/* ============================================================
   main.css — Shared styles, design tokens, reset, typography
   Industrial aesthetic: steel, concrete, precision
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap');

/* ------------------------------------------------------------
   Design Tokens
   ------------------------------------------------------------ */
:root {
  /* Color palette */
  --color-void:        #0f0f0f;
  --color-base:        #1a1a1a;
  --color-surface:     #222222;
  --color-steel:       #2e2e2e;
  --color-border:      #333333;
  --color-border-light:#444444;
  --color-muted:       #666666;
  --color-secondary:   #999999;
  --color-text:        #e8e8e8;
  --color-white:       #f5f5f5;

  /* Accent — hazard yellow / signal orange */
  --color-accent:      #f0b429;
  --color-accent-dim:  #c8941f;
  --color-danger:      #e8541e;
  --color-danger-dim:  #c44418;

  /* Typography */
  --font-mono:   'IBM Plex Mono', 'JetBrains Mono', 'Courier New', monospace;
  --font-body:   'Inter', system-ui, -apple-system, sans-serif;

  /* Type scale — tighter, more refined */
  --text-xs:    0.6875rem;  /* 11px */
  --text-sm:    0.75rem;    /* 12px */
  --text-base:  0.875rem;   /* 14px */
  --text-md:    1rem;       /* 16px */
  --text-lg:    1.125rem;   /* 18px */
  --text-xl:    1.25rem;    /* 20px */
  --text-2xl:   1.5rem;     /* 24px */
  --text-3xl:   1.875rem;   /* 30px — pulled back from 32px for better density */

  /* Spacing scale (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Borders */
  --border:       1px solid var(--color-border);
  --border-light: 1px solid var(--color-border-light);
  --border-accent: 1px solid var(--color-accent);

  /* Radius — minimal, industrial */
  --radius-sm: 2px;
  --radius:    3px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition:      200ms ease;

  /* Sidebar dimensions */
  --sidebar-width: 240px;
  --content-max-width: 1680px;
}

/* ------------------------------------------------------------
   Reset
   ------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: clamp(15px, 0.25vw + 14px, 17px);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Prevent tiny-screen zoom jarring */
  text-size-adjust: 100%;
}

body {
  background-color: var(--color-void);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Prevent content overflow on narrow viewports */
  overflow-x: hidden;
}

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

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

hr {
  border: none;
  border-top: var(--border);
  margin: var(--space-6) 0;
}

/* ------------------------------------------------------------
   Typography utilities
   ------------------------------------------------------------ */
.font-mono  { font-family: var(--font-mono); }
.font-body  { font-family: var(--font-body); }

.text-xs    { font-size: var(--text-xs); }
.text-sm    { font-size: var(--text-sm); }
.text-base  { font-size: var(--text-base); }
.text-md    { font-size: var(--text-md); }
.text-lg    { font-size: var(--text-lg); }
.text-xl    { font-size: var(--text-xl); }

.text-muted     { color: var(--color-muted); }
.text-secondary { color: var(--color-secondary); }
.text-accent    { color: var(--color-accent); }
.text-danger    { color: var(--color-danger); }
.text-white     { color: var(--color-white); }

.uppercase     { text-transform: uppercase; }
.tracked       { letter-spacing: 0.08em; }
.tracked-wide  { letter-spacing: 0.14em; }
.tracked-tight { letter-spacing: -0.02em; }

.weight-400 { font-weight: 400; }
.weight-500 { font-weight: 500; }
.weight-600 { font-weight: 600; }
.weight-700 { font-weight: 700; }

/* Industrial label — the standard label style across all pages */
.label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  margin-bottom: var(--space-2);
}

/* ------------------------------------------------------------
   Form elements
   ------------------------------------------------------------ */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.input {
  width: 100%;
  background: var(--color-void);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.input::placeholder {
  color: var(--color-muted);
  opacity: 0.6;
}

.input:hover {
  border-color: var(--color-border-light);
}

.input:focus {
  border-color: var(--color-accent);
  background: #111111;
}

.input.input--error {
  border-color: var(--color-danger);
}

/* ------------------------------------------------------------
   Buttons
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0 var(--space-5);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
  white-space: nowrap;
  min-height: 40px;
  line-height: 1;
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-void);
}

.btn--primary:hover {
  background: var(--color-accent-dim);
  border-color: var(--color-accent-dim);
}

.btn--primary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-secondary);
}

.btn--ghost:hover {
  border-color: var(--color-border-light);
  color: var(--color-text);
}

.btn--danger {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-muted);
}

.btn--danger:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.btn--full { width: 100%; }

/* ------------------------------------------------------------
   Status / badge
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid;
}

.badge--active {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(240, 180, 41, 0.08);
}

.badge--idle {
  color: var(--color-muted);
  border-color: var(--color-border);
  background: transparent;
}

.badge--alert {
  color: var(--color-danger);
  border-color: var(--color-danger);
  background: rgba(232, 84, 30, 0.08);
}

/* ------------------------------------------------------------
   Divider with text
   ------------------------------------------------------------ */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ------------------------------------------------------------
   Scrollbar (Webkit)
   ------------------------------------------------------------ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-base);
}

::-webkit-scrollbar-thumb {
  background: var(--color-steel);
  border-radius: 0;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-light);
}

/* ------------------------------------------------------------
   Focus visible (global)
   ------------------------------------------------------------ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}