/* ==========================================================================
   Unified Professional Portfolio Styles
   Consolidated from dual codebase - clean, maintainable, professional
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --bg: #050b14;
  --bg-elevated: rgba(12, 14, 24, 0.88);
  --line: rgba(151, 175, 201, 0.24);
  --text: #e8f2ff;
  --text-dim: #a3b5ca;
  --text-secondary: #9a9aac;
  --text-tertiary: #717187;
  
  /* Accent colors */
  --accent: #30c7ff;
  --accent-2: #17f1a2;
  --accent-3: #ff6a3d;
  --highlight: #00d4ff;
  --highlight-soft: rgba(0, 212, 255, 0.14);
  --success: #7ef0c5;
  
  /* Glass effect */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-strong: rgba(255, 255, 255, 0.14);
  
  /* Shadows */
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --shadow-soft: 0 20px 60px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 0 1px rgba(0, 212, 255, 0.08), 0 0 40px rgba(0, 212, 255, 0.08);
  
  /* Typography */
  --font-heading: 'Syne', sans-serif;
  --font-body: 'Manrope', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Layout */
  --container-max: 1200px;
  --container-padding: clamp(1.25rem, 2vw, 2rem);
  --section-gap: clamp(5rem, 11vh, 8rem);
  --radius-sm: 14px;
  --radius-md: 22px;
  --radius-lg: 32px;
  
  /* Animation */
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  
  /* Z-index scale */
  --z-background: -10;
  --z-base: 1;
  --z-nav: 100;
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
  color-scheme: dark;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 18%, rgba(48, 199, 255, 0.22) 0%, transparent 42%),
    radial-gradient(circle at 88% 8%, rgba(23, 241, 162, 0.12) 0%, transparent 34%),
    radial-gradient(circle at 88% 78%, rgba(255, 106, 61, 0.12) 0%, transparent 35%),
    linear-gradient(170deg, #040a12 0%, #07101a 45%, #050b14 100%);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 180ms var(--ease-out);
}

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

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

::selection {
  background: rgba(0, 212, 255, 0.24);
  color: var(--text);
}

/* --------------------------------------------------------------------------
   Background Effects
   -------------------------------------------------------------------------- */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
  background-image: radial-gradient(rgba(255, 255, 255, 0.25) 0.5px, transparent 0.5px);
  background-size: 3px 3px;
  z-index: var(--z-background);
}

.background-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(40rem 40rem at 10% 30%, rgba(48, 199, 255, 0.11), transparent 70%),
    radial-gradient(32rem 32rem at 90% 10%, rgba(23, 241, 162, 0.09), transparent 65%),
    radial-gradient(34rem 34rem at 80% 85%, rgba(255, 106, 61, 0.1), transparent 70%);
  filter: blur(4px);
  animation: orbShift 18s ease-in-out infinite alternate;
  z-index: calc(var(--z-background) - 1);
}

@keyframes orbShift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(0, -20px, 0) scale(1.05); }
}

/* --------------------------------------------------------------------------
   Layout & Container
   -------------------------------------------------------------------------- */
.container {
  width: min(var(--container-max), calc(100% - 2.2rem));
  margin: 0 auto;
  padding-inline: var(--container-padding);
}

section {
  padding: 5.5rem 0;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(151, 175, 201, 0.12);
  background: rgba(5, 11, 20, 0.74);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
}

.brand-mark {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: #071018;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  border-radius: 0.5rem;
  width: 2.3rem;
  height: 2.3rem;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px rgba(48, 199, 255, 0.28);
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: rgba(7, 16, 28, 0.8);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 99px;
  background: var(--text);
  margin: 6px auto;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-dim);
  font-weight: 600;
  transition: color 180ms ease, transform 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.active {
  color: var(--accent);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.eyebrow {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 0.9rem;
  font-size: 0.78rem;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.hero h1,
.page-hero h1 {
  font-size: clamp(2rem, 6.8vw, 4.6rem);
  max-width: 16ch;
}

.gradient-text {
  background: linear-gradient(130deg, var(--accent), var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero,
.page-hero {
  padding-top: 6.5rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 680px;
}

.hero h1 {
  margin: 0;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-dim);
  margin-top: 1rem;
  max-width: 50ch;
}

.hero-description {
  margin-top: 1.5rem;
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 58ch;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.hero-socials {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
}

.hero-socials a {
  color: var(--text-dim);
  font-weight: 500;
  position: relative;
}

.hero-socials a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 300ms var(--ease-out);
}

.hero-socials a:hover {
  color: var(--accent);
}

.hero-socials a:hover::after {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  font-weight: 700;
  padding: 0.75rem 1.35rem;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  color: #04101b;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 12px 28px rgba(48, 199, 255, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 16px 32px rgba(48, 199, 255, 0.4);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid rgba(151, 175, 201, 0.4);
  background: rgba(7, 16, 28, 0.55);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent);
  background: rgba(7, 16, 28, 0.7);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: linear-gradient(165deg, rgba(15, 31, 51, 0.86), rgba(8, 19, 32, 0.84));
  box-shadow: var(--shadow);
  transition: transform 300ms var(--ease-out), box-shadow 300ms var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.4);
}

.glass-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-soft);
}

/* --------------------------------------------------------------------------
   Grids
   -------------------------------------------------------------------------- */
.stats-grid,
.skills-grid,
.project-grid,
.contact-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.stats-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skills-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.contact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* --------------------------------------------------------------------------
   Stats & Info Cards
   -------------------------------------------------------------------------- */
.stat-card {
  padding: 1.5rem;
  text-align: center;
}

.stat-card strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--accent);
}

.stat-card span {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.info-grid li {
  padding: 1.1rem;
}

.info-grid strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.12rem;
  margin-bottom: 0.25rem;
}

.info-grid span {
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Section Headers
   -------------------------------------------------------------------------- */
.section-header {
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-top: 0.5rem;
}

.section-header p {
  color: var(--text-dim);
  margin-top: 0.75rem;
  max-width: 60ch;
}

/* --------------------------------------------------------------------------
   Skills Section
   -------------------------------------------------------------------------- */
.skill-category {
  padding: 1.5rem;
}

.skill-category h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-dim);
  transition: all 200ms ease;
}

.skill-tag:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--highlight-soft);
  color: var(--text);
}

/* --------------------------------------------------------------------------
   Project Cards
   -------------------------------------------------------------------------- */
.project-card {
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 300ms ease;
}

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

.project-card .project-index {
  font-family: var(--font-mono);
  color: var(--accent-2);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-card h3 {
  font-size: 1.3rem;
  margin-top: 0.5rem;
}

.project-card p {
  color: var(--text-dim);
  margin-top: 0.75rem;
  font-size: 0.95rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  list-style: none;
}

.tag-list li {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: #d4f2ff;
  border: 1px solid rgba(151, 175, 201, 0.35);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact-form {
  padding: 2rem;
}

.contact-form label {
  display: block;
  margin-bottom: 1rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 0.85rem 1rem;
  margin-top: 0.4rem;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--highlight-soft);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

.form-status {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--accent-2);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-content p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-dim);
  font-size: 0.9rem;
}

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

/* --------------------------------------------------------------------------
   Scroll Reveal Animation
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

.reveal.animate {
  opacity: 0;
  transform: translateY(24px);
}

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

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 980px) {
  .stats-grid,
  .skills-grid,
  .project-grid,
  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  section {
    padding: 4rem 0;
  }
  
  .nav-toggle {
    display: inline-block;
  }
  
  .nav-links {
    position: absolute;
    left: 1.1rem;
    right: 1.1rem;
    top: 74px;
    border: 1px solid var(--line);
    background: rgba(7, 16, 28, 0.96);
    border-radius: 0.9rem;
    padding: 0.85rem;
    display: grid;
    gap: 0.3rem;
    transform-origin: top right;
    transform: scale(0.98);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
  }
  
  .nav-links.open {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
  }
  
  .nav-links a {
    display: block;
    padding: 0.55rem 0.6rem;
    border-radius: 0.55rem;
  }
  
  .hero,
  .page-hero {
    padding-top: 5rem;
    min-height: auto;
  }
  
  .stats-grid,
  .skills-grid,
  .project-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .reveal {
    opacity: 1;
    transform: none;
  }
}