/* ==========================================================================
   Akira's Portfolio - Redesigned Style (Pantone "Cloud Dancer" & "Mocha Mousse" Theme)
   ========================================================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* Redesigned Design Tokens */
:root {
  /* PANTONE 11-4201 "Cloud Dancer" Theme (Light Mode Default) */
  --bg-primary: #f2f5f9;       /* Cloud Dancer - clean, airiness, balanced white */
  --bg-secondary: rgba(255, 255, 255, 0.65); /* Crystal clear glass */
  --bg-tertiary: rgba(235, 240, 246, 0.8);
  
  --border-color: rgba(15, 23, 42, 0.06);
  --border-hover: rgba(15, 23, 42, 0.12);
  
  /* Slate/Graphite Dark Text (WCAG compliant contrast) */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  /* Pantone-infused Elegant Accents for Light Mode */
  --color-green: #0d9488;       /* Sage/Teal Green - healthy status */
  --color-green-glow: rgba(13, 148, 136, 0.08);
  
  --color-purple: #6366f1;      /* Deep Iris Indigo - AI & RAG */
  --color-purple-glow: rgba(99, 102, 241, 0.08);
  
  --color-cyan: #0284c7;        /* Cloud Blue - Cloud infrastructure */
  --color-cyan-glow: rgba(2, 132, 199, 0.08);
  
  --color-orange: #ea580c;      /* Observability alerting */
  --color-orange-glow: rgba(234, 88, 12, 0.08);
  
  --card-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.04);
  --card-shadow-hover: 0 20px 40px -15px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(99, 102, 241, 0.1);
  --glow-opacity: 0.12;

  --transition-speed: 0.4s;
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
}

/* Dark Theme overrides (Premium Mocha Mousse & Espresso Black) */
[data-theme="dark"] {
  /* Background: Espresso Black (#0f0d0c) - Warm, rich, luxurious espresso dark */
  --bg-primary: #0f0d0c;
  --bg-secondary: rgba(22, 19, 17, 0.7); /* Translucent dark cocoa glass */
  --bg-tertiary: rgba(36, 31, 28, 0.6);
  
  --border-color: rgba(164, 120, 100, 0.08); /* Warm Mocha Mousse border */
  --border-hover: rgba(164, 120, 100, 0.18);
  
  --text-primary: #fcfbfa; /* Warm paper white */
  --text-secondary: #c5b4ab; /* Soft warm gray-brown */
  --text-muted: #8c786e; /* Slate-mocha muted */
  
  /* Pantone 2025 Mocha Mousse Accents (#a47864) and Luxury Gold/Champagne */
  --color-purple: #a47864;     /* Pantone 17-1230 Mocha Mousse */
  --color-purple-glow: rgba(164, 120, 100, 0.16);
  
  --color-cyan: #d4b295;       /* Premium Champagne Gold for Cloud node */
  --color-cyan-glow: rgba(212, 178, 149, 0.12);
  
  --color-green: #10b981;      /* Bright Sage/Teal for Healthy status */
  --color-green-glow: rgba(16, 185, 129, 0.15);
  
  --color-orange: #f97316;     /* Bright alerting */
  --color-orange-glow: rgba(249, 115, 22, 0.15);
  
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.65);
  --card-shadow-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.85), 0 0 15px rgba(164, 120, 100, 0.15);
  --glow-opacity: 0.22;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Background Cyber Grid with responsive opacity */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 50px 50px;
  background-position: center center;
  z-index: -2;
  pointer-events: none;
  opacity: 0.6;
}

body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 50% 40%, transparent 10%, var(--bg-primary) 85%);
  z-index: -1;
  pointer-events: none;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-purple) 60%, var(--color-green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
  color: var(--text-primary);
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 45px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  border-radius: 2px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: -2rem;
  margin-bottom: 3.5rem;
  max-width: 700px;
}

/* Flowing Glow Blobs */
.glow-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  z-index: -1;
  opacity: var(--glow-opacity);
  pointer-events: none;
  transition: opacity var(--transition-speed);
}
.blob-1 {
  top: 10%;
  left: 8%;
  width: 450px;
  height: 450px;
  background: var(--color-purple);
  animation: float-slow 20s infinite alternate;
}
.blob-2 {
  top: 40%;
  right: 5%;
  width: 480px;
  height: 480px;
  background: var(--color-cyan);
  animation: float-slow 25s infinite alternate-reverse;
}
.blob-3 {
  bottom: 12%;
  left: 15%;
  width: 380px;
  height: 380px;
  background: var(--color-green);
  animation: float-slow 18s infinite alternate;
}

@keyframes float-slow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -50px) scale(1.05); }
  100% { transform: translate(-15px, 25px) scale(0.95); }
}

/* Crystal Glass Card Design */
.glass-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition-speed), 
              transform var(--transition-speed), 
              box-shadow var(--transition-speed),
              background-color var(--transition-speed);
}

.glass-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

/* Fixed Navigation bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  z-index: 100;
  border-bottom: 1px solid var(--border-color);
  background: rgba(242, 245, 249, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background-color var(--transition-speed);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 13, 12, 0.75);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo span {
  color: var(--color-green);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-speed);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  transition: width var(--transition-speed);
  border-radius: 2px;
}

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

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: transform 0.5s ease, background-color var(--transition-speed);
}

.theme-toggle-btn:hover {
  transform: rotate(30deg);
  background: var(--border-hover);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
}

.hero-content {
  max-width: 800px;
}

.hero-subtitle {
  font-family: var(--font-mono);
  color: var(--color-green);
  font-size: 1.1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-indicator {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-green);
  box-shadow: 0 0 10px var(--color-green);
  animation: pulse 2.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 4rem;
  line-height: 1.1;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-headline {
  font-size: 1.8rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  height: 2.7rem;
}

.typed-cursor {
  color: var(--color-purple);
  animation: blink 0.7s infinite;
}

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

.hero-description {
  color: var(--text-secondary);
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
  max-width: 650px;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

/* Redesigned Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.75rem;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-purple) 100%);
  color: #ffffff !important;
  border: none;
  box-shadow: 0 4px 25px rgba(164, 120, 100, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(164, 120, 100, 0.35);
  opacity: 0.95;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: 1.25rem;
  margin-left: 1rem;
}

.social-icon {
  font-size: 1.5rem;
  color: var(--text-secondary);
  transition: color var(--transition-speed), transform var(--transition-speed);
}

.social-icon:hover {
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* Sections Base */
section {
  padding: 8rem 0;
  position: relative;
}

/* Focus Areas Grid */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.focus-card {
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.focus-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent-gradient, linear-gradient(90deg, var(--color-cyan), var(--color-purple)));
  opacity: 0.8;
}

.focus-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.focus-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.focus-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Tech Stack Redesign */
.stack-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.tab-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.55rem 1.35rem;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
  font-family: var(--font-sans);
  box-shadow: var(--card-shadow);
}

.tab-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(164, 120, 100, 0.25);
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.5rem;
}

.stack-card {
  padding: 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.stack-card i {
  font-size: 2.2rem;
  color: var(--accent-color, var(--color-cyan));
  transition: transform 0.3s ease;
}

.stack-card:hover i {
  transform: scale(1.15);
}

.stack-card span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stack-card .category-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Featured Projects Cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
}

.project-card {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.project-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-purple);
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  font-size: 1.3rem;
  color: var(--text-secondary);
  transition: color var(--transition-speed), transform var(--transition-speed);
}

.project-link:hover {
  color: var(--text-primary);
  transform: scale(1.1);
}

.project-title {
  font-size: 1.45rem;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Hybrid Lab & Active Prober Section */
.lab-container {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 4rem;
  align-items: center;
}

.lab-info h3 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
}

.lab-info p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.lab-features {
  list-style: none;
}

.lab-features li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.lab-features li::before {
  content: "✦";
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-size: 0.9rem;
}

/* SRE Probing Console Nodes styling */
.lab-dashboard {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  position: relative;
}

.dashboard-node {
  padding: 1.75rem;
  z-index: 2;
  position: relative;
  border-left: 3px solid var(--border-color); /* Neutral default */
}

/* Status-driven card borders */
.dashboard-node.status-active {
  border-left-color: var(--color-green);
}

.dashboard-node.status-offline {
  border-left-color: var(--color-orange);
}

.dashboard-node.status-probing {
  border-left-color: var(--text-muted);
}

.node-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.node-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

/* Healthy Green Pulse */
.node-status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-green);
}

.node-status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 8px var(--color-green);
  animation: pulse 2.5s infinite;
}

/* Offline Orange/Red state */
.node-status.offline {
  color: var(--color-orange);
}

.node-status.offline::before {
  background: var(--color-orange);
  box-shadow: 0 0 8px var(--color-orange);
  animation: pulse-orange 1.5s infinite;
}

@keyframes pulse-orange {
  0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(234, 88, 12, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(234, 88, 12, 0); }
  100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(234, 88, 12, 0); }
}

/* Probing Status */
.node-status.probing {
  color: var(--text-muted);
}
.node-status.probing::before {
  background: var(--text-muted);
  box-shadow: none;
  animation: rotate-spinner 1s linear infinite;
  border: 2px solid var(--text-muted);
  border-top-color: transparent;
  width: 8px;
  height: 8px;
}

@keyframes rotate-spinner {
  to { transform: rotate(360deg); }
}

.node-detail {
  font-size: 0.85rem;
  color: var(--text-secondary);
  min-height: 2.7rem;
}

.node-metrics {
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

.node-metrics span:first-child {
  color: var(--text-secondary);
}

/* Certifications Redesign */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.cert-card {
  padding: 2rem;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.cert-icon {
  font-size: 2.5rem;
  color: #eab308; /* Premium warm amber */
  filter: drop-shadow(0 2px 8px rgba(234, 179, 8, 0.15));
}

.cert-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.cert-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* Elegant Footer */
footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  padding: 4rem 0 2.5rem;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-logo span {
  color: var(--color-green);
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.25rem;
  transition: color var(--transition-speed);
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* Scroll Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Layout Adjustments for Tablet/Mobile */
@media (max-width: 992px) {
  .lab-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.8rem;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .hero-headline {
    font-size: 1.3rem;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    padding-top: 3rem;
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .mobile-menu-toggle {
    display: block;
  }

  .hero-actions {
    flex-wrap: wrap;
  }
  
  .social-links {
    margin-left: 0;
    margin-top: 1rem;
    width: 100%;
  }

  .lab-dashboard {
    grid-template-columns: 1fr;
  }
}