/* ============================================================
   IVOTRA — Main Stylesheet
   ============================================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-bg:          #090909;
  --color-surface:     #151515;
  --color-border:      #2A2A2A;
  --color-primary:     #C1121F;
  --color-accent:      #D72638;
  --color-text:        #F7F7F7;
  --color-muted:       #9D9D9D;
  --color-white:       #FFFFFF;

  --font-heading:      'Space Grotesk', system-ui, sans-serif;
  --font-body:         'Inter', system-ui, sans-serif;
  --font-mono:         'JetBrains Mono', monospace;

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

  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  --max-width:         1200px;
  --nav-height:        72px;

  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  80px;
  --space-10: 120px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }

p {
  color: var(--color-muted);
  line-height: 1.75;
}

code, pre {
  font-family: var(--font-mono);
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section {
  padding-block: var(--space-10);
}

.section--sm {
  padding-block: var(--space-8);
}

.section--lg {
  padding-block: 160px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.flex {
  display: flex;
}

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

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

/* --- Section Labels --- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-label::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--color-primary);
}

.section-heading {
  margin-bottom: var(--space-3);
}

.section-subheading {
  max-width: 560px;
  font-size: 1.0625rem;
  margin-bottom: var(--space-7);
}

/* --- Divider --- */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 11px 22px;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: rgba(193, 18, 31, 0.5);
  color: var(--color-text);
}

.btn-ghost {
  background: transparent;
  color: var(--color-muted);
  border: none;
  padding-inline: 0;
}

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

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(9, 9, 9, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

.nav__logo-mark svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: white;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  padding: 6px 14px;
  font-size: 0.9rem;
  font-weight: 450;
  color: var(--color-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  letter-spacing: -0.01em;
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
  background: rgba(255,255,255,0.04);
}

.nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
}

.nav__menu-btn span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.nav__menu-btn.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__menu-btn.open span:nth-child(2) {
  opacity: 0;
}
.nav__menu-btn.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav drawer */
.nav__drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  z-index: 99;
}

.nav__drawer.open {
  display: flex;
}

.nav__drawer .nav__link {
  padding: 10px 12px;
  font-size: 1rem;
}

/* --- Hero --- */
.hero {
  padding-top: calc(var(--nav-height) + var(--space-10));
  padding-bottom: var(--space-10);
  position: relative;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.hero__eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero__heading {
  font-size: clamp(3rem, 6.5vw, 5.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  max-width: 780px;
}

.hero__heading em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  line-height: 1.7;
  max-width: 560px;
  color: var(--color-muted);
  margin-bottom: var(--space-7);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  align-items: center;
  gap: var(--space-7);
  margin-top: var(--space-10);
  padding-top: var(--space-7);
  border-top: 1px solid var(--color-border);
}

.hero__stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.03em;
}

.hero__stat-label {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: 2px;
}

/* --- Pillars / Three Columns --- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.pillar {
  background: var(--color-bg);
  padding: var(--space-8) var(--space-7);
  transition: background var(--transition-base);
}

.pillar:hover {
  background: var(--color-surface);
}

.pillar__icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.pillar__icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.pillar__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.pillar__desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
}

/* --- Who We Are --- */
.who {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

.who__content {}

.who__blockquote {
  margin-top: var(--space-7);
  padding-left: var(--space-5);
  border-left: 2px solid var(--color-primary);
}

.who__blockquote p {
  font-size: 1.0625rem;
  color: var(--color-text);
  line-height: 1.65;
  font-style: normal;
}

.who__meta {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.who__meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.who__meta-icon {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  flex-shrink: 0;
}

.who__meta-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.who__meta-text {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.who__visual {
  position: relative;
}

.who__terminal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.who__terminal-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: rgba(255,255,255,0.02);
}

.who__terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.who__terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-left: auto;
}

.who__terminal-body {
  padding: var(--space-5);
}

.who__terminal-body pre {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--color-muted);
  white-space: pre-wrap;
}

.who__terminal-body .t-comment { color: #4A4A4A; }
.who__terminal-body .t-key     { color: #C1121F; }
.who__terminal-body .t-string  { color: #9D9D9D; }
.who__terminal-body .t-value   { color: #D4D4D4; }

/* --- Expertise Grid --- */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.expertise-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: border-color var(--transition-base), background var(--transition-base);
}

.expertise-card:hover {
  border-color: rgba(193, 18, 31, 0.35);
  background: #1a1a1a;
}

.expertise-card__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-primary);
  opacity: 0.6;
  padding-top: 3px;
  flex-shrink: 0;
}

.expertise-card__content {}

.expertise-card__title {
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-1);
}

.expertise-card__desc {
  font-size: 0.8125rem;
  color: var(--color-muted);
  line-height: 1.6;
}

/* --- Research Cards --- */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.research-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.research-card:hover {
  border-color: rgba(193, 18, 31, 0.35);
  transform: translateY(-2px);
}

.research-card__image {
  width: 100%;
  aspect-ratio: 16/9;
  background: #1a1a1a;
  overflow: hidden;
  position: relative;
}

.research-card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.research-card__image-placeholder svg {
  width: 32px;
  height: 32px;
  stroke: var(--color-border);
  fill: none;
  stroke-width: 1.5;
}

.research-card__body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.research-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.tag--primary {
  color: var(--color-primary);
  border-color: rgba(193, 18, 31, 0.3);
  background: rgba(193, 18, 31, 0.06);
}

.research-card__title {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.research-card__summary {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.65;
  flex: 1;
  margin-bottom: var(--space-5);
}

.research-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.research-card__author {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.research-card__author strong {
  color: var(--color-text);
  font-weight: 500;
}

.research-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.research-card__date,
.research-card__time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

/* --- Training Cards --- */
.training-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.training-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.training-card:hover {
  border-color: rgba(193, 18, 31, 0.35);
  transform: translateY(-2px);
}

.training-card__header {
  margin-bottom: var(--space-5);
}

.training-card__conference {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.training-card__title {
  font-size: 1.1875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

.training-card__badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  background: rgba(255,255,255,0.03);
}

.badge svg {
  width: 12px;
  height: 12px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.badge--beginner  { color: #6FCF97; border-color: rgba(111, 207, 151, 0.25); }
.badge--intermediate { color: #F2C94C; border-color: rgba(242, 201, 76, 0.25); }
.badge--advanced  { color: var(--color-accent); border-color: rgba(215, 38, 56, 0.25); }

.training-card__desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: var(--space-6);
}

.training-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.training-card__duration {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.training-card__duration svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

/* --- About Page --- */
.about-hero {
  padding-top: calc(var(--nav-height) + var(--space-10));
  padding-bottom: var(--space-8);
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.principle-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: border-color var(--transition-base);
}

.principle-card:hover {
  border-color: rgba(193, 18, 31, 0.35);
}

.principle-card__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.principle-card__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  letter-spacing: -0.015em;
}

.principle-card__desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.65;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-7);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-7);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-7) - 4px);
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.timeline-item__year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.timeline-item__title {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-3);
}

.timeline-item__desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.65;
  max-width: 540px;
}

/* --- Contact Page --- */
.contact-hero {
  padding-top: calc(var(--nav-height) + var(--space-10));
  padding-bottom: var(--space-8);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-10);
  align-items: start;
}

.contact-info {}

.contact-info__title {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.contact-info__text {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: var(--space-7);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.contact-link:hover {
  border-color: rgba(193, 18, 31, 0.35);
}

.contact-link__icon {
  width: 38px;
  height: 38px;
  background: rgba(193, 18, 31, 0.08);
  border: 1px solid rgba(193, 18, 31, 0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-link__icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-link__label {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.contact-link__value {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

/* --- Contact Form --- */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group:last-of-type {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
  outline: none;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: rgba(193, 18, 31, 0.5);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #4A4A4A;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%239D9D9D' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='2 4 6 8 10 4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

.form-select option {
  background: var(--color-surface);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

/* --- Page-level heroes (inner pages) --- */
.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-10));
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}

.page-hero__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.page-hero__title {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.page-hero__desc {
  font-size: clamp(1rem, 1.25vw, 1.125rem);
  max-width: 540px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-9) var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.cta-banner__content {}

.cta-banner__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.cta-banner__title {
  font-size: clamp(1.5rem, 2.5vw, 2.125rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
}

.cta-banner__desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  max-width: 480px;
}

.cta-banner__actions {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-9);
  padding-bottom: var(--space-7);
  margin-top: var(--space-10);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.footer__brand {}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__logo-mark {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer__logo-mark svg {
  width: 15px;
  height: 15px;
  stroke: white;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.footer__logo-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--color-muted);
  max-width: 260px;
  line-height: 1.65;
  margin-bottom: var(--space-5);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  width: 34px;
  height: 34px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.footer__social-link:hover {
  border-color: rgba(193, 18, 31, 0.35);
  color: var(--color-text);
}

.footer__social-link svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.footer__col {}

.footer__col-title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: 0.875rem;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-text);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.footer__copy a {
  color: var(--color-primary);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-5);
}

.footer__bottom-link {
  font-size: 0.8125rem;
  color: var(--color-muted);
  transition: color var(--transition-fast);
}

.footer__bottom-link:hover {
  color: var(--color-text);
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-muted   { color: var(--color-muted); }
.text-primary { color: var(--color-primary); }

.mt-auto { margin-top: auto; }
.mb-0    { margin-bottom: 0; }

.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-children > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 80ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 160ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 240ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 320ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 400ms; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 480ms; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 560ms; }
.stagger-children.visible > *:nth-child(9) { transition-delay: 640ms; }

/* --- Notice / Alert --- */
.notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: rgba(193, 18, 31, 0.06);
  border: 1px solid rgba(193, 18, 31, 0.2);
  border-radius: var(--radius-md);
}

.notice__icon {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.notice__icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.notice__text {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.65;
}

/* --- 404 --- */
.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6);
}

.error-page__code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-5);
}

.error-page__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.error-page__desc {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 420px;
  margin-bottom: var(--space-7);
}

/* --- Form submit feedback --- */
.form-success {
  display: none;
  padding: var(--space-5);
  background: rgba(111, 207, 151, 0.06);
  border: 1px solid rgba(111, 207, 151, 0.2);
  border-radius: var(--radius-md);
  text-align: center;
  color: #6FCF97;
  font-size: 0.9375rem;
}

.form-success.show {
  display: block;
}

/* --- Research page filter --- */
.filter-bar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.filter-btn {
  padding: 7px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(193, 18, 31, 0.06);
}

/* About page mission/vision */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-10);
}

.mv-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}

.mv-card__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.mv-card__text {
  font-size: 1.0625rem;
  color: var(--color-text);
  line-height: 1.7;
}

/* Scroll-to-top */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 40px;
  height: 40px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-muted);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), border-color var(--transition-fast), color var(--transition-fast);
  z-index: 50;
}

.scroll-top.show {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  border-color: rgba(193, 18, 31, 0.35);
  color: var(--color-text);
}

.scroll-top svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}