/* ============================================================
    Tema Ocean Blue — Layout Sidebar
   ============================================================ */
:root {
  --bg-0: #050a18;
  --bg-1: #081226;
  --glass: rgba(16, 28, 56, 0.55);
  --glass-border: rgba(90, 160, 255, 0.18);
  --text: #e6f1ff;
  --text-dim: #8fa3c8;
  --neon-1: #38bdf8;
  --neon-2: #6366f1;
  --neon-3: #2dd4bf;
  --ok: #2ee6a6;
  --warn: #ff5a78;
  --radius: 16px;
  --sidebar-w: 250px;
  --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(900px 600px at 100% -8%, rgba(56, 189, 248, 0.14), transparent 60%),
    radial-gradient(800px 600px at -5% 30%, rgba(99, 102, 241, 0.16), transparent 55%),
    radial-gradient(700px 500px at 60% 120%, rgba(45, 212, 191, 0.10), transparent 60%),
    linear-gradient(160deg, var(--bg-1), var(--bg-0));
  background-attachment: fixed;
}

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

/* ---------- Sidebar (pengganti navbar atas) ---------- */
.nav {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 26px 18px;
  background: rgba(6, 10, 24, 0.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-right: 1px solid var(--glass-border);
  overflow-y: auto;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.3px;
}
.brand .logo {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
  color: #06061a;
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.45);
}
.brand b {
  background: linear-gradient(90deg, var(--neon-1), var(--neon-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1.3;
  display: block;
  font-size: 0.88rem;
}

.nav-links { display: flex; flex-direction: column; gap: 4px; }
.nav-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 11px;
  font-size: 0.88rem;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  transition: all 0.18s ease;
}
.nav-links a .badge {
  width: 24px; height: 24px;
  display: grid; place-items: center;
  border-radius: 7px;
  font-size: 0.72rem; font-weight: 700;
  background: rgba(90, 160, 255, 0.14);
  color: var(--neon-1);
  flex-shrink: 0;
}
.nav-links a:hover {
  color: var(--text);
  background: rgba(90, 160, 255, 0.08);
}
.nav-links a.active {
  color: var(--text); font-weight: 600;
  background: rgba(56, 189, 248, 0.12);
  border-left: 3px solid var(--neon-1);
}
.nav-links a.active .badge {
  background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
  color: #06061a;
}

/* ---------- Layout utama ---------- */
.container {
  max-width: 760px;
  margin: 0 0 0 var(--sidebar-w);
  padding: 48px 36px 80px;
}

.page-head {
  margin-bottom: 26px;
  padding-left: 18px;
  border-left: 3px solid var(--neon-1);
}
.page-head .eyebrow {
  display: inline-block;
  font-size: 0.7rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--neon-3); margin-bottom: 8px;
}
.page-head h1 { margin: 0 0 8px; font-size: 1.9rem; line-height: 1.15; }
.page-head h1 span {
  background: linear-gradient(90deg, var(--neon-1), var(--neon-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-head p { margin: 0; color: var(--text-dim); max-width: 60ch; }

/* ---------- Card (glass) ---------- */
.card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

/* ---------- Mode toggle ---------- */
.toggle {
  display: flex;
  padding: 4px;
  gap: 4px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  margin-bottom: 20px;
}
.toggle button {
  flex: 1;
  border: 0; cursor: pointer;
  padding: 10px 18px;
  border-radius: 9px;
  font-family: var(--font); font-size: 0.88rem; font-weight: 600;
  color: var(--text-dim);
  background: transparent;
  transition: all 0.18s ease;
}
.toggle button.active {
  color: #06061a;
  background: linear-gradient(90deg, var(--neon-1), var(--neon-3));
}

/* ---------- Form ---------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.8rem; color: var(--text-dim);
  margin-bottom: 6px; font-weight: 500; }
.grid { display: grid; gap: 14px; }
.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: 0.92rem;
  color: var(--text);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 11px 13px;
  outline: none;
  transition: border 0.18s, box-shadow 0.18s;
}
textarea { resize: vertical; min-height: 90px; font-family: var(--mono); }
input:focus, textarea:focus, select:focus {
  border-color: var(--neon-1);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.14);
}
select { appearance: none; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--neon-1) 50%),
    linear-gradient(135deg, var(--neon-1) 50%, transparent 50%);
  background-position: calc(100% - 18px) center, calc(100% - 13px) center;
  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
}
.matrix-grid { display: grid; gap: 10px; max-width: 320px; }
.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: 0.92rem;
  color: #06061a;
  padding: 12px 24px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--neon-1), var(--neon-2));
  box-shadow: 0 6px 18px rgba(45, 130, 230, 0.3);
  transition: transform 0.12s, box-shadow 0.18s, filter 0.18s;
}
.btn:hover { transform: translateY(-2px); filter: brightness(1.08); }
.btn:active { transform: translateY(0); }

/* ---------- Result ---------- */
.result-head { display: flex; align-items: center; justify-content: space-between;
  margin: 22px 0 10px; }
.result-head span { font-size: 0.8rem; color: var(--text-dim); }
.btn-copy {
  border: 1px solid var(--glass-border); cursor: pointer;
  background: rgba(90, 160, 255, 0.1); color: var(--neon-1);
  font-family: var(--font); font-size: 0.78rem; font-weight: 600;
  padding: 6px 13px; border-radius: 8px; transition: all 0.15s;
}
.btn-copy:hover { background: rgba(90, 160, 255, 0.22); }
.result {
  min-height: 56px;
  padding: 15px;
  border-radius: 10px;
  font-family: var(--mono); font-size: 0.92rem; line-height: 1.5;
  word-break: break-word; white-space: pre-wrap;
  color: var(--neon-1);
  background: rgba(0, 0, 0, 0.38);
  border-left: 3px solid var(--neon-1);
  border-top: 1px solid var(--glass-border);
  border-right: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}
.result.placeholder { color: var(--text-dim); font-family: var(--font); border-left-color: var(--glass-border); }
.result.error { color: var(--warn); border-left-color: var(--warn); font-family: var(--font); }
.meta { margin-top: 12px; font-size: 0.78rem; color: var(--text-dim);
  font-family: var(--mono); }
.meta b { color: var(--neon-2); }

/* ---------- Landing: hero + daftar tool ---------- */
.hero {
  text-align: left;
  padding: 10px 0 6px;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 30px;
  padding-bottom: 24px;
}
.hero h1 { font-size: 2rem; margin: 0; line-height: 1.25; }
.hero h1 span {
  background: linear-gradient(90deg, var(--neon-1), var(--neon-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { color: var(--text-dim); max-width: 56ch; margin: 10px 0 0; }

.cards { display: flex; flex-direction: column; gap: 12px; margin-top: 0; }
.cipher-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  transition: transform 0.16s, border 0.16s, background 0.16s;
}
.cipher-card:hover {
  transform: translateX(6px);
  border-color: var(--neon-1);
  background: rgba(56, 189, 248, 0.06);
}
.cipher-card .ico {
  width: 42px; height: 42px; border-radius: 11px;
  display: grid; place-items: center; font-weight: 800; font-size: 1.1rem;
  color: #06061a; flex-shrink: 0;
  background: linear-gradient(135deg, var(--neon-1), var(--neon-2));
}
.cipher-card .body { flex: 1; min-width: 0; }
.cipher-card h3 { margin: 0 0 3px; font-size: 1rem; }
.cipher-card p { margin: 0; font-size: 0.82rem; color: var(--text-dim); }
.cipher-card .go { font-size: 1.1rem; color: var(--neon-1); flex-shrink: 0; }

/* ---------- Footer ---------- */
.foot {
  margin-left: var(--sidebar-w);
  text-align: left; padding: 20px 36px 50px; color: var(--text-dim);
  font-size: 0.8rem;
}
.foot b { color: var(--text); }

/* ---------- Rincian langkah ---------- */
.steps {
  margin-top: 22px;
  display: none;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.03);
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.step {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--mono);
  font-size: 0.86rem;
}
.step:first-child { border-top: none; }
.step .num { color: rgba(255, 255, 255, 0.8) !important; text-align: left;
  font-size: 0.78rem; font-weight: 700; }
.step .formula { color: #ffffff !important; word-break: break-word; }
.step .char { color: var(--neon-1) !important; font-weight: 800;
  justify-self: end; font-size: 1rem; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  :root { --sidebar-w: 0px; }
  .nav {
    position: sticky;
    width: 100%; height: auto;
    flex-direction: row;
    align-items: center;
    border-right: none;
    border-bottom: 1px solid var(--glass-border);
    overflow-x: auto;
    padding: 12px 16px;
  }
  .brand { flex-direction: row; align-items: center; margin-right: 12px; }
  .brand span.full { display: none; }
  .nav-links { flex-direction: row; }
  .nav-links a { border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; }
  .nav-links a.active { border-left: none; border-bottom: 3px solid var(--neon-1); }
  .container { margin-left: 0; padding: 30px 18px 60px; }
  .foot { margin-left: 0; padding: 20px 18px 50px; }
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
  .page-head h1 { font-size: 1.5rem; }
  .hero h1 { font-size: 1.6rem; }
}