/* ============================================================
   QDBP Academy — Design System & Styles
   Computer Systems Design and Related Services
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- Custom Properties --- */
:root {
  /* Color System */
  --color-deep:            #060b14;
  --color-surface:         #0d1525;
  --color-surface-raised:  #131d33;
  --color-surface-hover:   #182540;
  --color-border:          #1e2d4a;
  --color-border-light:    #263556;
  --color-accent:          #00e5a0;
  --color-accent-alt:      #4d8af0;
  --color-accent-warm:     #f59e0b;
  --color-accent-rose:     #f472b6;
  --color-accent-purple:   #a78bfa;
  --color-text:            #f0f2f5;
  --color-text-secondary:  #a5b4cc;
  --color-text-muted:      #6b7d95;
  --color-success:         #00e5a0;
  --color-warning:         #f59e0b;
  --color-error:           #ef4444;
  --color-white:           #ffffff;

  /* Typography */
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', monospace;
  --fs-xs:      0.75rem;    /* 12px */
  --fs-sm:      0.875rem;   /* 14px */
  --fs-base:    1rem;       /* 16px */
  --fs-md:      1.125rem;   /* 18px */
  --fs-lg:      1.25rem;    /* 20px */
  --fs-xl:      1.5rem;     /* 24px */
  --fs-2xl:     2rem;       /* 32px */
  --fs-3xl:     2.5rem;     /* 40px */
  --fs-4xl:     3.5rem;     /* 56px */
  --fs-5xl:     4.5rem;     /* 72px */
  --fs-6xl:     5.5rem;     /* 88px */

  /* Spacing */
  --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;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width:     1280px;
  --max-width-narrow: 860px;
  --radius-sm:     4px;
  --radius-md:     8px;
  --radius-lg:     12px;
  --radius-xl:     16px;
  --radius-2xl:    24px;

  /* Shadows */
  --shadow-sm:     0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:     0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg:     0 8px 32px rgba(0,0,0,0.5);
  --shadow-xl:     0 16px 48px rgba(0,0,0,0.6);
  --shadow-glow:   0 0 40px rgba(0,229,160,0.15);
  --shadow-glow-blue: 0 0 40px rgba(77,138,240,0.12);

  /* Transitions */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:   cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-glacial: 800ms;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-accent-alt);
}

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font: inherit;
  color: inherit;
}

::selection {
  background-color: var(--color-accent);
  color: var(--color-deep);
}

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

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* --- Section Spacing --- */
.section {
  padding-block: var(--space-24);
}

.section-header {
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--fs-4xl);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.section-subtitle {
  font-size: var(--fs-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.6;
}

/* --- Announcement Bar --- */
.announcement-bar {
  background: linear-gradient(135deg, var(--color-accent) 0%, #00c98a 100%);
  color: var(--color-deep);
  text-align: center;
  padding-block: var(--space-3);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.announcement-bar a {
  color: var(--color-deep);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: 600;
}

.announcement-bar a:hover {
  color: var(--color-deep);
  text-decoration-thickness: 2px;
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-deep);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: var(--fs-lg);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo-accent {
  color: var(--color-accent);
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text);
  background-color: var(--color-surface-raised);
}

.nav-cta {
  margin-left: var(--space-4);
  padding: var(--space-2) var(--space-5);
  background-color: var(--color-accent);
  color: var(--color-deep);
  font-weight: 600;
  font-size: var(--fs-sm);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background-color: #00f0aa;
  color: var(--color-deep);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

/* --- Mobile Menu --- */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  gap: 5px;
  z-index: 110;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base) var(--ease-out);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Knowledge Exchange Hero --- */
.hero {
  position: relative;
  padding-block: var(--space-32) var(--space-24);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,229,160,0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(77,138,240,0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background-color: var(--color-accent);
}

.hero-title {
  font-size: var(--fs-6xl);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero-title span {
  display: block;
  color: var(--color-accent);
}

.hero-description {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: var(--space-8);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: #00f0aa;
  color: var(--color-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: rgba(0,229,160,0.05);
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-card-stack {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 4 / 3;
}

.hero-card {
  position: absolute;
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  transition: transform var(--duration-slow) var(--ease-out);
}

.hero-card:nth-child(1) {
  top: 0;
  left: 0;
  width: 75%;
  z-index: 3;
}

.hero-card:nth-child(2) {
  top: 50px;
  right: 0;
  width: 65%;
  z-index: 2;
  opacity: 0.85;
}

.hero-card:nth-child(3) {
  bottom: 0;
  left: 30px;
  width: 55%;
  z-index: 1;
  opacity: 0.6;
}

.hero-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: var(--fs-xl);
}

.hero-card-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.hero-card-value {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.hero-card-detail {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* --- Capability Matrix --- */
.capability-matrix {
  padding-block: var(--space-24);
  background-color: var(--color-surface);
  position: relative;
}

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

.capability-card {
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.capability-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.capability-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.capability-card:hover::before {
  opacity: 1;
}

.capability-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  font-size: var(--fs-2xl);
  transition: background-color var(--duration-base) var(--ease-out);
}

.capability-card:hover .capability-icon-wrap {
  background-color: var(--color-surface-hover);
}

.capability-name {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.capability-desc {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.capability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.capability-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: 100px;
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* --- Methodology Section --- */
.methodology {
  padding-block: var(--space-24);
  position: relative;
}

.methodology-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  position: relative;
}

.methodology-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    var(--color-accent) 0%,
    var(--color-accent) 20%,
    var(--color-border) 20%,
    var(--color-border) 33%,
    var(--color-accent-alt) 33%,
    var(--color-accent-alt) 53%,
    var(--color-border) 53%,
    var(--color-border) 66%,
    var(--color-accent-warm) 66%,
    var(--color-accent-warm) 86%,
    var(--color-border) 86%
  );
  z-index: 0;
}

.methodology-step {
  position: relative;
  z-index: 1;
  text-align: center;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  border-radius: 50%;
  background-color: var(--color-surface-raised);
  border: 2px solid var(--color-border);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--color-text);
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}

.methodology-step:nth-child(1) .step-number { border-color: var(--color-accent); }
.methodology-step:nth-child(2) .step-number { border-color: var(--color-accent-alt); }
.methodology-step:nth-child(3) .step-number { border-color: var(--color-accent-warm); }
.methodology-step:nth-child(4) .step-number { border-color: var(--color-accent-rose); }

.methodology-step:hover .step-number {
  transform: scale(1.08);
}

.methodology-step:nth-child(1):hover .step-number { box-shadow: 0 0 32px rgba(0,229,160,0.25); }
.methodology-step:nth-child(2):hover .step-number { box-shadow: 0 0 32px rgba(77,138,240,0.25); }
.methodology-step:nth-child(3):hover .step-number { box-shadow: 0 0 32px rgba(245,158,11,0.25); }
.methodology-step:nth-child(4):hover .step-number { box-shadow: 0 0 32px rgba(244,114,182,0.25); }

.step-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.step-desc {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Industries Section --- */
.industries {
  padding-block: var(--space-24);
  background-color: var(--color-surface);
}

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

.industry-card {
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: border-color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}

.industry-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.industry-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  display: block;
}

.industry-name {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--color-text);
}

/* --- Stats / Counter Section --- */
.impact {
  padding-block: var(--space-24);
  position: relative;
}

.impact-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.stat-item {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}

.stat-item:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.stat-value {
  font-size: var(--fs-5xl);
  font-weight: 900;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.stat-suffix {
  font-size: var(--fs-3xl);
  font-weight: 700;
}

.stat-label {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* --- Testimonial --- */
.testimonial {
  padding-block: var(--space-24);
  background-color: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.testimonial::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,229,160,0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.testimonial-card {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.testimonial-quote {
  font-size: var(--fs-2xl);
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  position: relative;
}

.testimonial-quote::before {
  content: '\201C';
  display: block;
  font-size: 6rem;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  font-weight: 900;
  font-family: Georgia, serif;
}

.testimonial-author {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.testimonial-role {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* --- Contact Section --- */
.contact {
  padding-block: var(--space-24);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info-title {
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.contact-info-desc {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-10);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-detail {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
}

.contact-detail-label {
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.contact-detail-value {
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--color-text);
}

.contact-form-wrap {
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
}

.form-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

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

.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--fs-base);
  color: var(--color-text);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,229,160,0.1);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7d95' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

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

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  width: 100%;
  padding: var(--space-4);
  background-color: var(--color-accent);
  color: var(--color-deep);
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.form-submit:hover {
  background-color: #00f0aa;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.form-message {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  display: none;
}

.form-message.success {
  display: block;
  background-color: rgba(0,229,160,0.1);
  color: var(--color-accent);
  border: 1px solid rgba(0,229,160,0.25);
}

.form-message.error {
  display: block;
  background-color: rgba(239,68,68,0.1);
  color: var(--color-error);
  border: 1px solid rgba(239,68,68,0.25);
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-20) var(--space-10);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer-brand-desc {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-top: var(--space-4);
  max-width: 340px;
}

.footer-heading {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-5);
}

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

.footer-link {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.footer-legal {
  display: flex;
  gap: var(--space-6);
}

.footer-legal-link {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.footer-legal-link:hover {
  color: var(--color-accent);
}

/* --- Page Header (Subpages) --- */
.page-header {
  padding-block: var(--space-20) var(--space-12);
  text-align: center;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: var(--fs-4xl);
  font-weight: 900;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.page-subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
}

/* --- Policy Content --- */
.policy-content {
  padding-block: var(--space-16);
}

.policy-section {
  margin-bottom: var(--space-12);
}

.policy-section h2 {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.policy-section h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.policy-section p {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.policy-section ul,
.policy-section ol {
  list-style: disc;
  padding-left: var(--space-6);
  margin-bottom: var(--space-4);
}

.policy-section ol {
  list-style: decimal;
}

.policy-section li {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-2);
}

.policy-section strong {
  color: var(--color-text);
  font-weight: 600;
}

.policy-section em {
  color: var(--color-accent);
  font-style: italic;
}

.policy-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--color-accent);
}

.policy-back:hover {
  color: var(--color-accent-alt);
}

.policy-effective {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--space-10);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-glacial) var(--ease-out),
              transform var(--duration-glacial) var(--ease-out);
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity var(--duration-glacial) var(--ease-out),
              transform var(--duration-glacial) var(--ease-out);
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(32px);
  transition: opacity var(--duration-glacial) var(--ease-out),
              transform var(--duration-glacial) var(--ease-out);
}

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

.scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity var(--duration-glacial) var(--ease-out),
              transform var(--duration-glacial) var(--ease-out);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-glacial) var(--ease-out),
              transform var(--duration-glacial) var(--ease-out);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 500ms; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 600ms; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 700ms; }
.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile Navigation Overlay --- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background-color: var(--color-deep);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.mobile-nav.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-link {
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--duration-fast) var(--ease-out);
}

.mobile-nav-link:hover {
  color: var(--color-accent);
}

.mobile-nav-cta {
  margin-top: var(--space-4);
  padding: var(--space-4) var(--space-8);
  background-color: var(--color-accent);
  color: var(--color-deep);
  font-size: var(--fs-lg);
  font-weight: 600;
  border-radius: var(--radius-md);
}

/* --- Responsive Design --- */
/* Desktop-first: max-width queries for smaller screens */

@media (max-width: 1024px) {
  :root {
    --fs-6xl: 4rem;
    --fs-5xl: 3.5rem;
    --fs-4xl: 2.75rem;
    --fs-3xl: 2rem;
    --fs-2xl: 1.75rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-visual {
    order: -1;
  }

  .hero-card-stack {
    max-width: 360px;
    margin: 0 auto;
  }

  .capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .methodology-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-10);
  }

  .methodology-steps::before {
    display: none;
  }

  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .impact-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  :root {
    --fs-6xl: 3rem;
    --fs-5xl: 2.75rem;
    --fs-4xl: 2.25rem;
    --fs-3xl: 1.75rem;
    --fs-2xl: 1.5rem;
    --fs-xl: 1.25rem;
  }

  .section {
    padding-block: var(--space-16);
  }

  .nav-list {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .mobile-nav {
    display: flex;
  }

  .header-inner {
    height: 64px;
  }

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

  .methodology-steps {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin-inline: auto;
  }

  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .impact-stats {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .stat-value {
    font-size: var(--fs-4xl);
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }

  .contact-form-wrap {
    padding: var(--space-6);
  }
}

@media (max-width: 480px) {
  .container,
  .container-narrow {
    padding-inline: var(--space-4);
  }

  .hero {
    padding-block: var(--space-20) var(--space-12);
  }

  .hero-title {
    font-size: var(--fs-4xl);
  }

  .section-title {
    font-size: var(--fs-3xl);
  }

  .impact-stats {
    grid-template-columns: 1fr;
  }

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

  .policy-section h2 {
    font-size: var(--fs-xl);
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}