/* ==========================================================================
   Desam Jagadeeswara Reddy - Creative Developer Portfolio Styles
   Dark Mode Theme & Responsive Layout System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  /* Dynamic Accent Color Variables (Customizable via Javascript Accent Selector) */
  --accent-rgb: 59, 130, 246; /* Default Blue #3b82f6 */
  --accent-color: rgb(var(--accent-rgb));
  --accent-glow: rgba(var(--accent-rgb), 0.25);
  --accent-border: rgba(var(--accent-rgb), 0.35);

  /* Dark Theme Surfaces */
  --bg-dark: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #172033;
  --bg-surface: #0f172a;
  --border-muted: #1e293b;
  --border-subtle: rgba(255, 255, 255, 0.08);

  /* Typography Colors */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
}

/* Custom Preset Accent Themes */
[data-theme="blue"] {
  --accent-rgb: 59, 130, 246; /* #3b82f6 */
}
[data-theme="emerald"] {
  --accent-rgb: 16, 185, 129; /* #10b981 */
}
[data-theme="purple"] {
  --accent-rgb: 168, 85, 247; /* #a855f7 */
}
[data-theme="amber"] {
  --accent-rgb: 245, 158, 11; /* #f59e0b */
}

/* Global Reset & Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  overflow-x: hidden;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-dark);
  min-height: 100vh;
  line-height: 1.6;
}

/* Code & Tech Font Family */
.font-mono-tech {
  font-family: 'Space Grotesk', monospace;
}

/* Custom Dark Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* Custom Text Selection */
::selection {
  background-color: var(--accent-glow);
  color: #ffffff;
}

/* Ambient Background Canvas */
#heroCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Card Glow Effect on Hover */
.glow-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-muted);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.glow-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.glow-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px -10px var(--accent-glow);
}

.glow-card:hover::before {
  opacity: 1;
}

/* Interactive Button Styling */
.btn-primary {
  background-color: var(--accent-color);
  color: #ffffff;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px 0 var(--accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 var(--accent-glow);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-muted);
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-border);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Text Gradient Accent */
.text-gradient {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Section Divider Pulse Line */
.gradient-divider {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--border-muted), var(--accent-color), var(--border-muted), transparent);
  opacity: 0.6;
}

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

.animate-float {
  animation: float 5s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

.animate-pulse-glow {
  animation: pulseGlow 4s ease-in-out infinite;
}

/* Typing Cursor Effect */
.typing-cursor::after {
  content: '|';
  animation: blink 1s step-start infinite;
  color: var(--accent-color);
  font-weight: 700;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Skill Progress Bar Animation */
.skill-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-color), rgba(var(--accent-rgb), 0.7));
  border-radius: 9999px;
  width: 0%;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Modal Overlay Styling */
.modal-backdrop {
  background-color: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(8px);
}

/* Toast Notifications */
#toastContainer {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: #111827;
  border: 1px solid var(--accent-border);
  color: #ffffff;
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideInRight 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Terminal Console Window */
.terminal-window {
  background-color: #0d1117;
  border: 1px solid #30363d;
  border-radius: 0.75rem;
  box-shadow: 0 20px 40px -15px rgba(0,0,0,0.7);
  font-family: 'Space Grotesk', monospace;
}