44px;
  background: rgba(var(--blue-rgb), 0.1);
  border: 1px solid rgba(var(--blue-rgb), 0.18);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.card__icon--cyan {
  background: rgba(var(--cyan-rgb), 0.1);
  border-color: rgba(var(--cyan-rgb), 0.18);
}

.card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card__desc {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ---- FEATURES GRID ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ---- USE CASE GRID ---- */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.use-case-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: rgba(var(--blue-rgb), 0.1);
  border-radius: var(--r-full);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--blue-light);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

/* ---- PROBLEM ITEMS ---- */
.problem-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.problem-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-size: 0.875rem;
}

.problem-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 91, 91, 0.1);
  border-radius: var(--r-sm);
}

/* ---- CAPABILITY SECTIONS (platform page) ---- */
.capability {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.capability:last-child { border-bottom: none; }

.capability.flip { direction: rtl; }
.capability.flip > * { direction: ltr; }

.capability__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.capability__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-2);
}

.capability__list li::before {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  background: var(--cyan);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---- MOCK UI VISUALS ---- */
.mock-ui {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.mock-ui__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.mock-ui__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.mock-ui__title {
  font-size: 0.78rem;
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--text-3);
  margin-left: 6px;
}

.mock-ui__body { padding: 20px; }

.mock-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  margin-bottom: 6px;
  font-size: 0.8rem;
  transition: background 0.2s;
}

.mock-row:last-child { margin-bottom: 0; }
.mock-row:hover { background: rgba(var(--blue-rgb), 0.05); }

.mock-row__name { color: var(--text); font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.78rem; }
.mock-row__status {
  padding: 2px 8px;
  border-radius: var(--r-full);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.status--trusted { background: rgba(16, 185, 129, 0.12); color: #10B981; }
.status--verified { background: rgba(var(--blue-rgb), 0.12); color: var(--blue-light); }
.status--blocked { background: rgba(245, 91, 91, 0.12); color: var(--red); }
.status--allow { background: rgba(16, 185, 129, 0.12); color: #10B981; }
.status--deny { background: rgba(245, 91, 91, 0.12); color: var(--red); }

.mock-arrow {
  color: var(--text-3);
  font-size: 0.7rem;
  padding: 0 8px;
}

/* ---- CALLOUT ---- */
.callout {
  background: linear-gradient(135deg, rgba(var(--blue-rgb), 0.07) 0%, rgba(var(--cyan-rgb), 0.04) 100%);
  border: 1px solid rgba(var(--blue-rgb), 0.18);
  border-radius: var(--r-xl);
  padding: 80px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.callout::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 50%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--blue-rgb), 0.5), transparent);
}

.callout__title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 20px;
}

.callout__desc {
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.callout__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---- PRINCIPLES GRID ---- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.principle {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}

.principle__number {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--blue-light), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.principle__title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.principle__desc {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* ---- CONTACT FORM ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 28px;
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  background: rgba(var(--blue-rgb), 0.1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info__label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-3);
  margin-bottom: 4px;
}

.contact-info__value {
  font-size: 0.9rem;
  color: var(--text-2);
}

.form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}

.form-group:last-of-type { margin-bottom: 0; }

.form-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(var(--blue-rgb), 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.6;
}

.form-input::placeholder, .form-textarea::placeholder { color: var(--text-3); }

.form-select { appearance: none; cursor: pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%234B5680' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.form-select option { background: var(--bg-card); }

/* ---- SUCCESS MESSAGE ---- */
.success-msg {
  display: none;
  text-align: center;
  padding: 48px 32px;
}

.success-msg.show { display: block; animation: fadeInUp 0.5s var(--ease); }

.success-icon {
  width: 64px;
  height: 64px;
  background: var(--green-bg);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.success-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.success-desc {
  color: var(--text-2);
  line-height: 1.7;
  max-width: 380px;
  margin: 0 auto 32px;
}

/* ---- FOOTER ---- */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}

.footer__top {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  margin-bottom: 48px;
}

.footer__logo { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer__logo-text { font-family: var(--font-display); font-size: 1rem; font-weight: 700; letter-spacing: -0.03em; }
.footer__tagline { font-size: 0.85rem; color: var(--text-3); }

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

.footer__col h4 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
}

.footer__col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-2);
  padding: 4px 0;
  transition: color 0.2s;
}

.footer__col a:hover { color: var(--text); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-3);
}

/* ---- ANIMATIONS ---- */
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(7px); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.animate-in.visible { opacity: 1; transform: translateY(0); }

.stagger .animate-in:nth-child(1) { transition-delay: 0.05s; }
.stagger .animate-in:nth-child(2) { transition-delay: 0.12s; }
.stagger .animate-in:nth-child(3) { transition-delay: 0.19s; }
.stagger .animate-in:nth-child(4) { transition-delay: 0.26s; }
.stagger .animate-in:nth-child(5) { transition-delay: 0.33s; }
.stagger .animate-in:nth-child(6) { transition-delay: 0.40s; }

/* ---- ABOUT PAGE ---- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-quote {
  font-size: 1.4rem;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-2);
  border-left: 3px solid var(--blue);
  padding-left: 24px;
  margin: 32px 0;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .capability { grid-template-columns: 1fr; gap: 40px; }
  .capability.flip { direction: ltr; }
  .footer__top { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .principles-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }

  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0; bottom: 0;
    flex-direction: column;
    background: rgba(6, 10, 19, 0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 4px;
    align-items: stretch;
    z-index: 99;
  }

  .nav__links.open { display: flex; }

  .nav__link {
    padding: 14px 16px;
    font-size: 1rem;
  }

  .nav__toggle { display: flex; }

  .nav__actions .btn--primary { display: none; }

  .hero__title { font-size: 2.2rem; }
  .features-grid { grid-template-columns: 1fr; }
  .use-case-grid { grid-template-columns: 1fr; }
  .principles-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  section { padding: 64px 0; }
  .band { padding: 56px 0; }
  .callout { padding: 48px 24px; }
  .form-wrap { padding: 28px; }

  .footer__links { grid-template-columns: repeat(2, 1fr); }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero__actions { flex-direction: column; width: 100%; }
  .hero__actions .btn { width: 100%; }
  .callout__actions { flex-direction: column; }
  .callout__actions .btn { width: 100%; }
}

/* ---- LOGIN PAGE ---- */
.login-main {
  padding: calc(var(--nav-h) + 48px) 24px 96px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.login-main::before {
  content: '';
  position: absolute;
  top: -15%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(var(--blue-rgb), 0.1) 0%, transparent 65%);
  pointer-events: none;
}

.login-main::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--blue-rgb), 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--blue-rgb), 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.login-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 40px;
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 0 1px rgba(var(--blue-rgb), 0.05);
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 55%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--blue-rgb), 0.5), transparent);
}

.login-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.login-sub {
  font-size: 0.875rem;
  color: var(--text-2);
  margin-bottom: 28px;
  line-height: 1.5;
}

.login-error {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(245, 91, 91, 0.07);
  border: 1px solid rgba(245, 91, 91, 0.22);
  border-radius: var(--r-md);
  font-size: 0.845rem;
  color: #F87171;
  margin-bottom: 20px;
  animation: fadeInUp 0.25s var(--ease);
  line-height: 1.5;
}

.login-error.rate-limit {
  background: rgba(245, 166, 35, 0.07);
  border-color: rgba(245, 166, 35, 0.22);
  color: #FBBF24;
}

.pw-wrap {
  position: relative;
}

.pw-wrap .form-input {
  padding-right: 44px;
}

.pw-toggle {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  transition: color 0.2s;
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.pw-toggle:hover { color: var(--text-2); }

.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0 20px;
  font-size: 0.75rem;
  color: var(--text-3);
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.login-footer-text {
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--text-3);
  text-align: center;
  position: relative;
  z-index: 1;
  line-height: 1.6;
}

.login-footer-text a {
  color: var(--blue-light);
  transition: color 0.2s;
}

.login-footer-text a:hover { color: var(--cyan-light); }

.login-security {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.72rem;
  color: var(--text-3);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.spinning { animation: spin 0.75s linear infinite; }

/* ---- UTILITIES ---- */
.flex { display: flex; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.gap-8 { gap: 32px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.mb-10 { margin-bottom: 40px; }
.mb-12 { margin-bottom: 48px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-2); }
.w-full { width: 100%; }