/* ==========================================================================
   Theme tokens
   Bootstrap 5.3 already re-themes forms/alerts/modal/navbar-toggler/btn-close
   when [data-bs-theme="dark"] is set on <html> — we key our own tokens off
   the same attribute instead of inventing a second one.
   ========================================================================== */
:root {
  --accent: #6d28d9;
  --accent-2: #0891b2;
  --accent-gradient: linear-gradient(135deg, var(--accent), var(--accent-2));
  --accent-contrast: #ffffff;
  --surface: #ffffff;
  --shadow: 0 10px 30px -10px rgba(109, 40, 217, 0.18);
  --nav-height: 4.25rem;
  --font-heading: "Sora", system-ui, sans-serif;
}

[data-bs-theme="dark"] {
  --bs-body-bg: #0a0a0f;
  --accent: #a78bfa;
  --accent-2: #22d3ee;
  --accent-contrast: #0f1117;
  --surface: #14141c;
  --shadow: 0 10px 30px -10px rgba(167, 139, 250, 0.35);
}

/* ==========================================================================
   Base
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
}

section[id] {
  scroll-margin-top: var(--nav-height);
}

a {
  color: var(--accent);
}

/* ==========================================================================
   Nav
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1030;
  min-height: var(--nav-height);
  background-color: color-mix(in srgb, var(--bs-body-bg) 82%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--bs-border-color);
}

.site-nav .logo {
  height: 40px;
  width: auto;
}

.nav-link-custom {
  color: var(--bs-body-color);
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 0.9rem;
}

.nav-link-custom:hover {
  color: var(--accent);
}

.theme-toggle-btn {
  background: none;
  border: 1px solid var(--bs-border-color);
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--bs-body-color);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--bs-tertiary-bg);
  transform: rotate(15deg);
}

.theme-toggle-btn .fa-sun {
  display: none;
}

[data-bs-theme="dark"] .theme-toggle-btn .fa-sun {
  display: inline;
}

[data-bs-theme="dark"] .theme-toggle-btn .fa-moon {
  display: none;
}

/* ==========================================================================
   Buttons (custom accent variants — Bootstrap's .btn-primary bakes fixed hex
   colors at build time, so it doesn't react to --accent; these do)
   ========================================================================== */
.btn-accent,
.btn-outline-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: 0.65rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, filter 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  border: 1.5px solid transparent;
}

/* Solid fill stays flat --accent rather than the two-tone gradient: white
   button text over the lighter end of the gradient would fail contrast in
   light mode. The gradient is reserved for decorative/large-text surfaces
   (blobs, hero name, card accent strip) where that isn't a concern. */
.btn-accent {
  background-color: var(--accent);
  color: var(--accent-contrast);
}

.btn-accent:hover {
  filter: brightness(1.1);
  color: var(--accent-contrast);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--accent) 55%, transparent);
}

.btn-outline-accent {
  background: transparent;
  color: var(--bs-body-color);
  border-color: var(--bs-border-color);
}

.btn-outline-accent:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--accent) 35%, transparent);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 82vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
}

.hero__blob {
  position: absolute;
  border-radius: 50%;
  background: var(--accent-gradient);
  filter: blur(90px);
  opacity: 0.35;
  pointer-events: none;
}

[data-bs-theme="dark"] .hero__blob {
  opacity: 0.28;
}

.hero__blob--1 {
  width: 32rem;
  height: 32rem;
  top: -10rem;
  left: -8rem;
}

.hero__blob--2 {
  width: 26rem;
  height: 26rem;
  bottom: -12rem;
  right: -8rem;
}

.hero__blob--3 {
  width: 18rem;
  height: 18rem;
  top: 15%;
  left: 58%;
  opacity: 0.2;
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1;
  margin: 0;
}

.hero h1 .accent-text {
  color: var(--accent);
}

@supports (background-clip: text) or (-webkit-background-clip: text) {
  .hero h1 .accent-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }
}

.hero p.lead {
  max-width: 38rem;
  color: var(--bs-secondary-color);
  font-size: 1.15rem;
  margin: 0;
}

.hero__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ==========================================================================
   Section headings (shared by About / Projects / Skills / Contact)
   ========================================================================== */
.section-heading {
  text-align: center;
  margin-bottom: 2.25rem;
}

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

.section-heading .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
}

.section-heading h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0.25rem 0 0;
}

/* ==========================================================================
   About
   ========================================================================== */
.about-card {
  background-color: var(--surface);
  border: 1px solid var(--bs-border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.about-card img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
  width: 100%;
}

/* ==========================================================================
   Social links
   ========================================================================== */
.social-link {
  text-decoration: none;
  display: inline-block;
  margin: 0 10px;
}

.github-link i {
  font-size: 24px;
  color: #333;
  transition: color 0.3s ease;
}

[data-bs-theme="dark"] .github-link i {
  color: #e5e7eb;
}

.github-link:hover i {
  color: #6e5494;
}

.linkedin-link i {
  font-size: 24px;
  color: #0077b5;
  transition: color 0.3s ease;
}

.linkedin-link:hover i {
  color: #0a66c2;
}

.email-link i {
  font-size: 24px;
  color: #9a1e12;
  transition: color 0.3s ease;
}

.email-link:hover i {
  color: #ff2c07;
}

/* ==========================================================================
   Projects grid
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.project-card {
  position: relative;
  background-color: var(--surface);
  border: 1px solid var(--bs-border-color);
  border-radius: 1rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px -12px color-mix(in srgb, var(--accent) 45%, transparent);
}

.project-card__image-wrap {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--bs-tertiary-bg);
}

.project-card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.project-card:hover .project-card__image-wrap img {
  transform: scale(1.05);
}

.project-card__body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.6rem;
}

.project-card__title {
  font-size: 1.15rem;
  margin: 0;
}

.project-card__desc {
  color: var(--bs-secondary-color);
  font-size: 0.925rem;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.4rem;
}

.tech_tag {
  background-color: var(--bs-tertiary-bg);
  color: var(--bs-body-color);
  border: 1px solid var(--bs-border-color);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.project-card__actions {
  display: flex;
  gap: 0.6rem;
  padding: 0 1.25rem 1.25rem;
}

.project-card__actions .btn-accent,
.project-card__actions .btn-outline-accent {
  flex: 1;
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
}

/* ==========================================================================
   Skills
   ========================================================================== */
.skills-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.skill-chip {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background-color: var(--surface);
  border: 1px solid var(--bs-border-color);
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.skill-chip i {
  color: var(--accent);
  font-size: 1.1rem;
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact-card {
  background-color: var(--surface);
  border: 1px solid var(--bs-border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  padding: 2rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--accent) 25%, transparent);
}

/* ==========================================================================
   Project preview modal
   ========================================================================== */
#projectPreviewBody iframe {
  width: 100%;
  height: 70vh;
  border: 0;
  display: block;
}

#projectPreviewBody img {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background-color: var(--bs-tertiary-bg);
  display: block;
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 1.25rem;
  }
}
