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

:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-border: #2a2d3a;
  --color-accent: #6c63ff;
  --color-accent-hover: #857dff;
  --color-text: #e2e8f0;
  --color-text-muted: #8892a4;
  --font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;
  --max-width: 860px;
  --section-gap: 6rem;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
}

/* ===========================
   Nav
=========================== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--color-text);
}

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

/* ===========================
   Sections
=========================== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
  border-bottom: 1px solid var(--color-border);
}

section:last-of-type {
  border-bottom: none;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

p {
  color: var(--color-text-muted);
}

/* ===========================
   Hero
=========================== */
#hero {
  padding-top: 5rem;
}

.tagline {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.intro {
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 2rem;
}

/* ===========================
   Buttons
=========================== */
.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
}

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

.btn-secondary {
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
  background: transparent;
}

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

.btn-small {
  padding: 0.45rem 1rem;
  font-size: 0.82rem;
  border: 1.5px solid var(--color-border);
  color: var(--color-text-muted);
  background: transparent;
  border-radius: 5px;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}

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

/* ===========================
   Projects
=========================== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s;
}

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

.project-card.placeholder {
  opacity: 0.65;
}

/* ===========================
   Contact
=========================== */
.contact-link {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1.05rem;
}

.contact-link:hover {
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}

.social-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

/* ===========================
   Page hero (inner pages)
=========================== */
.page-hero {
  padding-top: 4rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  margin-bottom: 0.5rem;
}

/* ===========================
   Skills tags
=========================== */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.tag {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

/* ===========================
   Contact block
=========================== */
.contact-block {
  margin: 1.5rem 0 1rem;
}

/* ===========================
   Photography grid
=========================== */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.photo-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 8px;
  display: block;
  transition: opacity 0.2s;
}

.photo-item img:hover {
  opacity: 0.85;
}

.photo-placeholder-box {
  width: 100%;
  height: 220px;
  background-color: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ===========================
   Footer
=========================== */
footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 600px) {
  nav ul {
    gap: 1.2rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
}