/* ============================================================
    Tema rose — ribbon tipis + nav di konten
   ============================================================ */
:root {
  --bg-0: #18161a;
  --bg-1: #1d1a1f;
  --surface: #221f25;
  --surface-border: rgba(212, 115, 138, 0.2);
  --text: #e6e0e2;
  --text-dim: #8d8488;
  --accent-1: #d4738a;
  --accent-2: #de8fa2;
  --accent-3: #e7b0bd;
  --warn: #cc5c5c;
  --radius: 14px;
  --font: 'Poppins', system-ui, -apple-system, Segoe UI, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(600px 400px at 20% 0%, rgba(212, 115, 138, 0.07), transparent 60%),
              linear-gradient(170deg, var(--bg-1), var(--bg-0));
}

a { color: inherit; text-decoration: none; }

/* ========================================
   Ribbon — thin top bar
   ======================================== */
.ribbon {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(24, 22, 26, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--surface-border);
}
.ribbon-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 920px;
  margin: 0 auto;
  padding: 6px 20px;
}
.ribbon-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.r-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700; font-size: 0.75rem;
  color: #18161a;
  background: var(--accent-1);
}
.r-name {
  font-size: 0.78rem; font-weight: 600;
  color: var(--accent-2);
  white-space: nowrap;
}
.r-npm {
  font-size: 0.62rem; color: var(--text-dim);
  font-family: var(--mono);
  margin-left: 4px;
}

/* ========================================
   Subnav — pills below page title
   ======================================== */
.subnav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.subnav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-dim);
  border: 1px solid var(--surface-border);
  transition: all 0.14s ease;
}
.subnav a:hover {
  color: var(--text);
  border-color: var(--accent-1);
  background: rgba(212, 115, 138, 0.06);
}
.subnav a.active {
  color: #18161a;
  font-weight: 600;
  background: var(--accent-1);
  border-color: var(--accent-1);
}
.subnav a .p-badge {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-size: 0.75rem;
  background: rgba(212, 115, 138, 0.12);
}
.subnav a.active .p-badge {
  background: rgba(0, 0, 0, 0.15);
  color: #18161a;
}

/* ========================================
   Container
   ======================================== */
.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 20px 20px 70px;
}

.page-head { margin-bottom: 12px; }
.page-head .eyebrow {
  display: inline-block;
  font-size: 0.68rem; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--accent-1); margin-bottom: 8px;
  padding: 3px 9px; border: 1px solid var(--surface-border); border-radius: 999px;
}
.page-head h1 { margin: 0 0 6px; font-size: 1.7rem; line-height: 1.15; }
.page-head h1 span {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-head p { margin: 0; color: var(--text-dim); max-width: 56ch; font-size: 0.9rem; }

/* ========================================
   Card — shadow rounded, no border accent
   ======================================== */
.card {
  background: var(--surface);
  border: none;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

/* ---------- Stacked input / output ---------- */
.card-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.stack-input { min-width: 0; }
.stack-output {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--surface-border);
}
.stack-output .result { border-style: dashed; }

/* ---------- Mode toggle ---------- */
.toggle {
  display: inline-flex;
  padding: 3px;
  gap: 3px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--surface-border);
  margin-bottom: 14px;
}
.toggle button {
  border: 0; cursor: pointer;
  padding: 6px 16px;
  border-radius: 999px;
  font-family: var(--font); font-size: 0.82rem; font-weight: 600;
  color: var(--text-dim);
  background: transparent;
  transition: all 0.12s ease;
}
.toggle button.active {
  color: #18161a;
  background: var(--accent-1);
}

/* ---------- Form ---------- */
.field { margin-bottom: 12px; }
.field label {
  display: block; font-size: 0.76rem; color: var(--text-dim);
  margin-bottom: 5px; font-weight: 500;
}
.grid { display: grid; gap: 12px; }
.grid.cols-2 { grid-template-columns: 1fr 1fr; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

input, textarea, select {
  width: 100%;
  font-family: var(--font); font-size: 0.88rem;
  color: var(--text);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  padding: 10px 12px;
  outline: none;
  transition: border 0.12s;
}
textarea { resize: vertical; min-height: 80px; font-family: var(--mono); }
input:focus, textarea:focus, select:focus {
  border-color: var(--accent-1);
}
select {
  appearance: none; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--accent-1) 50%),
    linear-gradient(135deg, var(--accent-1) 50%, transparent 50%);
  background-position: calc(100% - 14px) center, calc(100% - 10px) center;
  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
}
.matrix-grid { display: grid; gap: 8px; max-width: 260px; }
.matrix-grid input { text-align: center; font-family: var(--mono); }

/* ---------- Button ---------- */
.btn {
  border: 0; cursor: pointer;
  font-family: var(--font); font-weight: 600; font-size: 0.85rem;
  color: #18161a;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--accent-1);
  box-shadow: 0 3px 12px rgba(212, 115, 138, 0.25);
  transition: transform 0.12s, box-shadow 0.12s, filter 0.12s;
}
.btn:hover {
  transform: translateY(-1px); filter: brightness(1.08);
  box-shadow: 0 6px 18px rgba(212, 115, 138, 0.35);
}
.btn:active { transform: translateY(0); }

/* ---------- Result ---------- */
.result-head {
  display: flex; align-items: center; justify-content: space-between;
  margin: 0 0 8px;
}
.result-head span { font-size: 0.76rem; color: var(--text-dim); }
.btn-copy {
  border: 1px solid var(--surface-border); cursor: pointer;
  background: rgba(212, 115, 138, 0.08); color: var(--accent-1);
  font-family: var(--font); font-size: 0.72rem; font-weight: 600;
  padding: 4px 12px; border-radius: 999px; transition: all 0.12s;
}
.btn-copy:hover { background: rgba(212, 115, 138, 0.18); }

.result {
  min-height: 50px;
  padding: 12px;
  border-radius: 8px;
  font-family: var(--mono); font-size: 0.88rem; line-height: 1.5;
  word-break: break-word; white-space: pre-wrap;
  color: var(--accent-1);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--surface-border);
}
.result.placeholder { color: var(--text-dim); font-family: var(--font); }
.result.error { color: var(--warn); border-color: rgba(204, 92, 92, 0.4); font-family: var(--font); }
.meta {
  margin-top: 10px; font-size: 0.74rem; color: var(--text-dim);
  font-family: var(--mono);
}
.meta b { color: var(--accent-1); }

/* ========================================
   Landing cards — horizontal layout
   ======================================== */
.hero { text-align: center; padding: 16px 0 4px; }
.hero h1 { font-size: 1.8rem; margin: 0 0 8px; }
.hero h1 span {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { color: var(--text-dim); max-width: 50ch; margin: 0 auto; font-size: 0.85rem; }

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 22px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cipher-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  transition: all 0.16s ease;
}
.cipher-card:hover {
  border-color: var(--accent-1);
  background: rgba(212, 115, 138, 0.04);
}
.cc-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-size: 1rem;
  color: #18161a;
  background: var(--accent-1);
  flex-shrink: 0;
}
.cc-body { min-width: 0; }
.cc-body h3 { margin: 0 0 2px; font-size: 0.88rem; font-weight: 600; }
.cc-body p { margin: 0; font-size: 0.72rem; color: var(--text-dim); line-height: 1.4; }

/* ========================================
   Steps
   ======================================== */
.steps {
  margin-top: 14px;
  display: none;
  flex-direction: column;
  background: rgba(0, 0, 0, 0.2);
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--surface-border);
}
.step {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 8px 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  font-family: var(--mono);
  font-size: 0.78rem;
}
.step:first-child { border-top: none; }
.step .num { color: var(--accent-1) !important; font-weight: 700; font-size: 0.72rem; }
.step .formula { color: #fff !important; word-break: break-word; }
.step .char { color: var(--accent-1) !important; font-weight: 800; justify-self: end; font-size: 0.85rem; }

/* ========================================
   Footer
   ======================================== */
.foot {
  text-align: center; padding: 24px 20px 40px;
  color: var(--text-dim); font-size: 0.72rem;
}
.foot b { color: var(--text); }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 640px) {
  .ribbon-inner { padding: 5px 12px; }
  .r-name { display: none; }
  .container { padding: 14px 12px 60px; }
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
  .page-head h1 { font-size: 1.3rem; }
  .hero h1 { font-size: 1.4rem; }
}