/* telcogigs — design system + styles */
:root,
[data-theme='light'] {
  --font-display: 'Space Grotesk', 'Trebuchet MS', sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;

  /* Surfaces — warm off-white */
  --color-bg: #faf9f6;
  --color-surface: #ffffff;
  --color-surface-2: #f4f3ef;
  --color-surface-offset: #eef0f3;
  --color-divider: #e5e7eb;
  --color-border: #d8dbe0;

  /* Text */
  --color-text: #131a2b;
  --color-text-muted: #525a6b;
  --color-text-faint: #9aa0ac;
  --color-text-inverse: #ffffff;

  /* Primary — signal teal/cyan (trust + telecom) */
  --color-primary: #0e7490;
  --color-primary-hover: #0a5c72;
  --color-primary-active: #07475a;
  --color-primary-soft: #ecfeff;

  /* Accent — amber (earning energy) */
  --color-accent: #d97706;
  --color-accent-soft: #fef3c7;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(15,23,42,0.06);
  --shadow-md: 0 6px 20px rgba(15,23,42,0.08);
  --shadow-lg: 0 24px 60px rgba(15,23,42,0.12);
  --shadow-primary: 0 10px 30px rgba(14,116,144,0.30);

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-default: 1080px;
  --content-narrow: 640px;
}

[data-theme='dark'] {
  --color-bg: #0c1018;
  --color-surface: #131825;
  --color-surface-2: #171d2c;
  --color-surface-offset: #1b2233;
  --color-divider: #232c3f;
  --color-border: #2e3850;

  --color-text: #e6edf3;
  --color-text-muted: #9fb0c8;
  --color-text-faint: #5e6b82;
  --color-text-inverse: #0c1018;

  --color-primary: #22d3ee;
  --color-primary-hover: #5ee7f5;
  --color-primary-active: #99eff8;
  --color-primary-soft: #0c2a33;

  --color-accent: #fbbf24;
  --color-accent-soft: #2a230f;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.5);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.6);
  --shadow-primary: 0 10px 30px rgba(34,211,238,0.25);
}

/* ---- base ---- */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}
img,svg { display: block; max-width: 100%; }
h1,h2,h3 { font-family: var(--font-display); line-height: 1.1; font-weight: 700; text-wrap: balance; letter-spacing: -0.02em; }
p,li { max-width: 68ch; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
.skip { position: absolute; left: -9999px; top: 0; background: var(--color-primary); color: var(--color-text-inverse); padding: 8px 16px; z-index: 100; }
.skip:focus { left: 16px; top: 16px; }

.container { width: 100%; max-width: var(--content-default); margin: 0 auto; padding: 0 24px; }

/* ---- header ---- */
.header { position: sticky; top: 0; z-index: 50; background: color-mix(in oklab, var(--color-bg) 85%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color var(--transition), box-shadow var(--transition); }
.header.scrolled { border-color: var(--color-divider); box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.03em; color: var(--color-primary); }
.brand-mark { color: var(--color-primary); }
.nav { display: flex; gap: 24px; margin-left: auto; }
.nav a { font-size: 0.9rem; font-weight: 500; color: var(--color-text-muted); }
.nav a:hover { color: var(--color-text); }
.theme-toggle { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: var(--radius-full); color: var(--color-text-muted); border: 1px solid var(--color-border); background: var(--color-surface); cursor: pointer; transition: color var(--transition), border-color var(--transition); }
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* ---- buttons ---- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--font-body); font-weight: 600; font-size: 0.95rem; padding: 12px 22px; border-radius: var(--radius-full); border: 1px solid transparent; cursor: pointer; transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition); white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 9px 18px; font-size: 0.875rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); box-shadow: var(--shadow-primary); }
.btn-primary:hover { background: var(--color-primary-hover); color: var(--color-text-inverse); }
.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ---- hero ---- */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 72px); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-primary); margin-bottom: 18px; }
.hero-title { font-size: clamp(2.4rem, 1.2rem + 4vw, 4rem); letter-spacing: -0.035em; }
.hero-sub { margin-top: 22px; font-size: 1.125rem; color: var(--color-text-muted); max-width: 54ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 32px; margin-top: 44px; list-style: none; padding: 0; }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-family: var(--font-display); font-size: 1.75rem; color: var(--color-text); }
.hero-stats span { font-size: 0.825rem; color: var(--color-text-muted); }

/* hero visual: signal orb + phone */
.hero-visual { display: flex; justify-content: center; }
.signal-orb { position: relative; width: 320px; height: 360px; display: flex; align-items: center; justify-content: center; }
.wave { position: absolute; border: 2px solid var(--color-primary); border-radius: 50%; opacity: 0; animation: pulse 3.4s ease-out infinite; }
.wave.w1 { width: 200px; height: 200px; animation-delay: 0s; }
.wave.w2 { width: 280px; height: 280px; animation-delay: 1.1s; opacity: 0.5; }
.wave.w3 { width: 360px; height: 360px; animation-delay: 2.2s; opacity: 0.3; }
@keyframes pulse { 0% { transform: scale(0.6); opacity: 0.55; } 70% { opacity: 0; } 100% { transform: scale(1.1); opacity: 0; } }
.phone { position: relative; z-index: 2; width: 168px; height: 340px; background: var(--color-text); border-radius: 30px; padding: 12px; box-shadow: var(--shadow-lg); }
.phone-notch { width: 60px; height: 8px; background: var(--color-bg); opacity: 0.25; border-radius: var(--radius-full); margin: 4px auto 14px; }
.phone-screen { background: var(--color-surface-2); border-radius: 22px; height: calc(100% - 26px); padding: 18px 14px; display: flex; flex-direction: column; gap: 12px; }
.app-badge { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; color: var(--color-primary); }
.app-status { display: flex; align-items: center; gap: 8px; font-size: 0.78rem; color: var(--color-text-muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; }
.dot.pulse { animation: blink 1.6s ease-in-out infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
.app-rows { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.app-row { height: 10px; border-radius: var(--radius-sm); background: var(--color-surface-offset); }
.app-row:nth-child(2) { width: 70%; }
.app-row:nth-child(3) { width: 85%; }
.app-earning { margin-top: auto; font-size: 0.78rem; font-weight: 600; color: var(--color-accent); text-align: center; padding: 8px; background: var(--color-accent-soft); border-radius: var(--radius-sm); }

/* ---- trust bar ---- */
.trust { border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider); padding: 18px 0; }
.trust-inner { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; font-size: 0.85rem; color: var(--color-text-muted); font-weight: 500; }
.dot-sep { color: var(--color-text-faint); }

/* ---- sections ---- */
.section { padding: clamp(56px, 8vw, 104px) 0; }
.section-alt { background: var(--color-surface); border-block: 1px solid var(--color-divider); }
.section-title { font-size: clamp(1.7rem, 1rem + 2vw, 2.4rem); margin-bottom: 14px; }
.section-lede { color: var(--color-text-muted); font-size: 1.0625rem; max-width: 60ch; margin-bottom: 8px; }

/* steps */
.steps { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 44px; }
.step { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); padding: 28px; position: relative; transition: transform var(--transition), box-shadow var(--transition); }
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.step-num { font-family: var(--font-display); font-weight: 700; color: var(--color-primary); font-size: 0.95rem; }
.step h3 { font-size: 1.2rem; margin: 12px 0 10px; }
.step p { color: var(--color-text-muted); font-size: 0.95rem; }

/* why */
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.why-body { margin-top: 16px; color: var(--color-text-muted); }
.why-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 20px; }
.why-list li { display: flex; gap: 16px; align-items: flex-start; max-width: none; }
.why-icon { flex: none; display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: var(--radius-md); background: var(--color-primary-soft); color: var(--color-primary); font-family: var(--font-display); font-weight: 700; font-size: 1rem; }
.why-list h3 { font-size: 1.05rem; margin-bottom: 4px; }
.why-list p { color: var(--color-text-muted); font-size: 0.92rem; }

/* for-grid */
.for-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 44px; }
.for-card { padding: 28px; border-radius: var(--radius-lg); background: var(--color-surface-2); }
.for-card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--color-primary); }
.for-card p { color: var(--color-text-muted); font-size: 0.95rem; }

/* claim */
.claim-section { background: linear-gradient(in oklab, var(--color-surface), var(--color-surface-2)); }
.claim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.claim-bullets { list-style: none; padding: 0; margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.claim-bullets li { padding-left: 30px; position: relative; color: var(--color-text); font-weight: 500; }
.claim-bullets li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--color-primary); font-weight: 700; }
.claim-form { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow-md); }
.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field label { font-size: 0.85rem; font-weight: 600; color: var(--color-text); }
.field input, .field select { width: 100%; padding: 13px 15px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg); color: var(--color-text); font-size: 1rem; transition: border-color var(--transition), box-shadow var(--transition); }
.field input:focus, .field select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-soft); }
.form-micro { font-size: 0.75rem; color: var(--color-text-faint); margin-top: 14px; line-height: 1.5; }
.form-msg { margin-top: 14px; padding: 12px 16px; border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500; }
.form-msg.ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.form-msg.err { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
[data-theme='dark'] .form-msg.ok { background: #0a2a20; color: #6ee7b7; border-color: #134e3a; }
[data-theme='dark'] .form-msg.err { background: #2a1010; color: #fca5a5; border-color: #5c1d1d; }
#submit-btn[disabled] { opacity: 0.7; cursor: not-allowed; }

/* faq */
.faq { max-width: 760px; }
.faq-item { border-bottom: 1px solid var(--color-divider); }
.faq-item summary { list-style: none; cursor: pointer; padding: 22px 0; font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--color-primary); font-size: 1.4rem; transition: transform var(--transition); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding-bottom: 22px; color: var(--color-text-muted); }

/* footer */
.footer { border-top: 1px solid var(--color-divider); padding: 48px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; flex-wrap: wrap; }
.footer-brand .brand { font-size: 1.1rem; }
.footer-brand p { color: var(--color-text-muted); font-size: 0.9rem; margin-top: 8px; }
.footer-fine { font-size: 0.78rem; color: var(--color-text-faint); max-width: 36ch; text-align: right; }

/* ---- responsive ---- */
@media (max-width: 880px) {
  .nav { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .signal-orb { width: 260px; height: 300px; }
  .why-grid, .claim-grid { grid-template-columns: 1fr; gap: 36px; }
  .steps, .for-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { gap: 12px; }
  .header .btn-sm { display: none; }
  .field-row { grid-template-columns: 1fr; }
  .footer-fine { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}