/* ============================================================
   DESIGN SYSTEM — Guilherme Silva Portfolio
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,400;0,14..32,500;0,14..32,600;0,14..32,700;0,14..32,800;0,14..32,900;1,14..32,400&family=JetBrains+Mono:wght@400;500&display=swap");

/* ── 1. Design Tokens ──────────────────────────────────────── */
:root {
  /* Accent: near-black — clean, authoritative, zero color noise */
  --accent:         #18181b;
  --accent-light:   rgba(24, 24, 27, 0.07);
  --accent-hover:   #09090b;

  /* Surfaces — pure neutral, no blue cast */
  --bg:             #ffffff;
  --surface:        #f5f5f5;
  --surface-2:      #e5e5e5;
  --border:         rgba(0, 0, 0, 0.14);

  /* Text — high contrast for light mode */
  --text:           #09090b;
  --text-muted:     #52525b;
  --text-faint:     #71717a;

  /* Semantic badge colors — muted, functional */
  --green:          #15803d;
  --green-bg:       rgba(21, 128, 61, 0.07);
  --green-border:   rgba(21, 128, 61, 0.2);
  --blue:           #1d4ed8;
  --blue-bg:        rgba(29, 78, 216, 0.07);
  --blue-border:    rgba(29, 78, 216, 0.2);
  --amber:          #b45309;
  --amber-bg:       rgba(180, 83, 9, 0.07);
  --amber-border:   rgba(180, 83, 9, 0.2);

  --shadow-sm:      0 1px 3px rgba(0, 0, 0, 0.07);
  --shadow-md:      0 4px 20px rgba(0, 0, 0, 0.09);
  --shadow-lg:      0 16px 48px rgba(0, 0, 0, 0.14);

  --navbar-h:       4.25rem;
  --max-w:          68rem;
  --radius-s:       0.375rem;
  --radius-m:       0.625rem;
  --radius-l:       1rem;

  --font-body:      "Inter", sans-serif;
  --font-mono:      "JetBrains Mono", monospace;

  --t-fast:         0.15s ease;
  --t-normal:       0.25s ease;
  --t-slow:         0.4s ease;
}

[data-theme="dark"] {
  /* Accent: near-white on dark — crisp and clean */
  --accent:         #fafafa;
  --accent-light:   rgba(250, 250, 250, 0.07);
  --accent-hover:   #ffffff;

  /* Surfaces — true black, zero blue tint */
  --bg:             #0a0a0a;
  --surface:        #111111;
  --surface-2:      #1a1a1a;
  --border:         rgba(255, 255, 255, 0.09);

  /* Text */
  --text:           #fafafa;
  --text-muted:     #a1a1aa;
  --text-faint:     #52525b;

  /* Semantic badge colors — dark mode variants */
  --green:          #4ade80;
  --green-bg:       rgba(74, 222, 128, 0.08);
  --green-border:   rgba(74, 222, 128, 0.22);
  --blue:           #60a5fa;
  --blue-bg:        rgba(96, 165, 250, 0.08);
  --blue-border:    rgba(96, 165, 250, 0.22);
  --amber:          #fbbf24;
  --amber-bg:       rgba(251, 191, 36, 0.08);
  --amber-border:   rgba(251, 191, 36, 0.22);

  --shadow-sm:      0 1px 4px rgba(0, 0, 0, 0.4);
  --shadow-md:      0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg:      0 16px 48px rgba(0, 0, 0, 0.65);
}

/* ── 2. Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--t-normal), color var(--t-normal);
}

ul  { list-style: none; }
a   { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

::selection { background: var(--accent-light); color: var(--text); }

/* ── 3. Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar        { width: 6px; }
::-webkit-scrollbar-track  { background: var(--bg); }
::-webkit-scrollbar-thumb  { background: var(--accent); border-radius: 999px; }

/* ── 4. Layout ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  scroll-margin-top: var(--navbar-h);
}

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

.section__header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  display: inline-block;
  position: relative;
  padding-bottom: 0.65rem;
}

.section__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2.25rem;
  height: 3px;
  background: var(--accent);
  border-radius: 999px;
}

.section__sub {
  margin-top: 0.75rem;
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

/* Legacy — hide old dividers */
.division { display: none; }

/* ── 5. Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-s);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.025em;
  transition: all var(--t-normal);
  cursor: pointer;
  white-space: nowrap;
  border: 1.5px solid transparent;
}

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

.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.22);
}

.btn--outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn--sm { padding: 0.5rem 1.1rem; font-size: 0.82rem; }

/* Legacy btn aliases */
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-s);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.025em;
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
  transition: all var(--t-normal);
  cursor: pointer;
}

.download-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-container { margin-top: 0; }

/* ── 6. Navbar ─────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--navbar-h);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background var(--t-normal), border-color var(--t-normal), box-shadow var(--t-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

/* Logo */
.navbar__logo { display: flex; align-items: center; }

.logo-text {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
  transition: opacity var(--t-fast);
}

.navbar__logo:hover .logo-text { opacity: 0.75; }

/* ── Reload bar ──────────────────────────────────────────── */
.reload-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 9999;
  border-radius: 0 1px 1px 0;
  pointer-events: none;
  box-shadow: 0 0 6px var(--accent);
}
.reload-bar.run {
  animation: reload-sweep 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}
@keyframes reload-sweep {
  0%   { width: 0%;   opacity: 1; }
  75%  { width: 100%; opacity: 1; }
  100% { width: 100%; opacity: 0; }
}

.navbar__logo.reloading .logo-text {
  animation: logo-exit 0.5s ease forwards;
}
@keyframes logo-exit {
  0%   { transform: scale(1);    opacity: 1;   }
  50%  { transform: scale(1.12); opacity: 0.6; }
  100% { transform: scale(0.85); opacity: 0;   }
}

/* Nav items */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: 0.4rem 0.8rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  border-radius: var(--radius-s);
  transition: color var(--t-fast);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  transition: transform var(--t-normal);
}

.nav-link:hover       { color: var(--text); }
.nav-link.active      { color: var(--text); }
.nav-link:hover::after,
.nav-link.active::after { transform: translateX(-50%) scaleX(1); }

/* Controls */
.navbar__controls {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

/* Theme toggle */
#switch { display: none; }

.toggle-icons {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: var(--radius-s);
  transition: background var(--t-fast);
}

.toggle-icons:hover { background: var(--surface); }

.toggle-icons > img {
  width: 1.2rem;
  height: 1.2rem;
  transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.3s;
  opacity: 0.55;
}

#switch:checked + .toggle-icons .moon { transform: rotate(250deg); opacity: 1; }
#switch:checked + .toggle-icons .sun  { transform: rotate(100deg); opacity: 0.35; }

/* Language */
.language-selector { display: flex; align-items: center; }

.lang-dropdown { position: relative; }

.lang-btn {
  padding: 0.28rem 0.6rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast);
  min-width: 4.5rem;
  text-align: center;
}

.lang-btn:hover,
.lang-btn:focus {
  border-color: var(--accent);
  color: var(--text);
  outline: none;
}

.lang-options {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-s);
  list-style: none;
  padding: 0.2rem 0;
  margin: 0;
  min-width: 100%;
  z-index: 200;
  box-shadow: var(--shadow-md);
}

.lang-dropdown.open .lang-options { display: block; }

.lang-option {
  padding: 0.35rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  white-space: nowrap;
}

.lang-option:hover { background: var(--surface-2); color: var(--accent); }
.lang-option.active { color: var(--accent); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.35rem 0.25rem;
  cursor: pointer;
  border-radius: var(--radius-s);
}

.bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  transition: all 0.28s ease;
}

.hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 7. Hero ───────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  scroll-margin-top: var(--navbar-h);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--navbar-h) + 3rem) 1.5rem 5rem;
  position: relative;
  overflow: hidden;
  text-align: center;
}

/* Dot-grid background */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

/* Bottom fade */
.hero::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 10rem;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}

/* Alt background for section--alt */
.section--alt .hero::after {
  background: linear-gradient(to bottom, transparent, var(--surface));
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 42rem;
  width: 100%;
}

/* Avatar */
.hero__avatar, .profile-image {
  width: 7.5rem;
  height: 7.5rem;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  padding: 3px;
  background: var(--bg);
  animation: float 3.5s ease-in-out infinite;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 0 6px var(--accent-light);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

/* Label */
.hero__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

/* Name */
.hero__name {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

/* Legacy h1 inside .header-container */
.header-container h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 900; letter-spacing: -0.03em; }

.hero__name-accent { color: var(--accent); }
.dev               { color: var(--accent); }

/* Role */
.hero__role, .content-text {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  margin-top: 0.25rem;
  flex-wrap: wrap;
  text-align: center;
}

.content-text h2 {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  color: var(--text-muted);
  line-height: 1.2;
}

/* Stack pills */
.hero__stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  list-style: none;
}

.hero__stack li {
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* CTA */
.hero__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2rem;
}

/* Social */
.hero__social, .social-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__social a,
.social-buttons a {
  color: var(--text-muted);
  display: flex;
  transition: color var(--t-normal), transform var(--t-normal);
}

.hero__social a:hover,
.social-buttons a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.icon { color: currentColor; }

/* Scroll cue */
.hero__scroll {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll span {
  display: block;
  width: 1.5rem;
  height: 2.4rem;
  border: 2px solid var(--border);
  border-radius: 999px;
  position: relative;
  margin: 0 auto;
}

.hero__scroll span::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 7px;
  background: var(--accent);
  border-radius: 999px;
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  75%       { transform: translateX(-50%) translateY(11px); opacity: 0; }
}

/* Legacy .header-container */
.header-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: calc(var(--navbar-h) + 2rem) 1.5rem 4rem;
  text-align: center;
  position: relative;
}

.header-container > div { margin-top: 0.5rem; }

/* ── 8. About ──────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 4rem;
  align-items: start;
}

.about-image-wrap {
  position: relative;
  flex-shrink: 0;
}

.about-image-wrap::before {
  content: "";
  position: absolute;
  inset: -6px;
  border: 1.5px solid var(--accent-light);
  border-radius: var(--radius-l);
  pointer-events: none;
}

.about-img, .about-image {
  width: 100%;
  max-width: 340px;
  border-radius: var(--radius-m);
  object-fit: cover;
  aspect-ratio: 3/4;
  border: 1px solid var(--border);
}

/* Legacy about-container */
.about-container {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 4rem;
  align-items: start;
}

.about-photo-wrapper { position: relative; flex-shrink: 0; }

.about-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.about-content { display: flex; flex-direction: column; }

.about-bio {
  font-size: 1rem;
  line-height: 1.78;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.about-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.lang-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  color: var(--text);
  opacity: 0.9;
}

.about-label, .about-section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
  margin-top: 1.1rem;
}

.about-label:first-of-type, .about-section-label:first-of-type { margin-top: 0; }

.soft-chips, .soft-skills-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.soft-chip {
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-size: 0.77rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.soft-chip:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--text);
}

.about-aux {
  font-size: 0.875rem;
  color: var(--text-faint);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

/* ── 9. Skills ─────────────────────────────────────────────── */
.skills-container { }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.skill-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.75rem 1rem 1.5rem;
  border-radius: var(--radius-m);
  background: var(--bg);
  border: 1px solid var(--border);
  border-top: 2px solid transparent;
  transition: transform var(--t-normal), box-shadow var(--t-normal), border-top-color var(--t-normal);
}

[data-theme="dark"] .skill-card { background: var(--surface-2); }

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-top-color: var(--accent);
}

.skill-card-icon {
  width: 3.75rem;
  height: 3.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border-radius: 50%;
  margin-bottom: 0.875rem;
  transition: background var(--t-normal);
}

[data-theme="dark"] .skill-card-icon { background: var(--bg); }

.skill-card:hover .skill-card-icon { background: var(--accent-light); }

.skill-card-icon img,
.skill-card-icon svg {
  width: 2.1rem;
  height: 2.1rem;
  transition: transform var(--t-normal);
}

.skill-card:hover .skill-card-icon img,
.skill-card:hover .skill-card-icon svg { transform: scale(1.1); }

.skill-card-icon--spring svg,
.skill-card-icon--go svg,
.skill-card-icon--kotlin svg { width: 2.4rem; height: 2.4rem; }

.skill-card h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
  color: var(--text);
}

.skill-level {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
}

.level-adv {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}

.level-int {
  background: var(--blue-bg);
  color: var(--blue);
  border: 1px solid var(--blue-border);
}

.level-bas {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}

/* ── 10. Projects ──────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform var(--t-normal), box-shadow var(--t-normal);
}

[data-theme="dark"] .project-card { background: var(--surface); }

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.project-card-image {
  position: relative;
  width: 100%;
  height: 210px;
  overflow: hidden;
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow);
}

.project-card:hover .project-card-image img { transform: scale(1.06); }

.project-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--t-normal);
  backdrop-filter: blur(3px);
}

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

.project-card-links { display: flex; gap: 0.75rem; }

.project-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 1rem;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  border-radius: var(--radius-s);
  color: #fff !important;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(4px);
  transition: background var(--t-fast), border-color var(--t-fast);
}

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

.project-card-body {
  padding: 1.25rem 1.375rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-card-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.project-card-body p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: 1rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: auto;
}

.tag {
  padding: 0.17rem 0.6rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* Gradient cards */
.project-card-image--gradient {
  background: linear-gradient(135deg, #0f0c29 0%, #302b63 55%, #1a1535 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card-image--navy {
  background: linear-gradient(135deg, #0a1628 0%, #0f2d52 55%, #091a30 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-gradient-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 1;
}

.project-gradient-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

/* ── 11. Contact ───────────────────────────────────────────── */
#contact { text-align: center; }

.contact-container {
  padding: 0 0 2rem;
}

.contact-container h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.contact-container p {
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  font-size: 1rem;
}

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

.social-buttons a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-s);
  border: 1.5px solid var(--border);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--t-normal);
}

.social-buttons a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ── 12. Footer ────────────────────────────────────────────── */
#footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  gap: 1rem;
}

.footer__brand { text-align: left; }

.footer__copy {
  font-size: 0.75rem;
  color: var(--text-faint);
  text-align: center;
  white-space: nowrap;
}

.footer__social {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.footer__social a {
  color: var(--text-faint);
  display: flex;
  transition: color var(--t-fast);
}

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

/* Legacy footer inner — hide old structure */
#footer .social { display: none; }
#footer .container { min-height: unset; }

/* ── 13. Entrance Animations ───────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in:nth-child(2) { transition-delay: 0.07s; }
.fade-in:nth-child(3) { transition-delay: 0.14s; }
.fade-in:nth-child(4) { transition-delay: 0.21s; }
.fade-in:nth-child(5) { transition-delay: 0.28s; }
.fade-in:nth-child(6) { transition-delay: 0.35s; }
.fade-in:nth-child(7) { transition-delay: 0.42s; }
.fade-in:nth-child(8) { transition-delay: 0.49s; }

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

/* ── 14. Media Queries ─────────────────────────────────────── */
@media (max-width: 64rem) {
  .skills-grid     { grid-template-columns: repeat(2, 1fr); }
  .about-grid,
  .about-container { grid-template-columns: 280px 1fr; gap: 2.5rem; }
}

@media (max-width: 48rem) {
  .section { padding: 4rem 0; }

  .nav-menu {
    position: fixed;
    top: var(--navbar-h);
    right: 0;
    width: 75vw;
    max-width: 18rem;
    height: calc(100vh - var(--navbar-h));
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    background: var(--bg);
    border-left: 1px solid var(--border);
    padding: 1.5rem 1rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 99;
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
  }

  .nav-menu.active { transform: translateX(0); }

  .nav-menu li { width: 100%; }

  .nav-link {
    display: block;
    padding: 0.8rem 0.5rem;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-link::after { display: none; }

  .hamburger { display: flex; }

  .hero__actions { flex-direction: column; align-items: center; }

  .about-grid,
  .about-container { grid-template-columns: 1fr; gap: 2rem; }

  .about-image-wrap,
  .about-photo-wrapper { max-width: 18rem; margin: 0 auto; }

  .about-image, .about-img { max-width: 100%; aspect-ratio: 1/1; }

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

  .section__title { font-size: 1.75rem; }

  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 0.5rem;
  }

  .footer__brand  { text-align: center; }
  .footer__social { justify-content: center; }
}

@media (max-width: 30rem) {
  .hero__stack li { font-size: 0.68rem; padding: 0.25rem 0.65rem; }
  .skills-grid    { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .skill-card     { padding: 1.25rem 0.75rem 1.1rem; }
}