/* ==========================================================================
   CSS DESIGN SYSTEM - CLOUD ARCHITECT PORTFOLIO
   ========================================================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Color Tokens - Dark Mode (Default) */
  --bg-primary: #0a0b10;
  --bg-secondary: #121420;
  --bg-tertiary: #191c2d;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --primary: #6366f1; /* Indigo */
  --primary-glow: rgba(99, 102, 241, 0.15);
  --accent: #14b8a6; /* Teal */
  --accent-glow: rgba(20, 184, 166, 0.2);
  --secondary: #a855f7; /* Purple */
  --secondary-glow: rgba(168, 85, 247, 0.15);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(25, 28, 45, 0.65);
  --glass-bg: rgba(10, 11, 16, 0.7);
  --glass-border: rgba(255, 255, 255, 0.05);
  
  /* Fonts */
  --font-display: 'Outfit', sans-serif;
  --font-sans: 'Inter', sans-serif;
  
  /* Layout & Shadows */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  --max-width: 1200px;
}

/* Light Theme Variables overrides */
[data-theme="light"] {
  --bg-primary: #f9fafb;
  --bg-secondary: #f3f4f6;
  --bg-tertiary: #e5e7eb;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  
  --primary: #4f46e5;
  --primary-glow: rgba(79, 70, 229, 0.08);
  --accent: #0d9488;
  --accent-glow: rgba(13, 148, 136, 0.1);
  --secondary: #9333ea;
  --secondary-glow: rgba(147, 51, 234, 0.08);
  
  --border-color: rgba(0, 0, 0, 0.08);
  --card-bg: rgba(255, 255, 255, 0.8);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.05);
}

/* Global Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

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

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

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

.section {
  padding: 8rem 0;
  position: relative;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-align: center;
  position: relative;
  z-index: 2;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 4rem auto;
  position: relative;
  z-index: 2;
}

/* Highlight style */
.highlight-gradient {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.highlight-accent {
  color: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  font-family: var(--font-display);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  transition: background-color var(--transition-normal);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  color: var(--accent);
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="light"] .theme-toggle .sun-icon {
  display: block;
}

[data-theme="light"] .theme-toggle .moon-icon {
  display: none;
}

/* Mobile Nav Button */
.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  position: relative;
  overflow: hidden;
}

.hero-bg-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  filter: blur(8px) brightness(0.6);
  transition: opacity var(--transition-slow);
}

[data-theme="light"] .hero-bg-image {
  opacity: 0.08;
  filter: blur(12px) brightness(1.2);
}

.hero-glow-1 {
  position: absolute;
  top: 10%;
  right: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}

.hero-glow-2 {
  position: absolute;
  bottom: 10%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(50px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text {
  max-width: 650px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--primary-glow);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--primary);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

[data-theme="light"] .badge {
  color: var(--primary);
  background-color: var(--primary-glow);
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

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

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Animated floating console mock */
.console-mockup {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  width: 100%;
  max-width: 450px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: float 6s ease-in-out infinite;
}

.console-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.console-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.console-body {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  color: #10b981;
}

.console-line {
  margin-bottom: 0.5rem;
  display: flex;
  gap: 0.5rem;
}

.console-prompt {
  color: var(--accent);
  user-select: none;
}

.console-output {
  color: var(--text-primary);
}

/* Keyframes */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* Interactive Cloud Architecture Visualizer */
.architecture-container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.architecture-diagram {
  position: relative;
  min-height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* SVG Cloud Architecture Diagram Styling */
.arch-svg {
  width: 100%;
  height: auto;
  max-width: 480px;
}

.node {
  cursor: pointer;
  transition: all var(--transition-normal);
}

.node-bg {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 2px;
  transition: all var(--transition-normal);
}

.node:hover .node-bg,
.node.active .node-bg {
  stroke: var(--accent);
  fill: var(--primary-glow);
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.node-icon {
  transition: all var(--transition-normal);
}

.node:hover .node-icon,
.node.active .node-icon {
  fill: var(--accent);
}

.node-text {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  fill: var(--text-secondary);
  text-anchor: middle;
  transition: all var(--transition-normal);
}

.node:hover .node-text,
.node.active .node-text {
  fill: var(--text-primary);
}

.connector-line {
  stroke: var(--text-muted);
  stroke-dasharray: 4 4;
  animation: dash 15s linear infinite;
  transition: stroke var(--transition-normal);
}

.connector-line.active {
  stroke: var(--accent);
  stroke-dasharray: none;
}

@keyframes dash {
  to {
    stroke-dashoffset: -100;
  }
}

.architecture-details {
  z-index: 2;
}

.info-panel {
  display: none;
  animation: fadeIn var(--transition-normal) forwards;
}

.info-panel.active {
  display: block;
}

.info-panel h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.feature-icon {
  color: var(--accent);
  flex-shrink: 0;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Portfolio Cards Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 12px 30px var(--primary-glow);
}

.project-image-container {
  height: 200px;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-placeholder-icon {
  font-size: 4rem;
  color: var(--primary);
  opacity: 0.6;
  transition: all var(--transition-normal);
}

.project-card:hover .project-placeholder-icon {
  transform: scale(1.1);
  opacity: 1;
}

.project-card-info {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.project-tag {
  font-size: 0.75rem;
  font-weight: 600;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  color: var(--text-secondary);
}

.project-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--accent);
}

.project-link:hover {
  color: var(--primary);
}

/* Contact Form */
.contact-container {
  max-width: 650px;
  margin: 0 auto;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

.form-group {
  position: relative;
  margin-bottom: 2rem;
}

.form-input {
  width: 100%;
  padding: 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Floating label effect */
.form-label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--transition-fast);
}

.form-input:focus ~ .form-label,
.form-input:not(:placeholder-shown) ~ .form-label {
  top: -0.6rem;
  left: 0.8rem;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--bg-secondary);
  padding: 0 0.4rem;
  color: var(--primary);
}

textarea.form-input {
  min-height: 150px;
  resize: vertical;
}

.form-status {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: none;
  animation: fadeIn var(--transition-normal) forwards;
}

.form-status.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-status.error {
  display: block;
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Footer styling */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0;
  color: var(--text-secondary);
}

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

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

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

/* ==========================================================================
   404 PAGE STYLING
   ========================================================================== */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 2rem;
  text-align: center;
}

.error-container {
  max-width: 600px;
  position: relative;
  z-index: 2;
}

.error-code {
  font-size: 8rem;
  font-family: var(--font-display);
  font-weight: 800;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 1rem;
}

.error-title {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.error-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

/* Cloud SVG animation on 404 */
.error-visual-container {
  margin-bottom: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

.cloud-404-svg {
  width: 150px;
  height: auto;
  animation: errorFloat 5s ease-in-out infinite;
}

@keyframes errorFloat {
  0%, 100% { transform: translateY(0) rotate(0); }
  50% { transform: translateY(-12px) rotate(2deg); }
}

.cloud-body {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 4px;
}

.cloud-face {
  fill: var(--text-muted);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  
  .hero-text {
    margin: 0 auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .architecture-container {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding: 2rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 5rem 0;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .menu-btn {
    display: block;
    z-index: 1001;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    transition: right var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-links.open {
    right: 0;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-container {
    padding: 2rem 1.5rem;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}