/* ============================================================
   FileSaver — style.css
   Tema: "loker penitipan digital". Titipkan file di satu pintu,
   ambil dari pintu manapun — selama kuncinya (akun) sama.
   ============================================================ */

:root {
  /* Warna */
  --ink: #0F1826;
  --ink-2: #1B2740;
  --ink-3: #29385A;
  --paper: #EEF1F4;
  --paper-dim: #DEE3E9;
  --paper-line: #C7CFD9;
  --text-on-paper: #16202E;
  --text-muted: #5B6B82;
  --text-on-ink: #E7EBF1;
  --text-on-ink-muted: #94A3BC;

  --brass: #C89B3C;
  --brass-light: #E4C878;
  --brass-dim: #8A6B28;

  --tone-success: #2F8F7A;
  --tone-success-bg: #E1F1EC;
  --tone-soon: #C9782E;
  --tone-soon-bg: #FAEBDB;
  --tone-danger: #C1503A;
  --tone-danger-bg: #F8E4DF;
  --tone-permanent: #3E5A8C;
  --tone-permanent-bg: #E3E9F4;

  /* Tipografi */
  --font-display: 'Space Grotesk', 'IBM Plex Sans', sans-serif;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  /* Layout */
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 1px 2px rgba(15, 24, 38, 0.06), 0 8px 24px rgba(15, 24, 38, 0.06);
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text-on-paper);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.1;
  margin: 0;
}

p { margin: 0; line-height: 1.6; color: var(--text-muted); }

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

.fs-muted { color: var(--text-muted); }

.fs-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.is-hidden { display: none !important; }

/* ── Tombol ─────────────────────────────────────────────────── */
.fs-btn {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 12px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.fs-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.fs-btn--brass {
  background: var(--brass);
  color: var(--ink);
}
.fs-btn--brass:hover:not(:disabled) { background: var(--brass-light); transform: translateY(-1px); }

.fs-btn--outline-on-ink {
  background: transparent;
  color: var(--text-on-ink);
  border-color: rgba(231, 235, 241, 0.35);
}
.fs-btn--outline-on-ink:hover:not(:disabled) { border-color: var(--brass-light); color: var(--brass-light); }

.fs-btn--ghost {
  background: transparent;
  border-color: var(--paper-line);
  color: var(--text-on-paper);
}
.fs-btn--ghost:hover:not(:disabled) { border-color: var(--brass-dim); color: var(--brass-dim); }

.fs-btn--danger-ghost {
  background: transparent;
  border-color: var(--paper-line);
  color: var(--tone-danger);
}
.fs-btn--danger-ghost:hover:not(:disabled) { border-color: var(--tone-danger); background: var(--tone-danger-bg); }

.fs-btn--block { width: 100%; }
.fs-btn--sm { padding: 8px 14px; font-size: 0.85rem; }

/* ── Navbar ─────────────────────────────────────────────────── */
.fs-nav {
  background: var(--ink);
  padding: 18px 0;
}
.fs-nav .fs-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.fs-nav__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-on-ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.fs-nav__brand span { color: var(--brass-light); }
.fs-nav__links { display: flex; gap: 12px; align-items: center; }

/* ── Hero ───────────────────────────────────────────────────── */
.fs-hero {
  background: var(--ink);
  color: var(--text-on-ink);
  padding: 64px 0 88px;
  position: relative;
  overflow: hidden;
}
.fs-hero .fs-container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.fs-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass-light);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
.fs-hero__eyebrow::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--tone-success);
  box-shadow: 0 0 0 3px rgba(47, 143, 122, 0.25);
}
.fs-hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.fs-hero h1 em {
  font-style: normal;
  color: var(--brass-light);
}
.fs-hero p.fs-hero__lead {
  color: var(--text-on-ink-muted);
  font-size: 1.05rem;
  max-width: 46ch;
  margin-bottom: 32px;
}
.fs-hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.fs-hero__note {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-on-ink-muted);
}

/* ── Signature: dinding loker ─────────────────────────────────── */
.locker-wall {
  --door-gap: 6px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--door-gap);
  background: var(--ink-2);
  border: 1px solid var(--ink-3);
  border-radius: var(--radius);
  padding: 14px;
}
.locker {
  aspect-ratio: 1 / 1.05;
  background: linear-gradient(155deg, var(--ink-3), var(--ink-2));
  border: 1px solid rgba(231, 235, 241, 0.08);
  border-radius: 4px;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 6px;
  overflow: hidden;
}
.locker::after {
  content: '';
  position: absolute;
  right: 5px; top: 8px; bottom: 8px;
  width: 1px;
  background: rgba(231, 235, 241, 0.08);
}
.locker__num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-on-ink-muted);
  letter-spacing: 0.03em;
}
.locker--open {
  background: linear-gradient(155deg, #2A3450, #1E2A44);
  border-color: var(--brass-dim);
  box-shadow: 0 0 0 1px rgba(200, 155, 60, 0.25), 0 0 26px rgba(200, 155, 60, 0.22);
}
.locker--open .locker__num { color: var(--brass-light); }
.locker--open .locker__slot {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.locker--open .locker__slot svg {
  width: 42%;
  color: var(--brass-light);
  filter: drop-shadow(0 0 8px rgba(228, 200, 120, 0.55));
  animation: fs-glow 2.6s ease-in-out infinite;
}
@keyframes fs-glow {
  0%, 100% { opacity: 0.85; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(-2px); }
}
@media (prefers-reduced-motion: reduce) {
  .locker--open .locker__slot svg { animation: none; }
}

/* ── Cara kerja ─────────────────────────────────────────────── */
.fs-section { padding: 76px 0; }
.fs-section__head { max-width: 60ch; margin-bottom: 44px; }
.fs-section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brass-dim);
  display: block;
  margin-bottom: 10px;
}
.fs-section__head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: 12px;
}

.fs-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.fs-step {
  background: #fff;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow-card);
}
.fs-step__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--brass-dim);
  border: 1px solid var(--paper-line);
  border-radius: 20px;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.fs-step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.fs-step p { font-size: 0.92rem; }

/* ── Fitur ──────────────────────────────────────────────────── */
.fs-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.fs-feature {
  background: #fff;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  padding: 22px;
}
.fs-feature__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--tone-permanent);
  background: var(--tone-permanent-bg);
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.fs-feature h3 { font-size: 0.98rem; margin-bottom: 6px; }
.fs-feature p { font-size: 0.88rem; }

/* ── CTA akhir ──────────────────────────────────────────────── */
.fs-final-cta {
  background: var(--ink);
  color: var(--text-on-ink);
  padding: 64px 0;
  text-align: center;
}
.fs-final-cta h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 12px; }
.fs-final-cta p { color: var(--text-on-ink-muted); margin-bottom: 26px; }

/* ── Footer ─────────────────────────────────────────────────── */
.fs-footer {
  background: var(--ink);
  border-top: 1px solid var(--ink-3);
  padding: 22px 0 32px;
}
.fs-footer .fs-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.fs-footer p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-on-ink-muted);
}

/* ── Toast ──────────────────────────────────────────────────── */
.fs-toast-host {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
  width: min(92vw, 420px);
}
.fs-toast {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  background: var(--ink-2);
  color: var(--text-on-ink);
  box-shadow: 0 10px 30px rgba(15, 24, 38, 0.35);
  border-left: 3px solid var(--brass);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.fs-toast.is-visible { opacity: 1; transform: translateY(0); }
.fs-toast--success { border-left-color: var(--tone-success); }
.fs-toast--error { border-left-color: var(--tone-danger); }

/* ── Responsif ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .fs-hero .fs-container { grid-template-columns: 1fr; }
  .fs-steps { grid-template-columns: 1fr; }
  .fs-features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .fs-nav__links span { display: none; }
  .fs-features { grid-template-columns: 1fr; }
  .fs-hero { padding: 44px 0 64px; }
  .fs-section { padding: 52px 0; }
}