/* ============================================================
   Middle Management — Design System
   style.css — M1
   Built: 2026-03-04
   ============================================================ */

/* ------------------------------------------------------------
   Google Fonts
   ------------------------------------------------------------ */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&family=Inter:wght@400;500&family=DM+Mono:wght@400;500&display=swap');

/* ------------------------------------------------------------
   CSS Custom Properties — Shared Tokens
   ------------------------------------------------------------ */
:root {
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius-sm:    4px;
  --radius-md:    8px;
  --radius-lg:    12px;

  --space-xs:     4px;
  --space-sm:     8px;
  --space-md:     16px;
  --space-lg:     24px;
  --space-xl:     40px;
  --space-2xl:    64px;
  --space-3xl:    96px;

  --max-width:    1100px;
  --nav-height:   64px;

  --transition:   150ms ease;
}

/* ------------------------------------------------------------
   Colour System — Light Mode (default)
   ------------------------------------------------------------ */
:root {
  --color-bg:         #F8F9FB;
  --color-surface:    #FFFFFF;
  --color-border:     #E5E7EB;
  --color-text:       #0D1B2A;
  --color-accent:     #F97316;
  --color-supporting: #1C3A5E;
  --color-muted:      #6B7A99;
}

/* ------------------------------------------------------------
   Colour System — Dark Mode
   ------------------------------------------------------------ */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:         #09090B;
    --color-surface:    #18181B;
    --color-border:     #27272A;
    --color-text:       #FAFAFA;
    --color-accent:     #F97316;
    --color-supporting: #14B8A6;
    --color-muted:      #71717A;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  opacity: 0.75;
}

/* ------------------------------------------------------------
   Typography Scale
   ------------------------------------------------------------ */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-text);
  line-height: 1.15;
}

h1 {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -1px;
}

h2 {
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 600;
  letter-spacing: -0.5px;
}

h3 {
  font-size: 20px;
  font-weight: 600;
}

h4 {
  font-size: 16px;
  font-weight: 600;
}

p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
}

.text-muted {
  color: var(--color-muted);
}

.text-small {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-muted);
}

code, .mono {
  font-family: var(--font-mono);
  font-size: 14px;
}

/* ------------------------------------------------------------
   Layout Utilities
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* ------------------------------------------------------------
   Logo Mark
   ------------------------------------------------------------ */
.logo-mark {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0;
  white-space: nowrap;
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark .prompt {
  color: var(--color-muted);
  margin-right: 2px;
}

.logo-mark .wordmark {
  color: var(--color-text);
}

.logo-mark .cursor {
  color: var(--color-accent);
  animation: blink 1s step-end infinite;
  display: inline-block;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Nav cursor is static — blink is distracting on scroll */
.nav .logo-mark .cursor {
  animation: none;
}

@media print {
  .logo-mark .cursor {
    animation: none;
  }
}

/* ------------------------------------------------------------
   Navigation
   ------------------------------------------------------------ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav .container {
  height: 100%;
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-text);
  opacity: 1;
}

/* ------------------------------------------------------------
   Hero Section
   ------------------------------------------------------------ */
.hero {
  padding: var(--space-3xl) 0;
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
}

.hero-logo-mark {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 400;
  line-height: 1;
  margin-bottom: var(--space-2xl);
}

.hero-logo-mark .prompt {
  color: var(--color-muted);
}

.hero-logo-mark .wordmark {
  color: var(--color-text);
}

.hero-logo-mark .cursor {
  color: var(--color-accent);
  animation: blink 1s step-end infinite;
  display: inline-block;
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  max-width: 640px;
}

.hero-subtext {
  font-size: 18px;
  color: var(--color-muted);
  max-width: 480px;
}

/* ------------------------------------------------------------
   Section Headers
   ------------------------------------------------------------ */
.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-heading {
  margin-bottom: var(--space-xl);
}

.section-heading h2 {
  margin-bottom: var(--space-sm);
}

.section-heading p {
  color: var(--color-muted);
  max-width: 560px;
}

/* ------------------------------------------------------------
   Capability Cards
   ------------------------------------------------------------ */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.capability-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.capability-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.capability-desc {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   Steps (How It Works)
   ------------------------------------------------------------ */
.steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  max-width: 640px;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
  width: 32px;
  padding-top: 2px;
}

.step-content h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.step-content p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ------------------------------------------------------------
   Why Section
   ------------------------------------------------------------ */
.why-content {
  max-width: 640px;
}

.why-body {
  font-size: 17px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-top: var(--space-lg);
}

.why-body:first-child {
  margin-top: 0;
}

.why-closing {
  font-weight: 500;
  color: var(--color-text);
}

/* ------------------------------------------------------------
   Prompt Block (CTA)
   ------------------------------------------------------------ */
.prompt-block {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  overflow-x: auto;
}

.prompt-block code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-word;
}

.prompt-block-lg {
  padding: var(--space-xl);
}

.prompt-block-lg code {
  font-size: 15px;
  line-height: 1.6;
}

.hero-cta {
  margin-top: var(--space-xl);
}

.hero-cta-label {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.cta-section {
  text-align: center;
}

.cta-section .section-heading {
  margin-bottom: var(--space-lg);
}

.cta-content {
  max-width: 720px;
  margin: 0 auto;
}

.cta-subtext {
  margin-top: var(--space-lg);
  font-size: 16px;
  color: var(--color-muted);
}

/* ------------------------------------------------------------
   Contact Section
   ------------------------------------------------------------ */
.contact-content {
  max-width: 480px;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
  padding-bottom: 2px;
}

.contact-email:hover {
  border-color: var(--color-accent);
  opacity: 1;
}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-tagline {
  font-size: 13px;
  color: var(--color-muted);
  font-style: italic;
}

.footer-copy {
  font-size: 12px;
  color: var(--color-muted);
}

/* ------------------------------------------------------------
   Responsive — Mobile First, breakpoint at 768px
   ------------------------------------------------------------ */
@media (max-width: 767px) {
  :root {
    --space-3xl: 64px;
  }

  .nav-links {
    gap: var(--space-lg);
  }

  .hero {
    min-height: auto;
    padding: var(--space-2xl) 0;
  }

  .capabilities-grid {
    grid-template-columns: 1fr;
  }

  .step {
    gap: var(--space-md);
  }

  .cta-section {
    text-align: left;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
}

@media (min-width: 768px) {
  .capabilities-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}