/*
Theme Name: M23T
Theme URI: https://m23t.com
Author: M23T
Description: M23T engineering studio theme — warm paper/ink, signal vermilion accent, hairline-led "instrument panel" aesthetic. Ported from the M23T Design System (designs/M23T Design System).
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: m23t
*/

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

/* ===================== TOKENS ===================== */
:root {
  --paper-0:   #FCFBF7;
  --paper-50:  #F6F3EC;
  --paper-100: #EFEBE1;
  --paper-200: #E6E1D4;

  --ink-900: #16140E;
  --ink-800: #26231A;
  --ink-700: #3A362A;
  --ink-600: #524D3E;
  --ink-500: #6E6857;
  --ink-400: #908A77;
  --ink-300: #B4AE9C;
  --ink-200: #D2CCBC;
  --ink-100: #E3DECF;

  --signal-700: #B5350F;
  --signal-600: #D2410F;
  --signal-500: #E5481C;
  --signal-400: #F06A40;
  --signal-100: #FBE3DA;
  --signal-50:  #FCEFE9;

  --terminal-900: #14130E;
  --terminal-800: #1E1C15;
  --terminal-700: #2B2820;
  --terminal-fg:  #EDEAE0;
  --terminal-dim: #9A9686;

  --success-500: #3E7A4E;
  --success-100: #DDEADD;
  --warning-500: #B5841E;
  --warning-100: #F2E7C6;
  --danger-500:  #B23A2A;
  --danger-100:  #F1DAD4;
  --info-500:    #3A5A7A;
  --info-100:    #D9E2EC;

  --bg-page:        var(--paper-50);
  --surface-card:   var(--paper-0);
  --surface-sunken: var(--paper-100);
  --surface-inset:  var(--paper-100);
  --surface-inverse: var(--terminal-900);

  --text-strong:   var(--ink-900);
  --text-body:     var(--ink-800);
  --text-muted:    var(--ink-500);
  --text-faint:    var(--ink-400);
  --text-on-accent: var(--paper-0);
  --text-on-inverse: var(--terminal-fg);
  --text-link:     var(--signal-600);

  --border-hairline: var(--ink-200);
  --border-strong:   var(--ink-300);
  --border-faint:    var(--paper-200);
  --border-inverse:  var(--terminal-700);

  --accent:        var(--signal-500);
  --accent-hover:  var(--signal-600);
  --accent-press:  var(--signal-700);
  --accent-tint:   var(--signal-50);
  --accent-tint-strong: var(--signal-100);

  --focus-ring: var(--signal-500);

  --font-display: "Space Grotesk", "Space Grotesk Fallback", system-ui, sans-serif;
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  --text-2xs: 0.6875rem;
  --text-xs:  0.75rem;
  --text-sm:  0.875rem;
  --text-base: 1rem;
  --text-md:  1.125rem;
  --text-lg:  1.375rem;
  --text-xl:  1.75rem;
  --text-2xl: 2.25rem;
  --text-3xl: 3rem;
  --text-4xl: 3.875rem;
  --text-5xl: 5rem;

  --leading-tight: 1.05;
  --leading-snug: 1.2;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;

  --tracking-tight: -0.02em;
  --tracking-snug: -0.01em;
  --tracking-normal: 0;
  --tracking-label: 0.08em;
  --tracking-wide: 0.14em;

  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  --container-max: 1200px;
  --container-narrow: 760px;
  --gutter: var(--space-5);
  --gutter-lg: var(--space-8);

  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 14px;
  --radius-pill: 999px;

  --shadow-xs: 0 1px 2px rgba(22, 20, 14, 0.05);
  --shadow-sm: 0 1px 2px rgba(22, 20, 14, 0.06), 0 2px 6px rgba(22, 20, 14, 0.04);
  --shadow-md: 0 2px 4px rgba(22, 20, 14, 0.06), 0 8px 20px rgba(22, 20, 14, 0.06);
  --shadow-lg: 0 4px 10px rgba(22, 20, 14, 0.07), 0 18px 40px rgba(22, 20, 14, 0.09);
  --shadow-focus: 0 0 0 3px rgba(229, 72, 28, 0.28);

  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 120ms;
  --duration-base: 180ms;
}

[data-theme="dark"] {
  --terminal-900: #201E17;
  --terminal-800: #2A2820;
  --terminal-700: #3A3628;
  --terminal-fg:  #EFECE2;
  --terminal-dim: #9C977F;

  --signal-50:  #241710;
  --signal-100: #3C2417;
  --signal-700: #F2A488;

  --bg-page:        #100F0A;
  --surface-card:   #1A1813;
  --surface-sunken: #15140E;
  --surface-inset:  #15140E;
  --surface-inverse: #1A1813;

  --text-strong: #F2EFE6;
  --text-body:   #D8D4C7;
  --text-muted:  #9E9A87;
  --text-faint:  #74705F;
  --text-link:   #F06A40;

  --border-hairline: #2D2A21;
  --border-strong:   #423E31;
  --border-faint:    #201E17;
  --border-inverse:  #3A3628;

  --accent-hover: var(--signal-400);
  --accent-press: var(--signal-500);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.35), 0 2px 6px rgba(0,0,0,0.3);
  --shadow-md: 0 2px 4px rgba(0,0,0,0.40), 0 8px 24px rgba(0,0,0,0.45);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.45), 0 20px 48px rgba(0,0,0,0.55);
}

/* ===================== BASE ===================== */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-body);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-strong);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-snug);
  margin: 0;
}

p { margin: 0; }
a { color: var(--text-link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.15em; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.9em; }
::selection { background: var(--accent); color: var(--text-on-accent); }
img { max-width: 100%; display: block; }

/* ===================== LAYOUT ===================== */
.m23-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.m23-container--narrow { max-width: var(--container-narrow); }

.m23-section { padding: var(--space-9) 0; }
.m23-section--tight { padding-top: var(--space-7); }
.m23-section__head {
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--space-5);
  margin-bottom: var(--space-7);
}
.m23-section__head--nodivider { border-top: none; padding-top: 0; }
.m23-section__intro {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-2xl);
  color: var(--text-strong);
  letter-spacing: -0.01em;
  line-height: 1.15;
  max-width: 20ch;
  margin-top: 18px;
}

.m23-grid { display: grid; gap: var(--space-5); }
.m23-grid--2 { grid-template-columns: repeat(2, 1fr); }
.m23-grid--3 { grid-template-columns: repeat(3, 1fr); }
.m23-grid--auto { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
@media (max-width: 760px) {
  .m23-grid--2, .m23-grid--3 { grid-template-columns: 1fr; }
}

/* ===================== KICKER ===================== */
.m23-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.m23-kicker__index { color: var(--accent); }

/* ===================== LOGO ===================== */
.m23-logo { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; }
.m23-logo svg { display: block; flex: none; }
.m23-logo__word {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  line-height: 1;
  display: inline-flex;
  align-items: center;
}
.m23-logo--inverse .m23-logo__word { color: var(--terminal-fg); }
.m23-logo__cursor {
  display: inline-block;
  width: 4px;
  height: 15px;
  background: var(--accent);
  margin-left: 2px;
  border-radius: 1px;
  transform: translateY(2%);
}

/* ===================== NAV ===================== */
.m23-nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg-page) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-hairline);
}
.m23-nav__row {
  max-width: var(--container-max); margin: 0 auto;
  padding: 0 var(--space-6); height: 68px;
  display: flex; align-items: center; justify-content: space-between;
}
.m23-nav__links { display: flex; align-items: center; gap: 4px; }
.m23-nav__toggle { display: none; }
.m23-nav__link {
  font-family: var(--font-mono); font-size: var(--text-sm);
  letter-spacing: 0.02em; color: var(--text-muted);
  padding: 8px 14px; border-radius: var(--radius-sm);
  text-decoration: none; background: transparent;
}
.m23-nav__link:hover { text-decoration: none; color: var(--text-strong); }
.m23-nav__link--active { color: var(--text-strong); background: var(--surface-sunken); }
.m23-nav__spacer { width: 12px; }

/* ===================== BUTTON ===================== */
.m23-btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 500; letter-spacing: 0.01em;
  border-radius: var(--radius-sm); cursor: pointer;
  transition: background-color 120ms var(--ease-standard), border-color 120ms var(--ease-standard), color 120ms var(--ease-standard), transform 120ms var(--ease-standard);
  white-space: nowrap; text-decoration: none; border: 1px solid transparent;
  gap: 8px; padding: 10px 18px; font-size: var(--text-sm); min-height: 40px;
}
.m23-btn:hover { text-decoration: none; }
.m23-btn:active { transform: translateY(0.5px); }
.m23-btn--sm { padding: 7px 12px; font-size: var(--text-sm); min-height: 32px; gap: 7px; }
.m23-btn--lg { padding: 13px 24px; font-size: var(--text-base); min-height: 48px; gap: 10px; }
.m23-btn--primary { background: var(--accent); color: var(--text-on-accent); border-color: var(--accent); }
.m23-btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.m23-btn--secondary { background: var(--surface-card); color: var(--text-strong); border-color: var(--border-strong); }
.m23-btn--secondary:hover { border-color: var(--ink-900); }
.m23-btn--ghost { background: transparent; color: var(--text-strong); border-color: transparent; }
.m23-btn--ghost:hover { background: var(--surface-sunken); }
.m23-btn--inverse { background: var(--terminal-fg); color: var(--ink-900); border-color: var(--terminal-fg); }
.m23-btn--block { width: 100%; }
.m23-btn[disabled] { cursor: not-allowed; opacity: 0.45; }

.m23-icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  cursor: pointer; border: 1px solid transparent; background: transparent;
  transition: background-color 120ms var(--ease-standard), border-color 120ms var(--ease-standard);
  color: var(--text-body);
}
.m23-icon-btn--sm { width: 32px; height: 32px; }
.m23-icon-btn--secondary { background: var(--surface-card); border-color: var(--border-strong); color: var(--text-strong); }
.m23-icon-btn--secondary:hover { border-color: var(--ink-900); }
.m23-icon-btn--ghost:hover { background: var(--surface-sunken); }
.m23-icon-btn svg { width: 17px; height: 17px; }

/* ===================== CARD ===================== */
.m23-card {
  position: relative; border-radius: var(--radius-lg); padding: var(--space-6);
  transition: border-color 160ms var(--ease-standard), box-shadow 160ms var(--ease-standard);
  background: var(--surface-card); border: 1px solid var(--border-hairline);
}
.m23-card--raised { border-color: var(--border-faint); box-shadow: var(--shadow-md); }
.m23-card--sunken { background: var(--surface-sunken); border-color: var(--border-faint); }
.m23-card--inverse { background: var(--terminal-900); border-color: var(--border-inverse); color: var(--terminal-fg); }
.m23-card--interactive { cursor: pointer; }
.m23-card--interactive:hover { border-color: var(--ink-900); }
.m23-card--inverse.m23-card--interactive:hover { border-color: var(--terminal-dim); }
.m23-card--pad-7 { padding: var(--space-7); }
.m23-card--pad-8 { padding: var(--space-8); }
.m23-card--dashed { border-style: dashed; border-color: var(--border-strong); }

.m23-crosshair { position: relative; }
.m23-crosshair::before, .m23-crosshair::after {
  content: ""; position: absolute; width: 8px; height: 8px;
  border-color: var(--border-strong); border-style: solid; pointer-events: none;
}
.m23-card--inverse.m23-crosshair::before, .m23-card--inverse.m23-crosshair::after { border-color: var(--terminal-700); }
.m23-crosshair::before { top: -1px; left: -1px; border-width: 1px 0 0 1px; }
.m23-crosshair::after { bottom: -1px; right: -1px; border-width: 0 1px 1px 0; }

/* ===================== BADGE / TAG ===================== */
.m23-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: var(--text-2xs); font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 3px 8px; border-radius: var(--radius-sm); line-height: 1.4; white-space: nowrap;
  background: var(--surface-sunken); color: var(--text-body); border: 1px solid var(--border-hairline);
}
.m23-badge--accent { background: var(--signal-50); color: var(--signal-700); border-color: var(--signal-100); }
.m23-badge--success { background: var(--success-100); color: var(--success-500); border-color: transparent; }
.m23-badge--outline { background: transparent; color: var(--text-muted); border-color: var(--border-strong); }
.m23-badge__dot { width: 6px; height: 6px; border-radius: 999px; background: currentColor; flex: none; }

.m23-tag {
  display: inline-flex; align-items: center; font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--text-muted); padding: 4px 9px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-hairline); background: var(--surface-card); line-height: 1.3; white-space: nowrap;
}

/* ===================== AVATAR ===================== */
.m23-avatar {
  width: 56px; height: 56px; border-radius: var(--radius-md); overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--terminal-900); color: var(--terminal-fg); border: 1px solid var(--border-hairline); flex: none;
  font-family: var(--font-mono); font-weight: 500; font-size: 20px; letter-spacing: 0.02em;
}
.m23-avatar--lg { width: 64px; height: 64px; font-size: 23px; }
.m23-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ===================== FORM ===================== */
.m23-field { display: flex; flex-direction: column; gap: 6px; }
.m23-field__label {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-muted);
}
.m23-input, .m23-textarea {
  font-family: var(--font-sans); font-size: var(--text-base); color: var(--text-strong);
  background: var(--surface-card); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  padding: 10px 12px; width: 100%; outline: none;
  transition: border-color 120ms var(--ease-standard), box-shadow 120ms var(--ease-standard);
}
.m23-input:focus, .m23-textarea:focus { border-color: var(--accent); box-shadow: var(--shadow-focus); }
.m23-textarea { resize: vertical; line-height: var(--leading-normal); }
.m23-input--inverse, .m23-textarea--inverse { background: var(--terminal-800); border-color: var(--terminal-700); color: var(--terminal-fg); }

/* ===================== HERO ===================== */
.m23-hero { position: relative; overflow: hidden; }
.m23-hero__grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--border-faint) 1px, transparent 1px), linear-gradient(90deg, var(--border-faint) 1px, transparent 1px);
  background-size: 64px 64px; opacity: 0.55;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 80%);
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 80%);
}
.m23-hero__inner { position: relative; padding: var(--space-10) var(--space-6) var(--space-9); }
.m23-hero__title {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: 1.02; letter-spacing: -0.025em; color: var(--text-strong); margin: 0; max-width: 16ch;
}
.m23-hero__title .m23-accent-word { color: var(--accent); }
.m23-hero__lead { font-size: var(--text-md); color: var(--text-body); line-height: 1.6; margin-top: 26px; max-width: 52ch; }
.m23-hero__actions { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.m23-hero__meta { display: flex; gap: 10px; margin-top: 40px; flex-wrap: wrap; align-items: center; }
.m23-hero__meta-text { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--text-faint); }

/* ===================== TERMINAL BLOCK ===================== */
.m23-terminal { font-family: var(--font-mono); font-size: var(--text-sm); line-height: 1.9; }
.m23-terminal__dim { color: var(--terminal-dim); }
.m23-terminal__signal { color: var(--signal-400); }
.m23-terminal__cursor { display: inline-block; width: 9px; height: 17px; background: var(--signal-400); transform: translateY(3px); border-radius: 1px; }

/* ===================== FOOTER ===================== */
.m23-footer { background: var(--terminal-900); color: var(--terminal-fg); margin-top: var(--space-10); }
.m23-footer__inner { max-width: var(--container-max); margin: 0 auto; padding: var(--space-8) var(--space-6) var(--space-6); }
.m23-footer__top { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.m23-footer__blurb { max-width: 320px; margin-top: 16px; color: var(--terminal-dim); font-size: var(--text-sm); line-height: 1.6; }
.m23-footer__cols { display: flex; gap: 64px; flex-wrap: wrap; }
.m23-footer__col-head { font-family: var(--font-mono); font-size: var(--text-2xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--terminal-dim); margin-bottom: 14px; }
.m23-footer__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.m23-footer__list a { color: var(--terminal-fg); font-size: var(--text-sm); }
.m23-footer__bottom { margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid var(--terminal-700); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-family: var(--font-mono); font-size: var(--text-xs); color: var(--terminal-dim); }

/* ===================== PAGE-LEVEL ===================== */
.m23-page-title {
  font-family: var(--font-display); font-weight: 600; font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  letter-spacing: -0.025em; line-height: 1.05; color: var(--text-strong); margin: 0; max-width: 18ch;
}
.m23-page-lead { font-size: var(--text-md); color: var(--text-body); line-height: 1.6; margin-top: 22px; max-width: 56ch; }

@media (max-width: 700px) {
  .m23-nav__toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: var(--radius-sm);
    background: transparent; border: 1px solid transparent; color: var(--text-strong);
    cursor: pointer; order: 3;
  }
  .m23-nav__toggle svg { width: 20px; height: 20px; }
  .m23-nav__row { flex-wrap: wrap; }
  .m23-nav__links {
    order: 4; flex: 1 0 100%;
    display: none; flex-direction: column; align-items: stretch; gap: 2px;
    padding: var(--space-4) 0 var(--space-5);
    border-top: 1px solid var(--border-hairline);
  }
  .m23-nav__links.is-open { display: flex; }
  .m23-nav__links .m23-nav__link { padding: 12px 4px; }
  .m23-nav__links .m23-nav__spacer { display: none; }
  .m23-nav__links .m23-icon-btn,
  .m23-nav__links .m23-btn { width: 100%; margin-top: 6px; }
  .m23-footer__top, .m23-footer__cols { gap: 28px; }
}