/* ==========================================================================
   SIERRA SPECIAL INVESTIGATIONS LLC — Website Styles
   "The Signal in the Noise"
   ========================================================================== */

/* ==========================================================================
   1. CUSTOM PROPERTIES
   ========================================================================== */

:root {
  /* Backgrounds — glass over stone */
  --bg-primary:     transparent;
  --bg-secondary:   rgba(12, 18, 32, 0.65);
  --bg-tertiary:    rgba(17, 26, 46, 0.55);
  --bg-overlay:     rgba(6, 10, 18, 0.75);

  /* Glass effect */
  --glass-bg:       rgba(6, 10, 18, 0.6);
  --glass-bg-heavy: rgba(6, 10, 18, 0.8);
  --glass-blur:     blur(16px);
  --glass-border:   rgba(77, 168, 218, 0.15);

  /* Sierra Blue — electric blue + silver from logo */
  --accent-100:     #e0f0ff;
  --accent-200:     #7ec8f0;
  --accent-300:     #4da8da;
  --accent-400:     #3b82b8;
  --accent-500:     #1e4a6e;
  --accent-gradient: linear-gradient(135deg, #4da8da 0%, #3b82b8 50%, #1e4a6e 100%);

  /* Silver / Chrome */
  --silver-300:     #c0c8d4;
  --silver-400:     #8a95a8;

  /* Text — cool whites */
  --text-primary:   #e4e8ef;
  --text-secondary: #8a95a8;
  --text-dim:       #4a5568;

  /* Borders & Effects — blue-based */
  --border-subtle:  rgba(77, 168, 218, 0.12);
  --border-hover:   rgba(77, 168, 218, 0.35);
  --glow-accent:    0 0 30px rgba(77, 168, 218, 0.15);

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  2rem;
  --space-xl:  4rem;
  --space-2xl: 8rem;

  /* Typography */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.5rem;
  --text-2xl:  2rem;
  --text-3xl:  3rem;
  --text-4xl:  4.5rem;
  --text-hero: clamp(2.5rem, 7vw, 6rem);

  /* Motion */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --duration:  0.4s;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
}

/* ==========================================================================
   2. RESET & BASE
   ========================================================================== */

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: #060a12;
  background-image: url('../assets/bg-stone.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body > * {
  position: relative;
  z-index: 1;
}

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

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

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

ul, ol {
  list-style: none;
}

::selection {
  background: rgba(77, 168, 218, 0.3);
  color: var(--text-primary);
}

/* ==========================================================================
   3. TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.mono {
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
}

/* ==========================================================================
   4. LAYOUT
   ========================================================================== */

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

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

.section__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-300);
  margin-bottom: var(--space-md);
}

.section__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.section__desc {
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   5. BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all var(--duration) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent-300);
  color: var(--bg-primary);
}

.btn--primary:hover {
  background: var(--accent-200);
  box-shadow: 0 0 30px rgba(212, 168, 67, 0.25);
}

.btn--outline {
  border: 1px solid var(--accent-300);
  color: var(--accent-300);
  background: transparent;
}

.btn--outline:hover {
  background: rgba(77, 168, 218, 0.1);
  border-color: var(--accent-200);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-xs);
}

/* ==========================================================================
   6. NAVIGATION
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 100;
  transition: background var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: var(--bg-overlay);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border-subtle);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: color var(--duration) var(--ease-out);
}

.nav__logo-img {
  height: 44px;
  width: auto;
}

.nav__logo-text {
  display: none;
}

.nav__logo:hover {
  color: var(--accent-300);
}

@media (min-width: 640px) {
  .nav__logo-text {
    display: inline;
  }
}

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

.nav__links a:not(.btn) {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--duration) var(--ease-out);
  position: relative;
}

.nav__links a:not(.btn):hover {
  color: var(--accent-300);
}

.nav__links a:not(.btn)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-300);
  transition: width var(--duration) var(--ease-out);
}

.nav__links a:not(.btn):hover::after {
  width: 100%;
}

/* ARGUS Portal Button */
.nav__argus {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem 0.35rem 0.4rem;
  border: 1px solid rgba(77, 168, 218, 0.3);
  border-radius: 6px;
  text-decoration: none;
  color: var(--accent-200);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: all 0.3s ease;
  background: rgba(77, 168, 218, 0.06);
}

.nav__argus:hover {
  border-color: var(--accent-300);
  background: rgba(77, 168, 218, 0.12);
  box-shadow: 0 0 20px rgba(77, 168, 218, 0.15);
  color: var(--accent-100);
}

.nav__argus-img {
  width: 24px;
  height: 24px;
  border-radius: 4px;
}

.nav__argus span {
  font-family: 'JetBrains Mono', monospace;
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 110;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent-300);
  transition: all 0.3s var(--ease-out);
  transform-origin: center;
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile overlay */
.nav__overlay {
  display: none;
}

/* ==========================================================================
   7. HERO
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-xl) 0;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.5rem 1.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  margin-bottom: var(--space-xl);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.hero__badge-sep {
  color: var(--accent-500);
}

.hero__title {
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.hero__title span {
  color: var(--accent-300);
}

.hero__subtitle {
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto var(--space-xl);
}

.hero__ctas {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent-300), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 0.8; transform: scaleY(1); }
}

/* ==========================================================================
   8. CAPABILITIES
   ========================================================================== */

.capabilities {
  background: transparent;
}

.capabilities__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.capability-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-top: 3px solid var(--accent-300);
  padding: var(--space-xl) var(--space-lg);
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out);
}

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

.capability-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-lg);
  color: var(--accent-300);
}

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

.capability-card__text {
  font-size: var(--text-sm);
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.capability-card__tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  color: var(--accent-500);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   9. BY THE NUMBERS
   ========================================================================== */

.numbers {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}

/* Subtle grid overlay */
.numbers::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(77, 168, 218, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77, 168, 218, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.numbers__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  position: relative;
  z-index: 1;
}

.stat {
  text-align: center;
  padding: var(--space-lg) 0;
}

.stat__number {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-4xl);
  font-weight: 500;
  color: var(--accent-300);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-sm);
}

.stat__label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.stat__divider {
  width: 40px;
  height: 1px;
  background: var(--accent-500);
  margin: var(--space-md) auto;
}

/* ==========================================================================
   10. COMPETITIVE MATRIX
   ========================================================================== */

.matrix {
  background: transparent;
}

.matrix__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.matrix__text h2 {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-3xl));
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.matrix__text h2 span {
  color: var(--accent-300);
}

.matrix__text p {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.7;
}

.matrix__table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: var(--space-sm);
}

.matrix__table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.matrix__table th {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.matrix__table th:last-child {
  color: var(--accent-300);
}

.matrix__table td {
  padding: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-weight: 300;
}

.matrix__table tr:last-child td {
  border-bottom: none;
}

.matrix__table td:first-child {
  color: var(--text-primary);
  font-weight: 400;
}

.matrix__table .yes {
  color: var(--accent-300);
  font-weight: 600;
}

.matrix__table .no {
  color: var(--text-dim);
}

.matrix__table .partial {
  color: var(--text-secondary);
}

/* ==========================================================================
   11. LEADERSHIP
   ========================================================================== */

.leadership {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

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

.leadership__inner--second {
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-subtle);
}

.leadership__name {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-xs);
}

.leadership__role {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--accent-300);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.leadership__bio p {
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

/* Credential Stack */
.credential-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.credential {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: rgba(17, 26, 46, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--accent-500);
  transition: border-color var(--duration) var(--ease-out);
}

.credential:hover {
  border-left-color: var(--accent-300);
}

.credential__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  min-width: 120px;
  flex-shrink: 0;
}

.credential__value {
  font-size: var(--text-sm);
  color: var(--text-primary);
  font-weight: 400;
}

/* ==========================================================================
   12. CONTACT
   ========================================================================== */

.contact {
  background: transparent;
}

.contact__inner {
  max-width: 640px;
  margin: 0 auto;
}

.contact__note {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: var(--space-xl);
}

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

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

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.form__input,
.form__select,
.form__textarea {
  background: rgba(6, 10, 18, 0.5);
  border: 1px solid var(--glass-border);
  border-radius: 2px;
  color: var(--text-primary);
  padding: 0.875rem var(--space-md);
  font-family: inherit;
  font-size: var(--text-base);
  width: 100%;
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
  appearance: none;
  -webkit-appearance: none;
}

.form__select {
  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 d='M2 4l4 4 4-4' fill='none' stroke='%238a95a8' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--accent-300);
  box-shadow: 0 0 0 3px rgba(77, 168, 218, 0.1);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--text-dim);
}

.form__submit {
  margin-top: var(--space-md);
}

/* ==========================================================================
   13. FOOTER
   ========================================================================== */

.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-bg-heavy);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.footer__inner {
  text-align: center;
}

.footer__name {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.footer__details {
  font-size: var(--text-xs);
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer__details span {
  margin: 0 var(--space-sm);
}

.footer__legal {
  font-size: var(--text-xs);
  color: var(--text-dim);
  line-height: 1.6;
}

/* ==========================================================================
   14. SCROLL REVEAL ANIMATIONS
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* Gold scan line between sections */
.section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--accent-gradient);
  transition: width 1s var(--ease-out), left 1s var(--ease-out);
}

.section.scanned::after {
  width: 100%;
  left: 0;
}

/* ==========================================================================
   15. RESPONSIVE
   ========================================================================== */

/* Tablet (640px) */
@media (min-width: 640px) {
  .form__row {
    grid-template-columns: 1fr 1fr;
  }

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

  .numbers__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .stat__number {
    font-size: var(--text-3xl);
  }
}

/* Desktop (1024px) */
@media (min-width: 1024px) {
  .nav__toggle {
    display: none !important;
  }

  .nav__links {
    display: flex !important;
  }

  .matrix__inner {
    grid-template-columns: 1fr 1.2fr;
  }

  .leadership__inner {
    grid-template-columns: 1.2fr 1fr;
  }

  .stat__number {
    font-size: var(--text-4xl);
  }
}

/* Mobile (max 1023px) */
@media (max-width: 1023px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    z-index: 105;
  }

  .nav__links.active {
    display: flex;
  }

  .nav__links a:not(.btn) {
    font-size: var(--text-lg);
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3.5rem);
  }

  .hero__badge {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 0.65rem;
  }

  .credential__label {
    min-width: 90px;
    font-size: 0.65rem;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

  .hero__ctas .btn {
    width: 100%;
    max-width: 280px;
  }

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