/* =====================================================
   MARWAN KHALED — PORTFOLIO CSS
   Visual Identity: BLACK + OCEAN BLUE
   70% Black / Dark Backgrounds
   20% White / Gray Typography
   10% Ocean Blue Accent
   ===================================================== */

/* ---- CSS CUSTOM PROPERTIES ---- */
:root {
  /* Backgrounds */
  --bg-primary: #030507;
  --bg-secondary: #05090D;
  --bg-tertiary: #071018;

  /* Ocean Blue Accents */
  --ocean-primary: #00AEEF;
  --ocean-bright: #00C8FF;
  --ocean-deep: #0077B6;
  --ocean-dark: #004E7C;
  --ocean-soft: #38D9FF;

  /* Text */
  --text-heading: #F5F7FA;
  --text-body: #8B98A8;
  --text-muted: #586575;

  /* Borders */
  --border-subtle: rgba(0, 174, 239, 0.08);
  --border-card: rgba(0, 174, 239, 0.12);
  --border-hover: rgba(0, 174, 239, 0.35);

  /* Glows */
  --glow-sm: 0 0 20px rgba(0, 174, 239, 0.12);
  --glow-md: 0 0 40px rgba(0, 174, 239, 0.18);
  --glow-lg: 0 0 80px rgba(0, 174, 239, 0.22);
  --glow-xl: 0 0 120px rgba(0, 174, 239, 0.28);

  /* Gradients */
  --gradient-ocean: linear-gradient(135deg, #00C8FF, #0096D6, #0067A3);
  --gradient-ocean-2: linear-gradient(135deg, #38D9FF, #00AEEF, #0077B6);
  --gradient-hero-name: linear-gradient(90deg, #00C8FF, #38D9FF, #00AEEF, #00C8FF);

  /* Typography */
  --font-sans: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --section-padding: 120px 0;
  --container-max: 1240px;
  --nav-height: 72px;

  /* Transitions */
  --trans-fast: 0.2s ease;
  --trans-med: 0.35s ease;
  --trans-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---- RESET & BASE ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-body);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  cursor: none;
}

@media (hover: none) {
  body {
    cursor: auto;
  }
}

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

ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
input, textarea, button { font-family: inherit; font-size: inherit; }

/* ---- CUSTOM CURSOR ---- */
#cursor-dot,
#cursor-ring {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 10000;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
}

#cursor-dot {
  width: 7px;
  height: 7px;
  background: var(--ocean-bright);
  box-shadow: 0 0 10px var(--ocean-bright), 0 0 20px rgba(0, 200, 255, 0.5);
  transition: width 0.2s ease, height 0.2s ease, background 0.2s ease;
}

#cursor-ring {
  width: 34px;
  height: 34px;
  border: 1.5px solid rgba(0, 174, 239, 0.55);
  background: transparent;
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              height 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.35s ease,
              box-shadow 0.35s ease;
}

#cursor-ring.cursor-hover {
  width: 54px;
  height: 54px;
  border-color: var(--ocean-bright);
  box-shadow: 0 0 20px rgba(0, 174, 239, 0.3);
}

#cursor-spotlight {
  position: fixed;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 174, 239, 0.04) 0%, transparent 70%);
  transition: opacity 0.3s ease;
}

/* ---- CANVAS ---- */
#particle-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
}

/* ---- GRAIN OVERLAY ---- */
#grain-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.025;
  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");
  animation: grain-anim 0.4s steps(1) infinite;
}

@keyframes grain-anim {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-2px, 1px); }
  40%  { transform: translate(1px, -2px); }
  60%  { transform: translate(-1px, 1px); }
  80%  { transform: translate(2px, -1px); }
  100% { transform: translate(0, 0); }
}

/* ---- LAYOUT UTILITIES ---- */
.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
  position: relative;
  z-index: 2;
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.text-ocean {
  background: var(--gradient-hero-name);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: ocean-gradient-flow 5s linear infinite;
}

@keyframes ocean-gradient-flow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.text-center { text-align: center; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  transition: transform var(--trans-med), box-shadow var(--trans-med), background var(--trans-med), border-color var(--trans-med), color var(--trans-med);
  position: relative;
  overflow: hidden;
  cursor: none;
  border: none;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
  border-radius: 6px;
}

.btn-primary {
  background: var(--gradient-ocean);
  color: #030507;
  box-shadow: 0 0 24px rgba(0, 174, 239, 0.22), 0 4px 16px rgba(0, 0, 0, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(0, 174, 239, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);
}

.btn-primary svg {
  transition: transform var(--trans-fast);
}

.btn-primary:hover svg {
  transform: translateX(4px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-heading);
  border: 1.5px solid rgba(0, 174, 239, 0.3);
}

.btn-secondary:hover {
  border-color: var(--ocean-primary);
  background: rgba(0, 174, 239, 0.06);
  color: var(--ocean-bright);
  transform: translateY(-2px);
}

/* ---- SECTION LABELS ---- */
.section-label {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ocean-primary);
  letter-spacing: 0.08em;
}

.section-line {
  height: 1px;
  width: 48px;
  background: linear-gradient(to right, var(--ocean-primary), transparent);
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.section-title {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.15;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-body);
  max-width: 640px;
  margin: 0 auto 60px;
  line-height: 1.7;
}

.text-center.section-subtitle {
  text-align: center;
}

/* ---- REVEAL ANIMATIONS ---- */
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.revealed {
  opacity: 1 !important;
  transform: translate(0, 0) !important;
}

/* =====================================================
   NAVIGATION
   ===================================================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--trans-med), backdrop-filter var(--trans-med), box-shadow var(--trans-med), border-color var(--trans-med);
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: rgba(3, 5, 7, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0, 174, 239, 0.08);
  border-bottom-color: rgba(0, 174, 239, 0.07);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--text-heading);
}

.logo-mk {
  color: var(--ocean-primary);
}

.logo-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ocean-bright);
  box-shadow: 0 0 10px var(--ocean-bright);
  animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: auto;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-body);
  letter-spacing: 0.02em;
  position: relative;
  transition: color var(--trans-fast);
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1.5px;
  background: var(--gradient-ocean);
  transition: width var(--trans-med);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-heading);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  margin-left: 8px;
  padding: 9px 20px;
  font-size: 0.85rem;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: transparent;
  border: 1px solid var(--border-card);
  border-radius: 6px;
  cursor: none;
  transition: border-color var(--trans-fast);
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-heading);
  border-radius: 2px;
  transition: transform var(--trans-med), opacity var(--trans-fast);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  background: rgba(3, 5, 7, 0.96);
  backdrop-filter: blur(24px);
  border-top: 1px solid var(--border-card);
  padding: 20px clamp(20px, 5vw, 80px);
  transform: translateY(-10px);
  opacity: 0;
  transition: transform var(--trans-med), opacity var(--trans-med);
  pointer-events: none;
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-link {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-subtle);
  transition: color var(--trans-fast), padding-left var(--trans-fast);
}

.mobile-nav-link:hover {
  color: var(--ocean-primary);
  padding-left: 8px;
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero-section {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 60px;
  padding: calc(var(--nav-height) + 20px) clamp(20px, 5vw, 80px) 60px;
  max-width: var(--container-max);
  margin: 0 auto;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: 10%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 174, 239, 0.06) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
  animation: glow-drift 12s ease-in-out infinite alternate;
}

@keyframes glow-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, 40px) scale(1.15); }
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 174, 239, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 174, 239, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(0, 174, 239, 0.06);
  border: 1px solid rgba(0, 174, 239, 0.2);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ocean-primary);
  letter-spacing: 0.03em;
  margin-bottom: 30px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 8px #22C55E;
  animation: dot-pulse 2s ease-in-out infinite;
}

.hero-name {
  font-family: var(--font-sans);
  font-size: clamp(3.8rem, 8vw, 7.5rem);
  font-weight: 900;
  line-height: 0.88;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.name-first {
  color: var(--text-heading);
  display: block;
  line-height: 0.9;
}

.name-last {
  display: block;
  line-height: 0.9;
  background: var(--gradient-hero-name);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: ocean-gradient-flow 5s linear infinite;
  filter: drop-shadow(0 0 30px rgba(0, 200, 255, 0.35));
}

.hero-role {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 1.05rem;
  font-weight: 500;
  flex-wrap: wrap;
}

.role-prefix {
  color: var(--text-body);
}

.role-typed-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.role-typed {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ocean-primary);
}

.typed-cursor {
  font-family: var(--font-mono);
  color: var(--ocean-bright);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
}

.stat-item {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.stat-number {
  font-family: var(--font-sans);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-heading);
  font-variant-numeric: tabular-nums;
}

.stat-plus {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ocean-primary);
  margin-right: 8px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  align-self: center;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, transparent, var(--border-card), transparent);
}

/* HERO VISUAL — Neural Net Orb */
.hero-visual {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-orb-wrapper {
  position: relative;
  width: 380px;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
}

.hero-orb-1 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(0, 78, 124, 0.5) 0%, rgba(0, 119, 182, 0.2) 40%, transparent 70%);
  animation: orb-breathe 5s ease-in-out infinite;
}

.hero-orb-2 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(0, 174, 239, 0.18) 0%, transparent 70%);
  animation: orb-breathe 5s ease-in-out infinite 1.5s;
}

.hero-orb-3 {
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(56, 217, 255, 0.15) 0%, transparent 70%);
  animation: orb-breathe 5s ease-in-out infinite 3s;
}

@keyframes orb-breathe {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.08); opacity: 1; }
}

.hero-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0, 174, 239, 0.15);
}

.hero-ring-1 {
  width: 320px;
  height: 320px;
  animation: ring-rotate 20s linear infinite;
  border-color: rgba(0, 174, 239, 0.1);
  border-style: dashed;
}

.hero-ring-2 {
  width: 360px;
  height: 360px;
  animation: ring-rotate 30s linear infinite reverse;
  border-color: rgba(56, 217, 255, 0.08);
}

.hero-ring-3 {
  width: 400px;
  height: 400px;
  animation: ring-rotate 40s linear infinite;
  border-color: rgba(0, 174, 239, 0.05);
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.hero-center-dot {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ocean-bright);
  box-shadow: 0 0 30px rgba(0, 200, 255, 0.7), 0 0 60px rgba(0, 174, 239, 0.4);
  z-index: 4;
  animation: center-pulse 3s ease-in-out infinite;
}

@keyframes center-pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 30px rgba(0, 200, 255, 0.7), 0 0 60px rgba(0, 174, 239, 0.4); }
  50% { transform: scale(1.3); box-shadow: 0 0 50px rgba(0, 200, 255, 0.9), 0 0 100px rgba(0, 174, 239, 0.6); }
}

#hero-neural-net {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 3;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--ocean-primary), transparent);
  animation: scroll-line-anim 2s ease-in-out infinite;
}

@keyframes scroll-line-anim {
  0%, 100% { opacity: 0.5; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.15); }
}

.hero-scroll-hint span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* =====================================================
   ABOUT SECTION
   ===================================================== */
.about-section {
  background: var(--bg-secondary);
  position: relative;
}

.about-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 80% 50%, rgba(0, 174, 239, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 70px;
  align-items: center;
}

.about-text .section-title {
  margin-bottom: 24px;
}

.about-desc {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 18px;
}

.about-education-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  margin: 24px 0 20px;
}

.edu-icon {
  width: 42px;
  height: 42px;
  background: rgba(0, 174, 239, 0.08);
  border: 1px solid rgba(0, 174, 239, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ocean-primary);
  flex-shrink: 0;
}

.edu-icon svg { width: 22px; height: 22px; }

.edu-degree {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 2px;
}

.edu-school {
  font-size: 0.82rem;
  color: var(--ocean-primary);
  font-family: var(--font-mono);
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.tag {
  padding: 6px 14px;
  background: rgba(0, 174, 239, 0.06);
  border: 1px solid rgba(0, 174, 239, 0.15);
  border-radius: 100px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--ocean-primary);
  letter-spacing: 0.03em;
  transition: background var(--trans-fast), border-color var(--trans-fast), color var(--trans-fast);
}

.tag:hover {
  background: rgba(0, 174, 239, 0.12);
  border-color: rgba(0, 174, 239, 0.4);
  color: var(--ocean-bright);
}

/* About Card */
.about-card-wrapper {
  display: flex;
  justify-content: center;
}

.about-glow-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 36px 30px;
  width: 340px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  box-shadow: var(--glow-sm);
  transition: box-shadow var(--trans-med), border-color var(--trans-med), transform var(--trans-med);
}

.about-glow-card:hover {
  box-shadow: var(--glow-md);
  border-color: rgba(0, 174, 239, 0.3);
  transform: translateY(-6px);
}

.about-avatar-frame {
  position: relative;
}

.about-avatar-wrapper {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 2.5px solid var(--ocean-primary);
  box-shadow: 0 0 30px rgba(0, 174, 239, 0.35), 0 0 60px rgba(0, 174, 239, 0.15);
  background: var(--bg-tertiary);
  transition: transform var(--trans-med), border-color var(--trans-med), box-shadow var(--trans-med);
}

.about-glow-card:hover .about-avatar-img {
  border-color: var(--ocean-bright);
  box-shadow: 0 0 45px rgba(0, 200, 255, 0.5), 0 0 80px rgba(0, 174, 239, 0.25);
  transform: scale(1.03);
}

.avatar-pulse-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid rgba(0, 174, 239, 0.25);
  animation: avatar-pulse 3s ease-in-out infinite;
  pointer-events: none;
}

.avatar-pulse-ring-2 {
  inset: -16px;
  border-color: rgba(0, 174, 239, 0.12);
  animation-delay: 1.5s;
}

@keyframes avatar-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.04); opacity: 0.5; }
}

.about-card-info {
  text-align: center;
}

.about-card-name {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 4px;
}

.about-card-role {
  font-size: 0.85rem;
  color: var(--ocean-primary);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}

.about-card-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 8px #22C55E;
  animation: dot-pulse 2s ease-in-out infinite;
}

.about-card-metrics {
  display: flex;
  gap: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  width: 100%;
  justify-content: center;
}

.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.metric-value {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-heading);
}

.metric-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.about-card-contacts {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.card-contact-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(0, 174, 239, 0.04);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--text-body);
  font-family: var(--font-mono);
  transition: all var(--trans-fast);
}

.card-contact-pill svg {
  width: 14px;
  height: 14px;
  color: var(--ocean-primary);
  flex-shrink: 0;
}

.card-contact-pill:hover {
  background: rgba(0, 174, 239, 0.1);
  border-color: rgba(0, 174, 239, 0.35);
  color: var(--ocean-bright);
}

/* =====================================================
   SKILLS SECTION
   ===================================================== */
.skills-section {
  background: var(--bg-primary);
  position: relative;
}

.skills-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 50% at 50% 100%, rgba(0, 174, 239, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.skills-categories {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.skill-category {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 28px 32px;
  transition: border-color var(--trans-med), box-shadow var(--trans-med), transform var(--trans-med);
}

.skill-category:hover {
  border-color: rgba(0, 174, 239, 0.28);
  box-shadow: var(--glow-sm);
  transform: translateY(-3px);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.skill-cat-icon {
  width: 38px;
  height: 38px;
  background: rgba(0, 174, 239, 0.08);
  border: 1px solid rgba(0, 174, 239, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ocean-primary);
  flex-shrink: 0;
}

.skill-cat-icon svg {
  width: 18px;
  height: 18px;
}

.skill-cat-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-heading);
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-pill {
  padding: 5px 14px;
  background: rgba(0, 174, 239, 0.04);
  border: 1px solid rgba(0, 174, 239, 0.1);
  border-radius: 100px;
  font-size: 0.82rem;
  color: var(--text-body);
  font-family: var(--font-mono);
  transition: all var(--trans-fast);
  cursor: default;
}

.skill-pill:hover {
  background: rgba(0, 174, 239, 0.1);
  border-color: rgba(0, 174, 239, 0.3);
  color: var(--ocean-primary);
  transform: translateY(-2px);
}

/* =====================================================
   PROJECTS SECTION
   ===================================================== */
.projects-section {
  background: var(--bg-secondary);
  position: relative;
}

.projects-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 30% 0%, rgba(0, 174, 239, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.project-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  overflow: hidden;
  transition: border-color var(--trans-med), box-shadow var(--trans-med), transform var(--trans-slow);
  outline: none;
}

.project-card:hover,
.project-card:focus-visible {
  border-color: rgba(0, 174, 239, 0.3);
  box-shadow: 0 0 40px rgba(0, 174, 239, 0.1), 0 24px 48px rgba(0, 0, 0, 0.4);
  transform: translateY(-8px);
}

.project-card-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Project Visual Header */
.project-visual {
  position: relative;
  height: 160px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-visual-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
  transition: opacity var(--trans-med);
}

.project-card:hover .project-visual-bg {
  background: linear-gradient(135deg, rgba(0, 78, 124, 0.25) 0%, var(--bg-tertiary) 100%);
}

.project-visual-icon {
  position: relative;
  z-index: 2;
  width: 70px;
  height: 70px;
  transition: transform var(--trans-med);
}

.project-card:hover .project-visual-icon {
  transform: scale(1.08);
}

.project-visual-icon svg {
  width: 100%;
  height: 100%;
}

/* Project Content */
.project-content {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.project-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ocean-primary);
  opacity: 0.7;
}

.project-category {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-title {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 12px;
  line-height: 1.3;
  transition: color var(--trans-fast);
}

.project-card:hover .project-title {
  color: var(--ocean-bright);
}

.project-desc {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
}

.project-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.tech-badge {
  padding: 3px 10px;
  background: rgba(0, 174, 239, 0.06);
  border: 1px solid rgba(0, 174, 239, 0.12);
  border-radius: 4px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  transition: color var(--trans-fast), border-color var(--trans-fast);
}

.project-card:hover .tech-badge {
  color: var(--ocean-primary);
  border-color: rgba(0, 174, 239, 0.2);
}

.project-links {
  display: flex;
  gap: 16px;
  align-items: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--trans-fast), transform var(--trans-fast);
}

.project-link svg {
  width: 15px;
  height: 15px;
}

.project-link:hover {
  color: var(--ocean-primary);
  transform: translateX(3px);
}

.project-link-demo:hover {
  color: var(--ocean-bright);
}

/* =====================================================
   CERTIFICATIONS SECTION
   ===================================================== */
.cert-section {
  background: var(--bg-primary);
  position: relative;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.cert-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--trans-med), box-shadow var(--trans-med), transform var(--trans-med);
}

.cert-card:hover {
  border-color: rgba(0, 174, 239, 0.3);
  box-shadow: var(--glow-sm);
  transform: translateY(-4px);
}

.cert-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.cert-badge-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 174, 239, 0.1);
  border: 1px solid rgba(0, 174, 239, 0.25);
  color: var(--ocean-bright);
  flex-shrink: 0;
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cert-title {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
  line-height: 1.35;
}

.cert-desc {
  font-size: 0.85rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 18px;
  flex: 1;
}

.cert-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ocean-primary);
}

/* =====================================================
   CONTACT SECTION (DIRECT CONTACT HUB)
   ===================================================== */
.contact-section {
  background: var(--bg-secondary);
  position: relative;
}

.contact-bg-glow {
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(0, 174, 239, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.contact-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-card);
  border-radius: 18px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--trans-med), box-shadow var(--trans-med), transform var(--trans-med);
}

.contact-card:hover {
  border-color: rgba(0, 174, 239, 0.35);
  box-shadow: var(--glow-md);
  transform: translateY(-4px);
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 174, 239, 0.08);
  border: 1px solid rgba(0, 174, 239, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ocean-primary);
  flex-shrink: 0;
  transition: background var(--trans-fast), color var(--trans-fast);
}

.contact-card:hover .contact-card-icon {
  background: rgba(0, 174, 239, 0.15);
  color: var(--ocean-bright);
}

.contact-card-icon svg {
  width: 22px;
  height: 22px;
}

.contact-card-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-card-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contact-card-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-heading);
  transition: color var(--trans-fast);
  word-break: break-all;
}

a.contact-card-value:hover {
  color: var(--ocean-bright);
}

.contact-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding-top: 8px;
}

.location-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ocean-primary);
  padding: 6px 12px;
  background: rgba(0, 174, 239, 0.06);
  border: 1px solid rgba(0, 174, 239, 0.15);
  border-radius: 6px;
}

/* Copy Toast */
.copy-toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(7, 16, 24, 0.95);
  border: 1px solid var(--ocean-primary);
  box-shadow: 0 0 30px rgba(0, 174, 239, 0.3);
  backdrop-filter: blur(16px);
  padding: 12px 20px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-heading);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  z-index: 10000;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.copy-toast svg {
  width: 18px;
  height: 18px;
  color: #22C55E;
}

.copy-toast.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 32px;
  position: relative;
  z-index: 2;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 80px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.footer-tagline {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-right {
  text-align: right;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.footer-built {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ocean-dark);
}

.footer-line {
  max-width: var(--container-max);
  margin: 32px auto 0;
  padding: 0 clamp(20px, 5vw, 80px);
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(0, 174, 239, 0.12), transparent);
}

/* =====================================================
   RESPONSIVE — TABLET & MOBILE
   ===================================================== */
@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    text-align: left;
    gap: 50px;
  }

  .hero-visual {
    display: none;
  }

  .hero-scroll-hint {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .skills-categories {
    grid-template-columns: 1fr;
  }

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

  .contact-cards-grid {
    grid-template-columns: 1fr;
  }

  .footer-right {
    text-align: left;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 80px 0;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .mobile-menu {
    display: block;
  }

  .hero-name {
    font-size: clamp(3rem, 15vw, 5.5rem);
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .about-glow-card {
    width: 100%;
    max-width: 340px;
  }

  .section-title {
    font-size: clamp(1.7rem, 6vw, 2.5rem);
  }

  #cursor-dot,
  #cursor-ring,
  #cursor-spotlight {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .stat-divider {
    display: none;
  }

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