/* OxyVault-inspired design */
:root {
  --bg-page: #020408;
  --bg-panel: #0a0d14;
  --bg-panel-soft: rgba(15, 23, 42, 0.3);
  --border-slate: rgba(30, 41, 59, 0.6);
  --border-slate-soft: rgba(30, 41, 59, 0.5);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #2563eb;
  --accent-hover: #3b82f6;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --indigo: #6366f1;
  --indigo-soft: rgba(99, 102, 241, 0.1);
  --success: #10b981;
  --success-soft: rgba(16, 185, 129, 0.1);
  --error: #ef4444;
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 1.875rem;
  --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-page);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* App shell */
.app-wrap { min-height: 100vh; padding: 1rem; }
@media (min-width: 768px) { .app-wrap { padding: 2rem; } }

.app-header {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  max-width: 72rem;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .app-header { flex-direction: row; justify-content: space-between; align-items: center; }
}

.logo-block {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: inherit;
}
.logo-block:hover { color: var(--text); }
.logo-icon {
  background: linear-gradient(135deg, var(--accent), var(--indigo));
  padding: 0.75rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.logo-icon-svg { width: 1.75rem; height: 1.75rem; color: white; fill: white; }
.logo-title {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  font-style: italic;
  margin: 0;
}
.logo-title-accent { color: var(--accent); }
.logo-badge {
  display: block;
  font-size: 0.5625rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 0.125rem;
}

.nav-pills {
  display: flex;
  background: var(--bg-panel);
  padding: 0.375rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-slate-soft);
  gap: 0;
  flex-wrap: wrap;
}
.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: 0.75rem;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  transition: all 0.2s;
}
.nav-pill-button {
  font-family: inherit;
  background: transparent;
  border: none;
  cursor: pointer;
}
.nav-pill:hover { color: var(--text-muted); }
.nav-pill-active { background: var(--accent); color: white; }
.nav-pill-active:hover { color: white; background: var(--accent-hover); }
.nav-pill-icon { width: 0.875rem; height: 0.875rem; }

.app-main {
  max-width: 72rem;
  margin-left: auto;
  margin-right: auto;
}

/* Panels (Oxy-style cards) */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}
@media (min-width: 768px) { .panel { padding: 2rem; } }

.panel-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.panel-icon {
  padding: 0.75rem;
  border-radius: var(--radius);
  background: var(--accent-soft);
}
.panel-icon svg { width: 1.5rem; height: 1.5rem; color: var(--accent); }
.panel-icon.indigo { background: var(--indigo-soft); }
.panel-icon.indigo svg { color: var(--indigo); }
.panel-title { font-size: 1.25rem; font-weight: 700; color: white; margin: 0; letter-spacing: -0.01em; }
.panel-desc { font-size: 0.75rem; color: var(--text-dim); margin: 0.25rem 0 0 0; }

/* Labels */
.label { display: block; font-size: 0.6875rem; font-weight: 800; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 0.5rem; }
.hint { font-size: 0.8125rem; color: var(--text-dim); margin-top: 0.35rem; }
.hint code { font-size: 0.75rem; padding: 0.15rem 0.4rem; background: var(--bg-panel-soft); border-radius: 4px; color: var(--text-muted); }

/* Form controls */
input[type="text"],
input[type="password"],
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-panel-soft);
  border: 1px solid var(--border-slate-soft);
  border-radius: 0.75rem;
  transition: border-color 0.2s;
}
input::placeholder, textarea::placeholder { color: var(--text-dim); }
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
textarea { resize: vertical; min-height: 72px; }

input[type="file"] {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 0.5rem 0;
}
input[type="file"]::file-selector-button {
  padding: 0.5rem 1rem;
  margin-right: 0.75rem;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-slate);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background 0.2s;
}
input[type="file"]::file-selector-button:hover { background: rgba(37, 99, 235, 0.2); }

/* Radio group */
.radio-group { display: flex; gap: 1rem; flex-wrap: wrap; }
.radio-option {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.radio-option:hover { color: var(--text); }
.radio-option input { width: auto; margin: 0; accent-color: var(--accent); }
.radio-option input:checked + span { color: var(--text); font-weight: 700; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  font-family: inherit;
  color: white;
  background: var(--accent);
  border: none;
  border-radius: 0.75rem;
  cursor: pointer;
  transition: background 0.2s;
}
.btn:hover:not(:disabled) { background: var(--accent-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-full { width: 100%; padding: 1rem; margin-top: 1.5rem; }
.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border-slate);
}
.btn-ghost:hover:not(:disabled) { background: var(--accent-soft); }
.btn-success { background: var(--success); }
.btn-success:hover:not(:disabled) { background: #059669; }

/* Upload zone (dashed drop area) */
.upload-zone {
  position: relative;
  border: 2px dashed var(--border-slate-soft);
  border-radius: var(--radius-xl);
  padding: 3rem 1.5rem;
  text-align: center;
  background: var(--bg-panel-soft);
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: rgba(37, 99, 235, 0.4);
  background: var(--accent-soft);
}
.upload-zone.dragover { border-style: solid; }
.upload-zone span { display: block; font-size: 0.9375rem; font-weight: 700; color: var(--text-muted); margin-bottom: 0.25rem; }
.upload-zone .upload-filename { color: var(--accent); }
.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.upload-zone input[type="file"]::file-selector-button { display: none; }
.upload-zone .upload-icon { width: 3rem; height: 3rem; color: var(--text-dim); margin: 0 auto 1rem; display: block; }

/* Result / success card */
.result-panel {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--success-soft);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.result-panel.indigo { background: var(--indigo-soft); border-color: rgba(99, 102, 241, 0.2); }
.result-panel pre {
  width: 100%;
  background: var(--bg-panel);
  padding: 1rem;
  border-radius: 0.75rem;
  overflow: auto;
  max-height: 320px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.8125rem;
  margin: 0 0 1rem 0;
  border: 1px solid var(--border-slate-soft);
}
.result-panel .binary-note { font-size: 0.875rem; color: var(--text-dim); margin-bottom: 1rem; }

/* Status */
.status { font-size: 0.875rem; margin-top: 0.75rem; font-weight: 600; }
.status.error { color: var(--error); }
.status.success { color: var(--success); }

/* Home hero */
.hero {
  text-align: center;
  padding: 2rem 0 2rem;
}
.hero h1 { font-size: 2rem; font-weight: 900; letter-spacing: -0.03em; margin: 0 0 0.5rem 0; color: white; }
.hero p { color: var(--text-muted); font-size: 1rem; margin: 0 0 2rem 0; max-width: 360px; margin-left: auto; margin-right: auto; }
.nav-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (min-width: 640px) { .nav-cards { grid-template-columns: repeat(3, 1fr); } }
.nav-card {
  display: block;
  padding: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border-slate);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: border-color 0.2s, transform 0.2s;
  box-shadow: var(--shadow);
  color: var(--text);
}
.nav-card:hover { border-color: var(--accent); transform: translateY(-2px); color: var(--text); }
.nav-card strong { display: block; font-size: 1rem; font-weight: 800; letter-spacing: 0.05em; margin-bottom: 0.25rem; }
.nav-card span { font-size: 0.75rem; color: var(--text-dim); }

/* Simple form layout helpers */
.form-stack {
  display: grid;
  gap: 1rem;
}
.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  cursor: pointer;
}
.checkbox-inline input[type="checkbox"] {
  accent-color: var(--accent);
}
.hint-link {
  font-size: 0.8125rem;
  color: var(--text-dim);
}
.hint-link:hover {
  color: var(--text-muted);
}

/* Keyring-style card (for keys page) */
.key-card {
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-slate);
  background: var(--bg-panel-soft);
  transition: all 0.2s;
  cursor: pointer;
}
.key-card.active { background: var(--accent-soft); border-color: rgba(37, 99, 235, 0.5); }
.key-card .key-label { font-size: 0.875rem; font-weight: 800; color: var(--text); }
.key-card.active .key-label { color: var(--accent); }
.key-card .key-id { font-size: 0.625rem; font-family: ui-monospace, monospace; color: var(--text-dim); text-transform: uppercase; margin-top: 0.25rem; }

/* Back link */
.back-link { margin-top: 2rem; }
.back-link .btn { padding: 0.5rem 1rem; font-size: 0.75rem; }