/* ===== Custom Properties ===== */
:root {
  --accent: #00ff88;
  --bg: #050505;
  --bg-card: #0a0a0a;
  --bg-alt: #080808;
  --border: #f5f5f5;
  --text: #f5f5f5;
  --text-muted: #666666;
  --font-body: 'Space Mono', monospace;
  --font-heading: 'Montserrat', sans-serif;
  --font-size-base: 15px;
  --font-weight-heading: 700;
  --container-width: 1400px;
  --section-padding: 8rem;
  --border-radius: 0px;
  --card-gap: 0px;
  --hero-gradient-start: #050505;
  --hero-gradient-mid: #050505;
  --hero-gradient-end: #050505;
  --hero-min-height: 100vh;
  --heading-scale: 1;
  --nav-scrolled-bg: rgba(5, 5, 5, 0.95);
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
}

/* ===== Noise Texture Overlay ===== */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ===== Container ===== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s;
}

.nav-scrolled {
  background: var(--nav-scrolled-bg);
  backdrop-filter: blur(10px);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.25rem 2rem;
}

.nav-brand {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

.nav-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  font-family: var(--font-body);
}

/* Mobile nav */
.nav-links {
  display: none;
}

.nav-links.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--nav-scrolled-bg);
}

.nav-links.open a {
  padding: 1rem 2rem;
  border-bottom: 2px solid var(--border);
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: color 0.2s;
}

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

/* ===== Hero ===== */
.hero {
  min-height: var(--hero-min-height);
  display: flex;
  align-items: center;
  background: linear-gradient(
    135deg,
    var(--hero-gradient-start) 0%,
    var(--hero-gradient-mid) 50%,
    var(--hero-gradient-end) 100%
  );
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

.hero-content h1 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  text-transform: uppercase;
  font-size: calc(clamp(3rem, 12vw, 10rem) * var(--heading-scale));
  line-height: 0.9;
  margin-bottom: 2rem;
}

.hero-number {
  display: block;
  font-family: var(--font-body);
  font-style: normal;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 500px;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: transparent;
  color: var(--text);
  text-decoration: none;
  border: 2px solid var(--border);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  transition: background 0.3s, color 0.3s;
}

.btn:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

/* ===== Sections ===== */
.section {
  padding: var(--section-padding) 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-number {
  display: block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.section h2 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  text-transform: uppercase;
  font-size: calc(clamp(2rem, 5vw, 3.5rem) * var(--heading-scale));
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
}

.section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin-top: 1rem;
}

/* ===== About ===== */
.about-body {
  max-width: 500px;
  line-height: 1.8;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.about-img {
  max-width: 100%;
  border: 3px solid var(--border);
  border-radius: var(--border-radius);
  margin-top: 2rem;
}

/* ===== Project Grid ===== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--card-gap);
}

.project-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: border-color 0.3s;
}

.project-card:hover {
  border-color: var(--accent);
}

.project-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.1);
  transition: filter 0.4s;
}

.project-card:hover .project-img {
  filter: grayscale(0%);
}

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  text-transform: uppercase;
  font-size: calc(1.4rem * var(--heading-scale));
  margin-bottom: 0.75rem;
}

.project-info p {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.project-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
  transition: opacity 0.2s;
}

.project-link:hover {
  opacity: 0.7;
}

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 3rem;
  grid-column: 1 / -1;
  font-size: 0.85rem;
}

/* ===== Contact ===== */
.contact-subtitle {
  color: var(--text-muted);
  margin-bottom: 3rem;
  font-size: 0.85rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  max-width: 600px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  transition: padding-left 0.3s;
}

.contact-link:hover {
  padding-left: 1rem;
}

.contact-type {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  min-width: 80px;
}

.contact-label {
  font-family: var(--font-body);
  font-size: 0.85rem;
}

/* ===== Contact Form ===== */
.contact-form {
  max-width: 600px;
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border);
}

.contact-form-group {
  margin-bottom: 1.25rem;
}

.contact-form-group label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.contact-form-group input,
.contact-form-group textarea {
  width: 100%;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--border-radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 0.75rem 1rem;
  transition: border-color 0.2s;
}

.contact-form-group input:focus,
.contact-form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

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

.contact-form .hp {
  display: none;
}

.contact-form-msg {
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.contact-form-msg.success {
  color: var(--accent);
}

.contact-form-msg.error {
  color: #ef4444;
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 0;
  border-top: 3px solid var(--accent);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color 0.3s;
}

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

.footer p {
  font-family: var(--font-body);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* ===== Responsive (Desktop) ===== */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
  }
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--text-muted);
  color: var(--text);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0;
  line-height: 1;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}
/* Show sun in dark mode, moon in light */
[data-theme="dark"] .theme-toggle-icon::before { content: '\2600'; }
[data-theme="light"] .theme-toggle-icon::before { content: '\263E'; }

/* Smooth color transitions */
body,
.nav,
.hero,
.section,
.section-alt,
.project-card,
.footer,
.contact-link,
.btn {
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

/* ===== Responsive (Mobile) ===== */
@media (max-width: 767px) {
  .hero-content h1 {
    font-size: calc(clamp(2.5rem, 10vw, 5rem) * var(--heading-scale));
  }

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

  .section {
    padding: 4rem 0;
  }
}