/* ==========================================================================
   IMVIBERS.COM — Official Website Stylesheet
   Pure CSS • Zero Bloat • Fast Load • Tactile Arcade Feel
   ========================================================================== */

:root {
  --bg-dark: #0a0c12;
  --bg-surface: #121520;
  --bg-card: #161926;
  --bg-card-hover: #1d2233;
  
  --amber: #f59e0b;
  --amber-light: #fbbf24;
  --amber-dark: #b45309;
  
  --text-white: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-amber: rgba(245, 158, 11, 0.3);
  
  --font-family: 'Fredoka', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-white);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
  background-attachment: fixed;
}

/* ----------------- TYPOGRAPHY & UTILS ----------------- */
a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

.highlight-amber {
  color: var(--amber-light);
}

/* ----------------- HEADER & NAV ----------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 12, 18, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.5px;
}

.logo-icon {
  width: 28px;
  height: 28px;
  display: block;
  transition: transform 0.2s ease;
}

.logo-brand:hover .logo-icon {
  transform: rotate(-8deg) scale(1.08);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--text-white);
}

/* ----------------- TACTILE BUTTONS ----------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-align: center;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background-color 0.15s ease;
  user-select: none;
}

/* Primary Amber Button */
.btn-primary {
  background-color: var(--amber);
  color: #160e02;
  box-shadow: 0 4px 0 var(--amber-dark);
}

.btn-primary:hover {
  background-color: var(--amber-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--amber-dark);
}

.btn-primary:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--amber-dark);
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-white);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 4px 0 #080a10;
}

.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #080a10;
}

.btn-secondary:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 #080a10;
}

/* Header Button */
.btn-nav {
  padding: 7px 16px;
  font-size: 0.88rem;
  box-shadow: 0 3px 0 var(--amber-dark);
}

/* ----------------- HERO SECTION ----------------- */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-inner {
  max-width: 760px;
  margin: 0 auto;
}

.hero-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--amber);
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(3.5rem, 9vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 24px;
  color: #ffffff;
}

.hero-mantra {
  font-size: clamp(1.2rem, 3.2vw, 1.6rem);
  font-weight: 600;
  color: var(--amber-light);
  line-height: 1.35;
  margin-bottom: 24px;
  quotes: none;
}

.hero-summary {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 auto 36px;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ----------------- ABOUT & CORE MECHANICS ----------------- */
.section-about {
  padding: 60px 0 70px;
  border-top: 1px solid var(--border-subtle);
}

.grid-three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-item:hover {
  border-color: rgba(245, 158, 11, 0.25);
  transform: translateY(-2px);
}

.feature-item h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
}

.feature-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* ----------------- FOOTER ----------------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-dark);
  padding: 32px 0;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.footer-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-copy {
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 20px;
}

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

/* ----------------- TOAST NOTIFICATION ----------------- */
.toast-msg {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-surface);
  color: var(--text-white);
  border: 1px solid var(--border-amber);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s ease;
  max-width: 90vw;
  text-align: center;
}

.toast-msg.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* ----------------- RESPONSIVENESS ----------------- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: 50px 0 40px;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .grid-three {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .footer-wrap {
    flex-direction: column;
    text-align: center;
  }
}