/* ============================================================
   Ram Sharan Singh — Personal Site
   Design System: Minimalist editorial, calm authority
   Customize: CSS variables in :root for colors/fonts
   ============================================================ */

/* --- Google Fonts import --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* --- Design Tokens --- */
:root {
  /* Color palette */
  --bg:          #F9F8F5;      /* warm off-white canvas */
  --bg-alt:      #F1EFE9;      /* alternating section background */
  --surface:     #FFFFFF;
  --text-primary: #1A1918;     /* warm near-black */
  --text-secondary: #5A5855;   /* warm mid-gray */
  --text-muted:  #8A8884;      /* light gray labels */
  --accent:      #1D4E7A;      /* deep slate blue — authority, calm */
  --accent-hover: #163A5A;
  --accent-light: #EAF1F8;
  --border:      #E2E0DC;
  --nav-bg:      #1A1918;      /* dark nav */
  --nav-text:    #F0EFEB;

  /* Typography */
  --font-serif:  'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --space-xs:   0.375rem;
  --space-sm:   0.75rem;
  --space-md:   1.25rem;
  --space-lg:   2rem;
  --space-xl:   3.5rem;
  --space-2xl:  6rem;

  /* Layout */
  --container:  1100px;
  --prose:      680px;

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

  /* Radius */
  --radius:     4px;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
h4 { font-size: 1.1rem; font-family: var(--font-sans); font-weight: 600; }

p { margin-bottom: 1.25em; }
p:last-child { margin-bottom: 0; }

strong { font-weight: 600; }
em { font-style: italic; }

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

.prose {
  max-width: var(--prose);
}

.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background: var(--bg-alt);
}

/* --- Eyebrow Labels --- */
.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.75rem;
}

/* --- Navigation --- */
.nav {
  background: var(--nav-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--nav-text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-brand:hover { color: #fff; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: rgba(240,239,235,0.7);
  letter-spacing: 0.02em;
  transition: color var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active { color: #fff; }

/* Hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-2xl) 0;
  padding-top: calc(var(--space-2xl) + 1rem);
}

/* Two-column hero layout: text left, photo right */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content {
  min-width: 0;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.hero-eyebrow::after {
  content: '';
  flex: 1;
  max-width: 60px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  max-width: 680px;
  margin-bottom: var(--space-lg);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-summary {
  max-width: 560px;
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-xl);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

/* Photo frame */
.hero-photo-wrap {
  flex-shrink: 0;
}

.hero-photo-frame {
  position: relative;
  width: 300px;
}

/* Decorative offset border behind the photo */
.hero-photo-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid var(--accent);
  border-radius: 6px;
  transform: translate(10px, 10px);
  opacity: 0.25;
  z-index: 0;
}

.hero-photo {
  position: relative;
  z-index: 1;
  width: 300px;
  height: 370px;
  object-fit: cover;
  object-position: center top;
  border-radius: 6px;
  display: block;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 0;
  font-weight: 600;
  font-size: 0.85rem;
  gap: 0.3rem;
}

.btn-ghost::after {
  content: '→';
  transition: transform var(--transition);
}

.btn-ghost:hover::after { transform: translateX(3px); }

/* --- Credibility Bar --- */
.credibility {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.credibility-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.credibility-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xl);
}

.credibility-logos span {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.credibility-logos span:hover { opacity: 1; }

/* --- Highlight Grid (Home 3-column) --- */
.highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.highlight-card {
  padding: var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.highlight-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(29,78,122,0.07);
}

.highlight-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}

.highlight-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0;
}

/* --- Section Header --- */
.section-header {
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  margin-bottom: 0.75rem;
}

.section-header p {
  max-width: 560px;
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
}

/* --- Principle Blocks (How I Work) --- */
.principle {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
}

.principle:last-child { border-bottom: 1px solid var(--border); }

.principle-label {
  padding-top: 0.3rem;
}

.principle-label .number {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 400;
  color: var(--border);
  line-height: 1;
  margin-bottom: 0.5rem;
  display: block;
}

.principle-label h3 {
  font-size: 1.15rem;
  line-height: 1.3;
}

.principle-body p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* --- Optimize Table --- */
.optimize-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.optimize-col {
  padding: var(--space-lg);
  border-radius: var(--radius);
}

.optimize-col.for {
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
}

.optimize-col.avoid {
  background: var(--bg-alt);
  border-left: 3px solid var(--border);
}

.optimize-col h4 {
  margin-bottom: var(--space-md);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.optimize-col li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.optimize-col li:last-child { border-bottom: none; }

.optimize-col.for li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.optimize-col.avoid li::before {
  content: '×';
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* --- Case Studies (Experience) --- */
.case {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
}

.case:first-of-type { border-top: none; padding-top: 0; }

.case-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem var(--space-md);
  margin-bottom: var(--space-md);
}

.case-company {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.case-tenure {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.case h3 {
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  margin-bottom: var(--space-md);
  line-height: 1.25;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background: var(--bg-alt);
  border-radius: var(--radius);
}

.case-dimension h4 {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.case-dimension p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

.case-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.case-lesson {
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--accent);
  background: var(--accent-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

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

.writing-card {
  padding: var(--space-lg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.writing-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(29,78,122,0.07);
  transform: translateY(-2px);
}

.writing-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  border-left: 3px solid var(--accent);
}

.writing-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.writing-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.writing-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-md);
  flex: 1;
}

.writing-stub {
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.writing-stub-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.writing-stub-note {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Innovation Items --- */
.innovation-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.innovation-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.innovation-item:first-child { border-top: none; padding-top: 0; }

.innovation-year {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--border);
  line-height: 1;
  padding-top: 0.25rem;
}

.innovation-type {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.innovation-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.innovation-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 0;
}

/* --- Now Page --- */
.now-section {
  max-width: 640px;
}

.now-item {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border);
}

.now-item:last-child { border-bottom: none; }

.now-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.now-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* --- Contact --- */
.contact-body {
  max-width: 580px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  font-size: 0.95rem;
  color: var(--text-primary);
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 2px 12px rgba(29,78,122,0.07);
}

.contact-link-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.2rem;
}

.contact-link-value {
  font-weight: 500;
}

/* --- Contact Form --- */
.contact-social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.contact-social-link:hover { color: var(--accent); }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.form-required {
  color: var(--accent);
  margin-left: 1px;
}

.form-input {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-primary);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 0.9rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

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

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29,78,122,0.1);
}

.form-input.input-error {
  border-color: #c0392b;
  box-shadow: 0 0 0 3px rgba(192,57,43,0.08);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238A8884' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.2rem;
  cursor: pointer;
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.form-error {
  font-size: 0.78rem;
  color: #c0392b;
  min-height: 1rem;
  display: block;
}

.form-submit {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  font-size: 0.88rem;
  margin-top: 0.25rem;
}

.form-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Success banner */
.form-success {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: #eaf7f0;
  border: 1.5px solid #27ae60;
  border-radius: var(--radius);
  color: #1e7a45;
}

.form-success svg { flex-shrink: 0; margin-top: 2px; }

.form-success strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.form-success p {
  font-size: 0.88rem;
  margin: 0;
  color: #2d6a47;
}

/* Error banner */
.form-error-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: var(--space-md) var(--space-lg);
  background: #fdf0ee;
  border: 1.5px solid #e74c3c;
  border-radius: var(--radius);
  color: #c0392b;
  font-size: 0.88rem;
}

/* Responsive form */
@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .form-submit { width: 100%; justify-content: center; }
}

/* --- Essay / Prose page --- */
.essay-header {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-xl);
}

.essay-header h1 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  max-width: 720px;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.essay-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.essay-body {
  max-width: var(--prose);
  font-size: 1.0625rem;
  line-height: 1.85;
}

.essay-body h2 {
  font-size: 1.5rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.essay-body p { margin-bottom: 1.4em; }

.essay-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border);
  margin-top: var(--space-2xl);
  font-size: 0.85rem;
}

/* --- Footer --- */
.footer {
  background: var(--nav-bg);
  color: rgba(240,239,235,0.5);
  padding: var(--space-xl) 0;
  margin-top: var(--space-2xl);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-brand {
  font-family: var(--font-serif);
  color: rgba(240,239,235,0.8);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: 0.8rem;
  color: rgba(240,239,235,0.4);
  transition: color var(--transition);
}

.footer-links a:hover { color: rgba(240,239,235,0.9); }

.footer-copy {
  font-size: 0.75rem;
  width: 100%;
  text-align: right;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  :root { --space-2xl: 4rem; }

  /* Hero: stack photo above text on tablet */
  .hero-layout {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .hero-photo-wrap {
    order: -1;         /* photo moves above text */
    display: flex;
    justify-content: center;
  }

  .hero-photo-frame { width: 220px; }
  .hero-photo { width: 220px; height: 270px; }

  .highlights { grid-template-columns: 1fr; }
  .principle {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .principle-label .number { font-size: 2rem; }

  .optimize-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr 1fr; }

  .writing-grid { grid-template-columns: 1fr; }
  .writing-card.featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .innovation-item {
    grid-template-columns: 80px 1fr;
    gap: var(--space-lg);
  }

  .footer-copy { text-align: left; }
}

@media (max-width: 640px) {
  :root { --space-2xl: 3rem; }

  .nav-links { display: none; flex-direction: column; gap: var(--space-md); }
  .nav-links.open { display: flex; }
  .nav-inner { flex-wrap: wrap; height: auto; padding-top: 0.75rem; padding-bottom: 0.75rem; }
  .nav-toggle { display: flex; }

  /* Mobile nav open state */
  .nav-inner.open .nav-links {
    display: flex;
    width: 100%;
    padding: var(--space-md) 0 var(--space-sm);
    border-top: 1px solid rgba(255,255,255,0.08);
  }

  .case-grid { grid-template-columns: 1fr; }
  .innovation-item { grid-template-columns: 1fr; gap: var(--space-sm); }
  .innovation-year { font-size: 1.5rem; }

  .hero-photo-frame { width: 180px; }
  .hero-photo { width: 180px; height: 220px; }
  .hero-ctas { flex-direction: column; align-items: flex-start; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
}

/* --- Utility classes --- */
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent); }
.mt-xl { margin-top: var(--space-xl); }
.mb-xl { margin-bottom: var(--space-xl); }
.divider { border: none; border-top: 1px solid var(--border); margin: var(--space-xl) 0; }

/* Contact grid */
@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-xl) !important;
  }
}

/* --- Print --- */
@media print {
  .nav, .footer { display: none; }
  .section { padding: 1.5rem 0; }
}