/* 
  COBOTERA Design System
  Theme: Dark Cinematic / Navy / Cyan
*/

:root {
  /* Base Colors - Dark Theme */
  --color-bg-base: #050a15;
  --color-bg-surface: #0d1a2d;
  --color-text-main: #e0e6ed;
  --color-text-muted: #8892a4;
  
  /* Accents */
  --color-accent-blue: #00B4D8;
  --color-accent-cyan: #00B4D8;
  --color-accent-cyan-glow: rgba(0, 180, 216, 0.2);
  
  /* Layout */
  --nav-height: 80px;
  
  /* Borders */
  --border-thin: 1px solid rgba(0, 180, 216, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
}

a {
  color: var(--color-accent-cyan);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #fff;
}

/* Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(5, 10, 21, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: var(--border-thin);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.page-section {
  padding-top: calc(var(--nav-height) + 2rem);
  padding-bottom: 4rem;
  min-height: 100vh;
}

/* Cards */
.card-light {
  background: var(--color-bg-surface);
  color: var(--color-text-main);
  border: var(--border-thin);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.card-light h1, .card-light h2, .card-light h3, .card-light h4, .card-light h5, .card-light h6 {
  color: #fff;
}

.card-glass {
  background: rgba(13, 26, 45, 0.8);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(0, 180, 216, 0.12);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.card-glass:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(0, 180, 216, 0.15);
  border-color: rgba(0, 180, 216, 0.3);
}

/* Animations */
@keyframes eyeBlink {
  0% { transform: scaleY(1); }
  93% { transform: scaleY(1); }
  95% { transform: scaleY(0); }
  97% { transform: scaleY(1); }
  100% { transform: scaleY(1); }
}

@keyframes brushRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes statusPulse {
  0% { opacity: 0.3; filter: blur(2px); }
  50% { opacity: 1; filter: blur(6px); }
  100% { opacity: 0.3; filter: blur(2px); }
}

@keyframes idleBreathe {
  0% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
  100% { transform: translateY(0); }
}

@keyframes ambientPulse {
  0% { transform: translate(0, 0); }
  50% { transform: translate(4%, -3%); }
  100% { transform: translate(0, 0); }
}

/* Utility Animation Classes */
.anim-eye-blink {
  animation: eyeBlink 4s infinite linear;
  display: inline-block;
}

.anim-brush-rotate {
  animation: brushRotate 8s infinite linear;
  display: inline-block;
}

.anim-status-pulse {
  animation: statusPulse 2s infinite ease-in-out;
}

.anim-idle-breathe {
  animation: idleBreathe 6s infinite ease-in-out;
}

.anim-ambient-pulse {
  animation: ambientPulse 15s infinite ease-in-out alternate;
}

/* Buttons */
.btn-primary {
  background: var(--color-accent-cyan);
  color: #FFFFFF;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(0, 180, 216, 0.4);
  transform: translateY(-2px);
}

.btn-holographic, .btn-secondary {
  background: transparent;
  color: var(--color-accent-cyan);
  border: 1px solid var(--color-accent-cyan);
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-holographic:hover, .btn-secondary:hover {
  background: var(--color-accent-cyan-glow);
  box-shadow: 0 4px 15px var(--color-accent-cyan-glow);
}