/* assets/css/styles.css */

/* Base */
:root {
  --bg: #0d1117;
  --fg: #e6edf3;
  --accent: #3b82f6;
  --card-bg: rgba(255,255,255,0.05);
  --border: rgba(255,255,255,0.1);
  --shadow: 0 0 30px rgba(59,130,246,0.25);
  --radius: 16px;
  --font: 'Inter', sans-serif;
}

/* Light theme variables applied when html[data-theme="light"] */
html[data-theme="light"] {
  --bg: #f6f8fb;
  --fg: #0b1220;
  --accent: #2563eb;
  --card-bg: rgba(11,18,32,0.04);
  --border: rgba(11,18,32,0.06);
  --shadow: 0 4px 24px rgba(37,99,235,0.08);
}

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

html, body {
  scroll-behavior: smooth;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  overflow-x: hidden;
}

/* Skip link (accessible keyboard users) */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  width: auto;
  height: auto;
  padding: 8px 12px;
  background: var(--card-bg);
  color: var(--fg);
  border-radius: 6px;
  z-index: 2000;
}

/* Honeypot field hidden from users */
.honeypot { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }

/* Better focus outlines for keyboard users */
:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: 0.3s;
}
a:hover { opacity: 0.8; }

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  backdrop-filter: blur(16px);
  background: rgba(13,17,23,0.7);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.header-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}
.brand {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--fg);
}
.dot { color: var(--accent); }
.nav a {
  margin: 0 1rem;
  font-weight: 500;
  transition: 0.3s;
}
.nav a.cta {
  padding: 8px 16px;
  background: var(--accent);
  border-radius: 8px;
  color: white;
  font-weight: 600;
}
.nav a.cta:hover { background: #2563eb; }

/* Hero */
.hero {
  display: flex;
  align-items: center;
  min-height: 90vh;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 40%, #2563eb40, transparent 60%), 
              radial-gradient(circle at 80% 60%, #9333ea40, transparent 60%);
  animation: moveBg 10s infinite alternate ease-in-out;
}
@keyframes moveBg {
  0% { background-position: 20% 40%, 80% 60%; }
  100% { background-position: 40% 60%, 60% 40%; }
}
.hero-text {
  position: relative;
  z-index: 2;
  max-width: 600px;
}
.hero h2 {
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.hero .lead {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.85;
}
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}
.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(59,130,246,0.5);
}
.btn.ghost {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* Socials */
.socials {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}
.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border);
  transition: 0.3s;
}
.social-btn:hover {
  transform: scale(1.1);
  color: var(--accent);
}

/* Header social icons (small) */
.header-socials {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-left: 8px;
  /* subtle entrance animation */
  opacity: 0;
  transform: translateY(-6px) scale(.98);
  animation: headerIconsIn 560ms cubic-bezier(.2,.9,.3,1) forwards;
  animation-delay: 320ms;
}
.header-social-btn {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--fg);
  transition: transform 0.2s, color 0.2s;
}
.header-social-btn:hover { transform: translateY(-2px); color: var(--accent); }

@keyframes headerIconsIn {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* hide mobile nav socials on desktop by default; shown only on small screens */
.mobile-nav-socials { display: none; }

/* Sections */
.section {
  padding: 80px 0;
}
.section.alt {
  background: rgba(255,255,255,0.03);
}
.section h3 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
}

/* Cards (Services) */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px,1fr));
  gap: 1.5rem;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: 0.4s ease;
  transform-style: preserve-3d;
}
.card:hover {
  transform: translateY(-8px) scale(1.03);
  border-color: var(--accent);
  box-shadow: 0 0 25px rgba(59,130,246,0.3);
}

/* Portfolio */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
  gap: 1.5rem;
}
.project {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.4s, box-shadow 0.4s;
}
.project img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}
.project h4 {
  margin: 1rem;
  color: var(--accent);
}
.project p {
  margin: 0 1rem 1.5rem;
  opacity: 0.8;
}
.project:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 20px rgba(59,130,246,0.3);
}

/* Contact */
.contact-panel {
  max-width: 600px;
  margin: auto;
  background: var(--card-bg);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.form-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
}
label { margin-bottom: .4rem; font-weight: 500; }
input, textarea {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  color: var(--fg);
  font-size: 1rem;
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(59,130,246,0.5);
}

/* Footer */
.site-footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Typewriter */
.cursor { display: inline-block; width: 2px; background: var(--accent); animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* Fade-in animation */
.section, .hero-text, .card, .project, .contact-panel {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s forwards;
}
@keyframes fadeInUp {
  100% { opacity: 1; transform: translateY(0); }
}

/* Mobile menu toggle */
.menu-toggle {
  display: none; /* shown at small widths */
  background: transparent;
  border: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
}
.menu-toggle:focus { outline: 2px solid var(--accent); border-radius: 8px; }
.hamburger {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--fg);
  position: relative;
}
.hamburger::before, .hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--fg);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

/* Responsive: collapse nav into toggle on small screens */
@media (max-width: 768px) {
  .header-grid { gap: 12px; }
  .nav { display: none; }
  .menu-toggle { display: flex; }

  /* hide header social icons on small screens (they can be placed in the mobile menu if desired) */
  .header-socials { display: none; }

  /* mobile nav social links styling */
  .mobile-nav-socials {
    display: flex;
    gap: 0.5rem;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid rgba(255,255,255,0.03);
  }
  .mobile-social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--fg);
  }
  .mobile-social:hover { color: var(--accent); transform: translateY(-2px); }

  /* When header has .nav-open, show mobile menu */
  .site-header.nav-open [id="primary-nav"], .site-header.nav-open .nav {
    display: flex;
  }

  /* Mobile nav appearance */
  #primary-nav {
    position: absolute;
    right: 16px;
    top: 72px;
    flex-direction: column;
    gap: 0.25rem;
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02));
    padding: 10px;
    min-width: 200px;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 6px 30px rgba(0,0,0,0.45);
    z-index: 1000;
  }
  #primary-nav a { display: block; padding: 10px 14px; margin: 0; color: var(--fg); }
  #primary-nav a.cta { background: var(--accent); color: white; border-radius: 8px; }

  /* Transform hamburger to X when open */
  .site-header.nav-open .hamburger { background: transparent; }
  .site-header.nav-open .hamburger::before { transform: translateY(7px) rotate(45deg); }
  .site-header.nav-open .hamburger::after { transform: translateY(-7px) rotate(-45deg); }
  .site-header.nav-open .hamburger::before, .site-header.nav-open .hamburger::after { background: var(--fg); }

  /* Slightly smaller hero heading on small screens */
  .hero h2 { font-size: 1.6rem; }
}

/* Theme toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-left: 8px;
  border-radius: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--fg);
  cursor: pointer;
}
.theme-toggle:hover { transform: translateY(-2px); color: var(--accent); }
.theme-toggle svg { display: block; }

/* Smooth color transitions for theme changes */
body, .site-header, .card, .project, .contact-panel {
  transition: background 280ms ease, color 280ms ease, border-color 280ms ease, box-shadow 280ms ease;
}

/* Theme toggle animations: sun <-> earth */
.theme-toggle { position: relative; overflow: visible; }
.theme-toggle .toggle-icons { position: relative; display: inline-block; width: 22px; height: 22px; }
.theme-toggle .icon { position: absolute; left: 0; top: 0; transform-origin: 50% 50%; transition: transform 420ms cubic-bezier(.2,.9,.3,1), opacity 420ms ease; }
.theme-toggle .sun { transform: translateY(0) scale(1) rotate(0deg); opacity: 1; filter: drop-shadow(0 2px 6px rgba(255,177,70,0.12)); }
.theme-toggle .earth { transform: translateY(-10px) scale(.7) rotate(-30deg); opacity: 0; }

/* when theme is light (day) show sun, when dark show earth */
.theme-toggle.is-light .sun { transform: translateY(0) scale(1) rotate(0deg); opacity: 1; }
.theme-toggle.is-light .earth { transform: translateY(8px) scale(.6) rotate(20deg); opacity: 0; }
.theme-toggle.is-dark .sun { transform: translateY(-18px) scale(.6) rotate(-20deg); opacity: 0; }
.theme-toggle.is-dark .earth { transform: translateY(0) scale(1) rotate(0deg); opacity: 1; }

/* Add a small orbit/glow animation to earth when appearing */
@keyframes earthOrbit {
  0% { transform: translateY(-6px) rotate(-10deg) scale(.8); }
  50% { transform: translateY(0) rotate(6deg) scale(1); }
  100% { transform: translateY(-2px) rotate(-4deg) scale(.98); }
}
.theme-toggle.is-dark .earth { animation: earthOrbit 900ms cubic-bezier(.2,.9,.3,1); }

/* Language selector styling */
.lang-select {
  position: relative;
  display: inline-block;
  margin-left: 10px;
}
.lang-select select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 8px 34px 8px 10px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  height: 40px;
  min-width: 56px;
}
.lang-select::after {
  content: "▾";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--fg);
  opacity: 0.85;
  font-size: 12px;
}
.lang-select select:focus { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Theme switch burst overlay (animated circular burst) */
.theme-anim {
  position: fixed;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%,-50%) scale(0);
  opacity: 0.95;
  z-index: 9999;
  transition: transform 620ms cubic-bezier(.2,.9,.3,1), opacity 620ms ease;
  mix-blend-mode: screen;
  will-change: transform, opacity;
}
.theme-anim.animate {
  transform: translate(-50%,-50%) scale(80);
  opacity: 0;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .theme-anim { display: none !important; transition: none !important; }
  .theme-toggle .earth, .theme-toggle .sun { transition: none !important; animation: none !important; }
}