/* ==========================================================================
   Camera Storage Calculator — Design System
   Palette: deep navy-black base, phosphor "REC" red signature accent,
   teal signal accent for data. Type: Outfit (display) + Inter (body).
   ========================================================================== */

:root{
  --bg-deep:#0b1220;
  --bg-panel:#111a2e;
  --bg-panel-2:#0e1626;
  --bg-elevated:#16213a;
  --border-soft: rgba(148,163,196,0.16);
  --border-strong: rgba(148,163,196,0.28);
  --text-primary:#e8ecf6;
  --text-muted:#93a1bd;
  --text-faint:#6b7793;
  --accent-rec:#ff5a5a;
  --accent-rec-dim: rgba(255,90,90,0.16);
  --accent-signal:#12d6a8;
  --accent-signal-dim: rgba(18,214,168,0.14);
  --accent-signal-strong:#0bbd93;
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.45);
  --shadow-sm: 0 6px 20px rgba(0,0,0,0.28);
  --radius-md: 14px;
  --radius-lg: 22px;
  --font-display:'Outfit', system-ui, sans-serif;
  --font-body:'Inter', system-ui, sans-serif;
}

[data-theme="light"]{
  --bg-deep:#f4f6fb;
  --bg-panel:#ffffff;
  --bg-panel-2:#eef1f8;
  --bg-elevated:#ffffff;
  --border-soft: rgba(20,30,60,0.08);
  --border-strong: rgba(20,30,60,0.14);
  --text-primary:#131b2e;
  --text-muted:#525f7f;
  --text-faint:#8891a8;
  --accent-rec-dim: rgba(255,90,90,0.12);
  --accent-signal-dim: rgba(18,214,168,0.12);
  --shadow-lg: 0 20px 50px rgba(20,30,60,0.10);
  --shadow-sm: 0 6px 18px rgba(20,30,60,0.08);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-primary);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background .25s ease, color .25s ease;
}

h1,h2,h3,h4{ font-family:var(--font-display); font-weight:700; line-height:1.15; margin:0 0 .5em; letter-spacing:-0.01em; }
h2{ font-size:clamp(1.6rem,3vw,2.2rem); }
h3{ font-size:1.05rem; }
p{ margin:0 0 1em; color:var(--text-muted); }
a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; cursor:pointer; }

.skip-link{ position:absolute; left:-999px; top:0; background:var(--accent-signal); color:#03211a; padding:.6em 1em; z-index:999; border-radius:0 0 8px 0; }
.skip-link:focus{ left:0; }

:focus-visible{ outline:2px solid var(--accent-signal); outline-offset:2px; }

.section-inner{ max-width:1180px; margin:0 auto; padding:0 24px; }

/* ---------------- Header ---------------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:color-mix(in srgb, var(--bg-deep) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border-soft);
}
.header-inner{
  max-width:1180px; margin:0 auto; padding:14px 24px;
  display:flex; align-items:center; gap:24px;
}
.logo{ display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:700; font-size:1.05rem; margin-right:auto; }
.logo-mark{
  display:inline-flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:10px;
  background:linear-gradient(155deg, var(--accent-signal), #0a7d63);
  color:#04231b; font-weight:800; font-size:.85rem; letter-spacing:-1px;
}
.logo-mark i{ font-style:normal; color:var(--accent-rec); }
.logo-text{ white-space:nowrap; }

.main-nav ul{ list-style:none; display:flex; gap:6px; margin:0; padding:0; align-items:center; }
.main-nav > ul > li > a, .nav-toggle{
  display:flex; align-items:center; gap:6px;
  background:none; border:none; color:var(--text-primary);
  font-size:.92rem; font-weight:500; padding:10px 14px; border-radius:10px;
  transition:background .2s;
}
.main-nav > ul > li > a:hover, .nav-toggle:hover{ background:var(--bg-elevated); }
.chev{ width:14px; height:14px; fill:none; stroke:currentColor; stroke-width:2.4; transition:transform .2s; }
.has-mega{ position:relative; }
.has-mega[data-open="true"] .chev{ transform:rotate(180deg); }

.mega-panel{
  position:absolute; top:100%; right:0;
  display:none; gap:32px;
  background:var(--bg-elevated); border:1px solid var(--border-soft);
  border-radius:var(--radius-md); box-shadow:var(--shadow-lg);
  padding:22px 26px; min-width:520px; margin-top:8px;
}
.has-mega[data-open="true"] .mega-panel{ display:flex; }
.mega-col{ display:flex; flex-direction:column; gap:4px; min-width:220px; }
.mega-col h3{ font-size:.72rem; text-transform:uppercase; letter-spacing:.08em; color:var(--text-faint); margin-bottom:8px; }
.mega-col a{ padding:8px 10px; border-radius:8px; color:var(--text-muted); font-size:.92rem; }
.mega-col a:hover{ background:var(--bg-panel-2); color:var(--text-primary); }
.mega-col a.current{ color:var(--accent-signal); font-weight:600; }

.header-actions{ display:flex; align-items:center; gap:8px; }
.theme-toggle{
  width:40px; height:40px; border-radius:10px; border:1px solid var(--border-soft);
  background:var(--bg-panel-2); color:var(--text-primary); display:flex; align-items:center; justify-content:center;
}
.theme-toggle svg{ width:18px; height:18px; fill:none; stroke:currentColor; stroke-width:2; }
.theme-toggle .icon-moon{ display:none; }
[data-theme="light"] .theme-toggle .icon-sun{ display:none; }
[data-theme="light"] .theme-toggle .icon-moon{ display:block; }

.hamburger{ display:none; width:40px; height:40px; border-radius:10px; border:1px solid var(--border-soft); background:var(--bg-panel-2); flex-direction:column; align-items:center; justify-content:center; gap:4px; }
.hamburger span{ width:18px; height:2px; background:var(--text-primary); border-radius:2px; transition:transform .2s, opacity .2s; }

.mobile-nav{ display:none; flex-direction:column; padding:10px 24px 18px; border-top:1px solid var(--border-soft); }
.mobile-nav a{ padding:12px 4px; border-bottom:1px solid var(--border-soft); font-size:.95rem; }
.mobile-nav details summary{ padding:12px 4px; cursor:pointer; border-bottom:1px solid var(--border-soft); font-weight:600; }
.mobile-nav details a{ padding-left:16px; border-bottom:none; font-weight:400; }
.mobile-nav.open{ display:flex; }

/* Cookie banner */
.cookie-banner{
  position:fixed; left:16px; right:16px; bottom:16px; z-index:200;
  background:var(--bg-elevated); border:1px solid var(--border-strong);
  border-radius:var(--radius-md); box-shadow:var(--shadow-lg);
  padding:16px 18px; display:flex; flex-wrap:wrap; align-items:center; gap:14px;
  max-width:760px; margin:0 auto;
  transform:translateY(140%); transition:transform .4s ease;
}
.cookie-banner.show{ transform:translateY(0); }
.cookie-banner p{ margin:0; font-size:.88rem; flex:1; min-width:220px; }
.cookie-actions{ display:flex; gap:8px; }

/* Breadcrumb */
.breadcrumb{ max-width:1180px; margin:0 auto; padding:14px 24px 0; }
.breadcrumb ol{ list-style:none; display:flex; flex-wrap:wrap; gap:6px; margin:0; padding:0; font-size:.82rem; color:var(--text-faint); }
.breadcrumb li:not(:last-child)::after{ content:'/'; margin-left:6px; color:var(--text-faint); }
.breadcrumb a:hover{ color:var(--accent-signal); }
.breadcrumb li[aria-current]{ color:var(--text-muted); }

/* ---------------- Buttons ---------------- */
.btn-primary, .btn-ghost{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 20px; border-radius:12px; font-weight:600; font-size:.92rem;
  border:1px solid transparent; transition:transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space:nowrap;
}
.btn-primary{ background:linear-gradient(135deg, var(--accent-signal), var(--accent-signal-strong)); color:#04231b; box-shadow:0 8px 24px rgba(18,214,168,0.25); }
.btn-primary:hover{ transform:translateY(-1px); box-shadow:0 12px 30px rgba(18,214,168,0.32); }
.btn-primary:disabled{ opacity:.6; cursor:not-allowed; transform:none; }
.btn-ghost{ background:transparent; border-color:var(--border-strong); color:var(--text-primary); }
.btn-ghost:hover{ background:var(--bg-elevated); }
.btn-lg{ padding:14px 28px; font-size:.98rem; }
.btn-primary svg, .btn-ghost svg{ width:16px; height:16px; fill:none; stroke:currentColor; stroke-width:2; }

.btn-spinner{ display:none; width:14px; height:14px; border-radius:50%; border:2px solid rgba(4,35,26,.3); border-top-color:#04231b; animation:spin .7s linear infinite; }
.btn-primary.loading .btn-spinner{ display:inline-block; }
.btn-primary.loading .btn-label{ opacity:.85; }
@keyframes spin{ to{ transform:rotate(360deg); } }

/* ---------------- Hero ---------------- */
.hero{ padding:56px 0 40px; }
.hero-inner{
  max-width:1180px; margin:0 auto; padding:0 24px;
  display:grid; grid-template-columns:1.1fr 0.9fr; gap:48px; align-items:center;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:.78rem; font-weight:600; letter-spacing:.04em; text-transform:uppercase;
  color:var(--accent-rec); background:var(--accent-rec-dim);
  padding:6px 12px; border-radius:999px; margin-bottom:16px;
}
.rec-dot{ width:8px; height:8px; border-radius:50%; background:var(--accent-rec); box-shadow:0 0 0 0 rgba(255,90,90,.5); animation:pulse-rec 1.6s infinite; }
.rec-dot.small{ width:7px; height:7px; }
@keyframes pulse-rec{
  0%{ box-shadow:0 0 0 0 rgba(255,90,90,.45); }
  70%{ box-shadow:0 0 0 8px rgba(255,90,90,0); }
  100%{ box-shadow:0 0 0 0 rgba(255,90,90,0); }
}
.hero h1{ font-size:clamp(2.2rem, 4.5vw, 3.4rem); margin-bottom:.35em; }
.hero-sub{ font-size:1.05rem; max-width:52ch; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:14px; margin:22px 0 20px; }
.hero-trust{ list-style:none; display:flex; flex-wrap:wrap; gap:16px; padding:0; margin:0; font-size:.82rem; color:var(--text-faint); }
.hero-trust li::before{ content:'✓ '; color:var(--accent-signal); font-weight:700; }

/* Signature: tape reel / timecode gauge */
.hero-signature{ display:flex; justify-content:center; }
.tape-reel{
  width:100%; max-width:380px; background:var(--bg-panel);
  border:1px solid var(--border-soft); border-radius:var(--radius-lg);
  padding:22px 22px 20px; box-shadow:var(--shadow-lg);
}
.reel-header{ display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; }
.reel-timecode{ font-family:'Outfit',monospace; font-size:1.4rem; font-weight:600; letter-spacing:.03em; color:var(--accent-signal); font-variant-numeric:tabular-nums; }
.reel-rec{ display:flex; align-items:center; gap:6px; font-size:.75rem; font-weight:700; letter-spacing:.06em; color:var(--accent-rec); }
.reel-track{ position:relative; height:14px; border-radius:8px; background:var(--bg-panel-2); overflow:hidden; border:1px solid var(--border-soft); }
.reel-fill{ position:absolute; inset:0; width:8%; background:linear-gradient(90deg, var(--accent-signal), var(--accent-rec)); border-radius:8px; transition:width 1.2s cubic-bezier(.4,0,.2,1); }
.reel-ticks{
  position:absolute; inset:0;
  background-image:repeating-linear-gradient(90deg, rgba(0,0,0,0.18) 0 1px, transparent 1px 5%);
}
.reel-footer{ display:flex; justify-content:space-between; margin-top:10px; font-size:.78rem; color:var(--text-faint); }

/* ---------------- Reference strip ---------------- */
.ref-strip{ padding:20px 0; border-top:1px solid var(--border-soft); border-bottom:1px solid var(--border-soft); background:var(--bg-panel-2); }
.ref-strip-inner{ max-width:1180px; margin:0 auto; padding:0 24px; }
.ref-strip-label{ font-size:.78rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-faint); margin-bottom:10px; }
.ref-strip-links{ display:flex; flex-wrap:wrap; gap:8px; }
.ref-strip-links a{
  font-size:.8rem; padding:7px 12px; border-radius:999px; border:1px solid var(--border-soft);
  color:var(--text-muted); background:var(--bg-panel);
}
.ref-strip-links a:hover{ color:var(--accent-signal); border-color:var(--accent-signal); }

/* ---------------- Calculator ---------------- */
.calculator-section{ padding:64px 0; }
.section-lead{ max-width:60ch; margin-bottom:32px; }
.calc-form{ background:var(--bg-panel); border:1px solid var(--border-soft); border-radius:var(--radius-lg); padding:32px; box-shadow:var(--shadow-sm); }
.calc-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:22px; }
.field{ display:flex; flex-direction:column; gap:6px; }
.field label{ font-size:.84rem; font-weight:600; color:var(--text-primary); }
.field input, .field select{
  background:var(--bg-panel-2); border:1px solid var(--border-strong); color:var(--text-primary);
  padding:11px 12px; border-radius:10px; font-size:.92rem; font-family:inherit;
  width:100%;
}
.field select{
  appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2393a1bd' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat; background-position:right 12px center; background-size:16px;
  padding-right:36px;
}
.field input:focus, .field select:focus{ border-color:var(--accent-signal); }
.field input.invalid{ border-color:var(--accent-rec); }
.field-error{ font-size:.76rem; color:var(--accent-rec); min-height:1em; }
.field-hint{ font-size:.74rem; color:var(--text-faint); }
.form-actions{ display:flex; gap:14px; margin-top:28px; flex-wrap:wrap; }

/* ---------------- Result ---------------- */
.result-section{ padding:20px 0 64px; scroll-margin-top:90px; }
.result-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-bottom:28px; }
.result-card{ background:var(--bg-panel); border:1px solid var(--border-soft); border-radius:var(--radius-md); padding:20px; display:flex; flex-direction:column; gap:6px; }
.result-card.highlight{ border-color:var(--accent-signal); background:linear-gradient(160deg, var(--accent-signal-dim), var(--bg-panel)); grid-column:span 3; }
.result-label{ font-size:.76rem; text-transform:uppercase; letter-spacing:.05em; color:var(--text-faint); }
.result-value{ font-family:var(--font-display); font-size:1.6rem; font-weight:700; color:var(--text-primary); }
.result-card.highlight .result-value{ font-size:2.4rem; color:var(--accent-signal); }
.result-sub{ font-size:.85rem; color:var(--text-muted); }

.result-breakdown{ background:var(--bg-panel); border:1px solid var(--border-soft); border-radius:var(--radius-md); padding:22px; margin-bottom:24px; }
.result-breakdown pre{ white-space:pre-wrap; word-break:break-word; font-family:'Inter',monospace; font-size:.85rem; color:var(--text-muted); margin:0; line-height:1.7; }

.result-actions{ display:flex; flex-wrap:wrap; gap:12px; }
.toast{ margin-top:12px; font-size:.85rem; color:var(--accent-signal); min-height:1em; }

/* ---------------- Features ---------------- */
.features-section{ padding:64px 0; background:var(--bg-panel-2); }
.features-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.feature-card{ background:var(--bg-panel); border:1px solid var(--border-soft); border-radius:var(--radius-md); padding:24px; }
.feature-icon{ font-size:1.6rem; margin-bottom:10px; }

/* ---------------- How it works ---------------- */
.how-section{ padding:64px 0; }
.how-steps{ list-style:none; margin:0; padding:0; display:grid; gap:22px; }
.how-steps li{ display:flex; gap:18px; align-items:flex-start; }
.step-num{
  flex:none; width:38px; height:38px; border-radius:10px; background:var(--bg-elevated);
  border:1px solid var(--border-soft); color:var(--accent-signal); font-family:var(--font-display); font-weight:700;
  display:flex; align-items:center; justify-content:center;
}

/* ---------------- Article ---------------- */
.article-section{ padding:20px 0 64px; }
.article-section .section-inner{ max-width:820px; }
.article-section p{ font-size:.98rem; }

/* ---------------- FAQ ---------------- */
.faq-section{ padding:64px 0; background:var(--bg-panel-2); }
.faq-list{ display:flex; flex-direction:column; gap:10px; }
.faq-item{ background:var(--bg-panel); border:1px solid var(--border-soft); border-radius:var(--radius-md); padding:6px 20px; }
.faq-item summary{ cursor:pointer; padding:14px 0; font-weight:600; font-size:.98rem; list-style:none; display:flex; justify-content:space-between; align-items:center; }
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{ content:'+'; font-size:1.2rem; color:var(--accent-signal); }
.faq-item[open] summary::after{ content:'−'; }
.faq-item p{ padding-bottom:16px; margin:0; }

/* ---------------- CTA ---------------- */
.cta-section{ padding:64px 0; }
.cta-inner{ text-align:center; background:linear-gradient(160deg, var(--bg-panel), var(--bg-panel-2)); border:1px solid var(--border-soft); border-radius:var(--radius-lg); padding:56px 32px; }
.cta-inner p{ max-width:50ch; margin-inline:auto; }
.cta-buttons{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-top:20px; }

/* ---------------- Footer ---------------- */
.site-footer{ background:var(--bg-panel-2); border-top:1px solid var(--border-soft); padding:48px 0 20px; }
.footer-inner{ max-width:1180px; margin:0 auto; padding:0 24px; display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; }
.footer-col h4{ font-size:.78rem; text-transform:uppercase; letter-spacing:.05em; color:var(--text-faint); margin-bottom:14px; }
.footer-col a{ display:block; font-size:.85rem; color:var(--text-muted); padding:5px 0; }
.footer-col a:hover{ color:var(--accent-signal); }
.footer-brand p{ font-size:.85rem; }
.footer-legal-links{ display:flex; gap:14px; flex-wrap:wrap; }
.footer-legal-links a{ display:inline; padding:0; font-size:.8rem; text-decoration:underline; text-underline-offset:3px; }
.footer-bottom{ max-width:1180px; margin:32px auto 0; padding:20px 24px 0; border-top:1px solid var(--border-soft); font-size:.76rem; color:var(--text-faint); }
.footer-bottom p{ color:var(--text-faint); font-size:.76rem; margin-bottom:.5em; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns:1fr; }
  .calc-grid{ grid-template-columns:repeat(2,1fr); }
  .features-grid{ grid-template-columns:repeat(2,1fr); }
  .result-grid{ grid-template-columns:repeat(2,1fr); }
  .result-card.highlight{ grid-column:span 2; }
  .footer-inner{ grid-template-columns:1fr 1fr; }
}

@media (max-width: 720px){
  .main-nav{ display:none; }
  .hamburger{ display:flex; }
  .mobile-nav{ display:none; }
  .mobile-nav.open{ display:flex; }
  .calc-grid{ grid-template-columns:1fr; }
  .features-grid{ grid-template-columns:1fr; }
  .result-grid{ grid-template-columns:1fr; }
  .result-card.highlight{ grid-column:span 1; }
  .footer-inner{ grid-template-columns:1fr; }
  .hero{ padding:36px 0 28px; }
  .calculator-section, .features-section, .how-section, .faq-section, .cta-section{ padding:44px 0; }
  .calc-form{ padding:20px; }
  body{ overflow-x:hidden; }
}

@media (max-width: 400px){
  .header-inner{ padding:12px 16px; }
  .section-inner, .hero-inner, .ref-strip-inner, .breadcrumb, .footer-inner{ padding-left:16px; padding-right:16px; }
}