/* ==============================================================================
   Local Self-Hosted Inter Font Family (ANSSI & GDPR Compliant, Zero CDN)
   ============================================================================== */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../assets/fonts/inter-latin-400.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../assets/fonts/inter-latin-500.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../assets/fonts/inter-latin-600.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../assets/fonts/inter-latin-700.woff2") format("woff2");
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("../assets/fonts/inter-latin-800.woff2") format("woff2");
}

/* ==============================================================================
   Design System Tokens (Material Design 3 Dark Theme - Deep Slate)
   ============================================================================== */
:root {
  /* Surfaces & Backgrounds - Anti-Halation Dark Base */
  --md-sys-color-background: #0f172a;
  --md-sys-color-surface: #0d0f12;
  --md-sys-color-surface-variant: #1e293b;
  --md-sys-color-surface-container: #162032;
  --md-sys-color-border: #334155;
  --md-sys-color-border-hover: #475569;

  /* Typography Colors */
  --md-sys-color-on-background: #f8fafc;
  --md-sys-color-on-surface: #e2e2e5;
  --md-sys-color-on-surface-variant: #94a3b8;
  --md-sys-color-on-surface-subtle: #64748b;

  /* Primary Brand Accents */
  --md-sys-color-primary: #38bdf8;
  --md-sys-color-primary-hover: #7dd3fc;
  --md-sys-color-primary-container: rgba(56, 189, 248, 0.12);
  --md-sys-color-on-primary-container: #bae6fd;
  --md-sys-color-accent: #99c7ff;

  /* Semantic Alerts */
  --md-sys-color-success: #34d399;
  --md-sys-color-warning: #fbbf24;
  --md-sys-color-error: #f87171;
  --md-sys-color-error-container: rgba(248, 113, 113, 0.12);

  /* Elevation Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 12px -1px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.55);

  /* Layout & Geometry */
  --font-family:
    "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  --navbar-height: 72px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==============================================================================
   Core Resets & Base Styles
   ============================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--navbar-height) + 20px);
}

body {
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.65;
  padding-top: var(--navbar-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ==============================================================================
   Navigation Bar & Drawer
   ============================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background-color: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--md-sys-color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--md-sys-color-on-background);
}

.nav-logo {
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a:not(.nav-cta) {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.nav-links a:not(.nav-cta):hover,
.nav-links a.active {
  color: var(--md-sys-color-primary);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--md-sys-color-primary);
  color: #002b49;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
  cursor: pointer;
  border: none;
}

.btn-primary:hover {
  background-color: var(--md-sys-color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
}

/* Mobile Hamburger Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle .bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--md-sys-color-on-surface);
  border-radius: 2px;
  transition:
    transform var(--transition-fast),
    opacity var(--transition-fast);
}

.nav-toggle.open .bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.nav-toggle.open .bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open .bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background-color: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--md-sys-color-border);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.25rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition:
      transform var(--transition-smooth),
      opacity var(--transition-smooth);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    width: 100%;
    text-align: center;
    padding: 0.75rem 1rem;
    font-size: 1.1rem;
  }
}

/* ==============================================================================
   Layout Container & Sections
   ============================================================================== */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* Status Pill Badge */
.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--md-sys-color-success);
  box-shadow: 0 0 8px var(--md-sys-color-success);
}

/* Hero Section */
.hero {
  padding: clamp(3rem, 8vw, 5.5rem) 0 2.5rem;
  border-bottom: 1px solid var(--md-sys-color-border);
}

.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--md-sys-color-on-background);
  margin-bottom: 1rem;
}

.hero .lead {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--md-sys-color-on-surface-variant);
  max-width: 760px;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-border);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background-color: #283548;
  border-color: var(--md-sys-color-border-hover);
  color: var(--md-sys-color-on-background);
  transform: translateY(-1px);
}

/* ==============================================================================
   Section Headings & Grids
   ============================================================================== */
.section-header {
  margin: 4.5rem 0 2rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--md-sys-color-on-background);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1.05rem;
}

/* Expertise Grid */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.expertise-card {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.expertise-card:hover {
  transform: translateY(-3px);
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.expertise-card h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--md-sys-color-on-background);
}

.expertise-card p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.95rem;
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  background-color: rgba(51, 65, 85, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.15);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

/* Projects / Ventures Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--md-sys-color-primary),
    var(--md-sys-color-accent)
  );
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--md-sys-color-border-hover);
  box-shadow: var(--shadow-lg);
}

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

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.project-category {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--md-sys-color-primary);
}

.project-card h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--md-sys-color-on-background);
}

.project-card p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid rgba(51, 65, 85, 0.4);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--md-sys-color-primary);
  transition: gap var(--transition-fast);
}

.project-card:hover .project-link {
  gap: 0.65rem;
}

/* ==============================================================================
   Industry Track Record & Milestones
   ============================================================================== */
.milestones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.milestone-card {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.milestone-card:hover {
  transform: translateY(-2px);
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--shadow-sm);
}

.milestone-meta {
  display: flex;
  align-items: center;
  margin-bottom: 0.75rem;
}

.milestone-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--md-sys-color-primary);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  line-height: 1.25;
}

.milestone-company {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--md-sys-color-on-background);
  line-height: 1.25;
  margin-bottom: 0.35rem;
}

.milestone-role {
  font-size: 0.9rem;
  color: var(--md-sys-color-accent);
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.milestone-desc {
  font-size: 0.88rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.55;
  margin-bottom: 1rem;
}

/* ==============================================================================
   Contact Interactive Card
   ============================================================================== */
.contact-card {
  background: linear-gradient(
    180deg,
    var(--md-sys-color-surface-container) 0%,
    var(--md-sys-color-surface) 100%
  );
  border: 1px solid var(--md-sys-color-border);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 3.5rem);
  text-align: center;
  margin-top: 4.5rem;
  box-shadow: var(--shadow-md);
}

.contact-card h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--md-sys-color-on-background);
}

.contact-card p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.btn-copy-email {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--md-sys-color-surface-variant);
  border: 1px solid var(--md-sys-color-border);
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-copy-email:hover {
  border-color: var(--md-sys-color-primary);
  background-color: #273449;
  color: var(--md-sys-color-on-background);
  transform: scale(1.02);
}

.btn-copy-email.copied {
  background-color: rgba(52, 211, 153, 0.15);
  border-color: var(--md-sys-color-success);
  color: var(--md-sys-color-success);
}

/* ==============================================================================
   Footer
   ============================================================================== */
footer {
  margin-top: 5rem;
  border-top: 1px solid var(--md-sys-color-border);
  background-color: var(--md-sys-color-surface);
  padding: 3.5rem 1.5rem 2.5rem;
}

.footer-content {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.footer-brand strong {
  font-size: 1.1rem;
  color: var(--md-sys-color-on-background);
  display: block;
  margin-bottom: 0.35rem;
}

.footer-brand p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.9rem;
  margin-bottom: 1.75rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-links a {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--md-sys-color-primary);
}

.footer-copy {
  color: var(--md-sys-color-on-surface-subtle);
  font-size: 0.8rem;
}

/* ==============================================================================
   404 Specific Diagnostics Terminal
   ============================================================================== */
.error-container {
  text-align: center;
  padding: clamp(3rem, 8vw, 6rem) 1.5rem;
  max-width: 700px;
  margin: 0 auto;
}

.error-code {
  font-size: clamp(5rem, 14vw, 8.5rem);
  font-weight: 800;
  line-height: 1;
  color: var(--md-sys-color-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.04em;
}

.tech-terminal {
  background-color: #0b0f19;
  border: 1px solid var(--md-sys-color-border);
  border-left: 4px solid var(--md-sys-color-primary);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  text-align: left;
  color: #93c5fd;
  margin: 2rem auto;
  line-height: 1.8;
  max-width: 480px;
}