:root {
  --bg: #020617;
  --bg-elevated: #020617;
  --bg-card: #020617;
  --bg-card-soft: #020617;
  --border-subtle: rgba(148, 163, 184, 0.25);
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --accent-strong: rgba(56, 189, 248, 0.24);
  --text: #e5e7eb;
  --text-soft: #9ca3af;
  --text-muted: #6b7280;
  --pill-bg: rgba(148, 163, 184, 0.12);
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --shadow-subtle: 0 10px 30px rgba(15, 23, 42, 0.9);
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-pill: 999px;
  --nav-blur-bg: rgba(15, 23, 42, 0.8);
  --ring-focus: 0 0 0 1px #38bdf8, 0 0 0 6px rgba(56, 189, 248, 0.25);
}

:root[data-theme="light"] {
  --bg: #f8fafc;
  --bg-elevated: #f9fafb;
  --bg-card: #ffffff;
  --bg-card-soft: #f1f5f9;
  --border-subtle: rgba(148, 163, 184, 0.45);
  --accent: #0ea5e9;
  --accent-soft: rgba(14, 165, 233, 0.12);
  --accent-strong: rgba(14, 165, 233, 0.16);
  --text: #0f172a;
  --text-soft: #334155;
  --text-muted: #64748b;
  --pill-bg: rgba(148, 163, 184, 0.16);
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.14);
  --shadow-subtle: 0 12px 35px rgba(15, 23, 42, 0.08);
  --nav-blur-bg: rgba(248, 250, 252, 0.9);
  --ring-focus: 0 0 0 1px #0ea5e9, 0 0 0 6px rgba(14, 165, 233, 0.25);
}

/* =========
   BASE STYLES
   ========= */
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #0b1120 0, var(--bg) 52%);
  color: var(--text);
  min-height: 100vh;
}

:root[data-theme="light"] body {
  background: radial-gradient(circle at top, #e5f0ff 0, var(--bg) 55%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.12) 0, transparent 60%),
    radial-gradient(circle at 100% 0%, rgba(129, 140, 248, 0.12) 0, transparent 55%);
  opacity: 0.85;
  mix-blend-mode: screen;
  z-index: -2;
}

body,
button,
a {
  transition:
    background-color 0.24s ease,
    color 0.24s ease,
    border-color 0.24s ease,
    box-shadow 0.24s ease,
    transform 0.12s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* =========
   LAYOUT
   ========= */
.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 5px 16px 40px;
}

/* =========
   TOP NAV
   ========= */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    var(--nav-blur-bg),
    transparent 95%
  );
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 10px 16px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.nav-logo {
  width: 30px;
  height: 30px;
  border-radius: 40%;
  background: radial-gradient(circle at 30% 20%, #38bdf8, #818cf8 55%, #0f172a);
  box-shadow:
    0 0 0 3px rgba(15, 23, 42, 0.75),
    0 18px 35px rgba(15, 23, 42, 0.9);
}

.nav-title {
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 0.92rem;
  text-transform: uppercase;
  color: var(--text-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* =========
   BUTTONS
   ========= */
.btn {
  border-radius: 999px;
  padding: 6px 14px;
  border: 1px solid transparent;
  font-size: 0.85rem;
  line-height: 1.1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  background: var(--bg-card-soft);
  color: var(--text);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.5);
}

.btn span.icon {
  font-size: 1rem;
}

.btn-primary {
  background: radial-gradient(circle at 0 0, #22c55e 0, #0ea5e9 45%, #4f46e5 100%);
  color: #ecfeff;
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 18px 45px rgba(8, 47, 73, 0.9);
}

.btn-outline {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.4);
  color: var(--text-soft);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-subtle);
}


/* ===== Desktop nav underline sweep animation (desktop only) ===== */
.nav-links--desktop a {
  position: relative;
  padding-bottom: 3px;
  padding-right: 6px;
  color: var(--text-muted);
}

.nav-links--desktop a:hover,
.nav-links--desktop a:focus-visible {
  color: var(--text);
}

.nav-links--desktop a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 1px;
  background: linear-gradient(90deg, #38bdf8, #22c55e);
  transition: width 0.2s ease;
}

.nav-links--desktop a:hover::after,
.nav-links--desktop a:focus-visible::after {
  width: 100%;
}
#mobile-nav { display: none; }

@media (max-width: 767px) {
  .nav-links--desktop { display: none; }
  #mobile-nav { display: flex; }
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--ring-focus);
}

.btn-toggle {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: radial-gradient(circle at 30% 0, rgba(56, 189, 248, 0.35), transparent 60%);
  font-size: 0.9rem;
  box-shadow: 0 16px 35px rgba(15, 23, 42, 0.85);
}

.btn-toggle span {
  display: inline-block;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* =========
   HERO / HEADER
   ========= */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 3fr);
  margin-top: 15px;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 3fr) minmax(260px, 2.2fr);
    gap: 28px;
    align-items: flex-start;
  }
}

.hero-main {
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.25), transparent 55%),
    linear-gradient(to bottom right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.75));
  border-radius: 24px;
  padding: 22px 20px 20px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  box-shadow: 0 26px 60px rgba(15, 23, 42, 0.9);
  position: relative;
  overflow: hidden;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: var(--text-soft);
}

.pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.35);
}

.pill-tag {
  background: rgba(15, 23, 42, 0.75);
  border-color: rgba(148, 163, 184, 0.45);
}

.hero-name {
  font-size: clamp(1.9rem, 3vw, 2.35rem);
  line-height: 1.12;
  font-weight: 650;
  letter-spacing: 0.02em;
  margin: 0 0 6px;
  color: #e5e7eb;
}

.hero-subtitle {
  font-size: 0.96rem;
  color: var(--text-soft);
  margin-bottom: 14px;
}

.hero-summary {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 42rem;
  margin-bottom: 18px;
}

.hero-summary strong {
  color: #e5e7eb;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.hero-meta-bullet {
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: #64748b;
}

/* Right column: quick stats & contact */
.hero-aside {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  background: linear-gradient(
      to bottom,
      rgba(15, 23, 42, 0.96),
      rgba(15, 23, 42, 0.96)
    ),
    radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.16), transparent 55%);
  backdrop-filter: blur(10px);
  padding: 14px 13px 13px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.9);
}

:root[data-theme="light"] .card {
  background: linear-gradient(to bottom, var(--bg-card), var(--bg-card-soft));
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.16);
}

:root[data-theme="light"] .hero-main {
  background:
    radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.12), transparent 55%),
    linear-gradient(to bottom right, var(--bg-card), var(--bg-card-soft));
  border-color: rgba(148, 163, 184, 0.55);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.16);
}

/* Light-mode overrides for hero + pills */
:root[data-theme="light"] .hero-name {
  color: var(--text);            /* dark text */
}

:root[data-theme="light"] .hero-summary strong {
  color: var(--text);            /* emphasised but still dark */
}

:root[data-theme="light"] .pill,
:root[data-theme="light"] .pill-tag,
:root[data-theme="light"] .hero-meta-item {
  background: var(--bg-card-soft);
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--text-soft);
}

:root[data-theme="light"] .hero-meta-bullet {
  background: #94a3b8;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.card-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.card-badge {
  font-size: 0.7rem;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.4);
  background: rgba(15, 23, 42, 0.9);
  color: #e0f2fe;
}

/* ----------------------------- */
/* Light mode overrides for cards */
/* ----------------------------- */

:root[data-theme="light"] .card-badge {
  background: var(--bg-card-soft);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.5);
}

:root[data-theme="light"] .card-link {
  background: var(--bg-card-soft);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.4);
}

:root[data-theme="light"] .card-link:hover {
  background: var(--bg-card);
}

:root[data-theme="light"] .chip,
:root[data-theme="light"] .tag {
  background: var(--pill-bg);
  color: var(--text-soft);
  border-color: rgba(148, 163, 184, 0.35);
}

.card-body {
  font-size: 0.86rem;
  color: var(--text-soft);
}

.inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 9px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  background: var(--pill-bg);
  border: 1px solid rgba(148, 163, 184, 0.35);
  color: var(--text-muted);
}

.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #38bdf8;
  opacity: 0.9;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  font-size: 0.8rem;
}

.card-link {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.85);
  color: var(--text-soft);
}

/* =========
   SECTION WRAPPER
   ========= */
.section {
  margin-top: 28px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 10px;
}

.section-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.section-divider {
  height: 1px;
  flex: 1;
  background: linear-gradient(to right, rgba(148, 163, 184, 0.7), transparent);
}

.section-subtitle {
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* =========
   PROJECTS GRID
   ========= */
.grid {
  display: grid;
  gap: 14px;
}

@media (min-width: 800px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.project-card {
  border-radius: 20px;
  padding: 12px 12px 11px;
  background: radial-gradient(circle at 0 0, var(--accent-soft), transparent 60%),
    linear-gradient(to bottom right, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.96));
  border: 1px solid var(--border-subtle);
  box-shadow: 0 20px 55px rgba(15, 23, 42, 0.9);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

:root[data-theme="light"] .project-card {
  background: linear-gradient(to bottom right, var(--bg-card), var(--bg-card-soft));
  box-shadow: 0 16px 45px rgba(15, 23, 42, 0.14);
}

.project-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.project-title {
  font-size: 0.98rem;
  font-weight: 550;
}

.project-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.project-desc {
  font-size: 0.84rem;
  color: var(--text-soft);
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
  gap: 8px;
  font-size: 0.8rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tag {
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: var(--text-muted);
}

:root[data-theme="light"] .tag {
  background: var(--pill-bg);
}

.project-links {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.45);
  font-size: 0.75rem;
  color: var(--text-soft);
}

.project-link span.icon {
  font-size: 0.8rem;
}

/* =========
   TIMELINE (EXPERIENCE / EDUCATION)
   ========= */
.timeline {
  position: relative;
  padding-left: 14px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(to bottom, rgba(148, 163, 184, 0.7), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 14px;
  padding-bottom: 14px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -1.6px;
  top: 3px;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #38bdf8;
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.35);
}

.timeline-role {
  font-size: 0.9rem;
  font-weight: 540;
}

.timeline-org {
  font-size: 0.84rem;
  color: var(--text-soft);
}

.timeline-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 3px;
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* =========
   SKILLS
   ========= */
.skills-grid {
  display: grid;
  gap: 10px;
}

@media (min-width: 680px) {
  .skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.skills-group {
  border-radius: 18px;
  padding: 10px 10px 9px;
  background: linear-gradient(to bottom right, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.95));
  border: 1px solid var(--border-subtle);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.9);
  font-size: 0.82rem;
}

:root[data-theme="light"] .skills-group {
  background: linear-gradient(to bottom right, var(--bg-card), var(--bg-card-soft));
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

.skills-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.skills-tag {
  font-size: 0.73rem;
  padding: 3px 7px;
  border-radius: 999px;
  background: var(--pill-bg);
  border: 1px solid rgba(148, 163, 184, 0.35);
  color: var(--text-soft);
}

/* =========
   FOOTER
   ========= */
footer {
  margin-top: 26px;
  padding-top: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid rgba(148, 163, 184, 0.3);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-links a {
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

/* UTILITIES */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 480px) {
  .nav-links {
    font-size: 0.8rem;
    gap: 12px;
  }
  .hero-aside {
      padding-top: 10px;
  }
}

/* Mobile menu button (hidden on desktop) */
.nav-menu-toggle {
  border-radius: 999px;
  padding: 0 10px;
  height: 32px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: var(--bg-card-soft);
  color: var(--text);
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Base nav-links: desktop-ish defaults */
.nav-links a {
  position: relative;
  padding-bottom: 3px;
}

/* ===== Mobile FAB menu ===== */
@media (max-width: 767px) {
  /* Hide the inline nav links in the header area (we'll use the popover instead) */
  .nav-links {
    position: fixed;
    right: 18px;
    bottom: 86px;
    left: auto;
    top: auto;
    z-index: 999;

    width: min(260px, calc(100vw - 36px));
    display: flex;
    flex-direction: column;
    gap: 8px;

    padding: 10px;
    border-radius: 16px;

    background: var(--nav-blur-bg);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: var(--shadow-soft);

    /* animation */
    max-height: 0;
    opacity: 0;
    transform: translateY(10px) scale(0.98);
    overflow: hidden;
    pointer-events: none;
    transition:
      max-height 0.25s ease,
      opacity 0.2s ease,
      transform 0.25s ease;
  }

  .nav-links.nav--open {
    max-height: 320px;
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }

  .nav-links a {
    padding: 10px 10px;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(148, 163, 184, 0.08);
  }

  .nav-links a:active {
    transform: translateY(1px);
  }

  .nav-menu-toggle {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 1000;

    width: 52px;
    height: 52px;
    padding: 0;

    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    background: var(--bg-card-soft);
    color: var(--text);
    font-size: 1.2rem;
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    
    /* Make sure it's above everything */
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* ===== Desktop stays as normal top nav ===== */
@media (min-width: 768px) {
  .nav-menu-toggle {
    display: none;
    position: static;
    width: auto;
    height: auto;
  }

  .nav-links {
    position: static;
    display: flex;
    flex-direction: row;
    gap: 20px;

    width: auto;
    padding: 0;
    border: none;
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;

    max-height: none;
    opacity: 1;
    transform: none;
    overflow: visible;
    pointer-events: auto;
  }

  .nav-links a {
    padding: 0;
    border: none;
    background: transparent;
  }
}

/* ===== Section highlight after navigation ===== */
.section-highlight {
  position: relative;
}

.section-highlight::before {
  content: "";
  position: absolute;
  inset: -6px -10px;
  background: rgba(163, 230, 53, 0.35); /* lime green */
  border-radius: 6px;
  z-index: -1;
  animation: highlight-fade 2s ease-out forwards;
}

@keyframes highlight-fade {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}