/*============================================================*\
  #LIQUID-GLASS-SYSTEM.CSS
  Modern dark glassmorphism system inspired by Apple interfaces.
  Uses a double glass hierarchy (clear & tinted) with specular
  refractions, pointer spotlights, and scrolling support.
\*============================================================*/

:root {
  /* ─── Glass design tokens ───────────────────────────────── */
  --page-background:     #050b18;
  --glass-clear:         rgba(17, 30, 52, 0.58);
  --glass-tinted:        rgba(10, 21, 38, 0.82); /* slightly darker for text readability */
  --glass-tinted-hover:  rgba(14, 28, 50, 0.86);
  --glass-border:        rgba(158, 187, 255, 0.13);
  --glass-border-active: rgba(82, 145, 255, 0.38);
  --glass-highlight:     rgba(255, 255, 255, 0.08);
  --glass-shadow:        rgba(0, 0, 0, 0.28);
}

/* ─── Clear Glass (Top Nav, Chips, Small Controls) ──────── */
.header-container,
.navbar-link,
.capability-chip,
.tech-badge,
.skills-item,
.copy-feedback-bubble {
  background: var(--glass-clear);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 16px var(--glass-shadow);
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

/* ─── Tinted Glass (Sidebar, Content Cards, Contact Form) ── */
.sidebar,
.service-item,
.timeline-item,
.project-item > a,
.contact-form,
.testimonials-modal {
  background: var(--glass-tinted);
  backdrop-filter: blur(16px) saturate(125%);
  -webkit-backdrop-filter: blur(16px) saturate(125%);
  border: 1px solid var(--glass-border);
  box-shadow: 
    0 12px 40px var(--glass-shadow), 
    inset 0 1px 0 var(--glass-highlight);
  position: relative;
  overflow: hidden;
  transition: 
    transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), 
    border-color 0.35s ease, 
    background-color 0.35s ease, 
    box-shadow 0.35s ease;
}

/* Content layer protection inside cards to ensure contrast */
.sidebar > *,
.service-item > *,
.timeline-item > *,
.project-item > a > *,
.contact-form > *,
.testimonials-modal > * {
  position: relative;
  z-index: 2;
}

/* ─── Specular Light Reflection Layer (Top-Left Highlight) ─ */
.sidebar::after,
.service-item::after,
.timeline-item::after,
.project-item > a::after,
.contact-form::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 45%);
  pointer-events: none;
  z-index: 1;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.sidebar:hover::after,
.service-item:hover::after,
.timeline-item:hover::after,
.project-item > a:hover::after,
.contact-form:hover::after {
  transform: scale(1.02) translate(1px, 1px);
}

/* ─── Pointer Spotlight Highlight (Clipped Inside Card) ─── */
.sidebar.spotlit::before,
.service-item.spotlit::before,
.timeline-item.spotlit::before,
.project-item > a.spotlit::before,
.contact-form.spotlit::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    260px circle at var(--spot-x, 50%) var(--spot-y, 50%),
    rgba(77, 141, 255, 0.06),
    transparent 80%
  );
  pointer-events: none;
  z-index: 0;
  opacity: 1;
  transition: opacity 0.25s ease;
}

/* ─── Navigation Header Specifics ───────────────────────── */
.header-container {
  border-radius: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16); /* thin illuminated upper border */
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.32);
}

/* Page Navigation Indicator Line */
.nav-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue, #4d8dff), var(--accent-purple, #8057ff));
  z-index: 6;
  border-radius: 0 0 0 18px;
  transition: width 0.1s linear, opacity 0.25s ease;
}

/* Sliding active tab indicator */
.nav-indicator {
  position: absolute;
  bottom: 6px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue, #4d8dff), var(--accent-purple, #8057ff));
  border-radius: 2px;
  pointer-events: none;
  z-index: 3;
}

/* Navigation button glass capsules */
.navbar-link {
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm, 8px);
  padding: 8px 14px;
}

.navbar-link:hover,
.navbar-link:focus {
  background: rgba(77, 141, 255, 0.08);
  border-color: rgba(77, 141, 255, 0.28);
}

.navbar-link.active {
  background: rgba(77, 141, 255, 0.12);
  border-color: var(--glass-border-active);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  color: var(--text-primary, #f5f7ff);
}

/* ─── Profile Sidebar Specifics ─────────────────────────── */
.sidebar {
  border-radius: 24px;
  background: rgba(10, 21, 38, 0.88); /* more opaque because it contains bio */
}

/* Availability Badge */
.availability-badge {
  position: absolute;
  bottom: 0px;
  right: 0px;
  background: rgba(9, 20, 38, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 3px 8px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 5px;
  z-index: 5;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.15);
}

.availability-badge .pulse-dot {
  width: 6px;
  height: 6px;
  background-color: #10b981;
  border-radius: 50%;
  position: relative;
  display: inline-block;
}

.availability-badge .pulse-dot::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-color: #10b981;
  border-radius: 50%;
  animation: badgePulse 1.8s ease-out infinite;
}

@keyframes badgePulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.6); opacity: 0; }
}

.availability-badge .badge-text {
  font-size: 9px;
  font-weight: 600;
  color: #a7f3d0;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Email Copy feedback bubble */
.copy-feedback-bubble {
  position: absolute;
  top: -34px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 10px;
  font-weight: 500;
  color: var(--text-primary, #f5f7ff);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  z-index: 10;
  transition: opacity 0.25s ease, transform 0.25s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  background: var(--glass-clear);
  border: 1px solid var(--glass-border-active);
}

.copy-feedback-bubble.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Capability Chips & Small Tiles ───────────────────── */
.capability-chip {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 12px;
  color: var(--accent-blue, #4d8dff);
  background: rgba(77, 141, 255, 0.08);
  border: 1px solid rgba(77, 141, 255, 0.16);
  white-space: nowrap;
  transition: all 0.25s ease;
}

.capability-chip:hover {
  background: rgba(77, 141, 255, 0.15);
  border-color: rgba(77, 141, 255, 0.32);
  transform: translateY(-1px);
}

/* Technology stacked icons alignment and white box removal */
.skills-item {
  background: rgba(13, 27, 49, 0.5);
  border-radius: 14px;
}

.skills-icon {
  width: 52px;
  height: 52px;
  object-fit: contain;
  border-radius: 8px;
  padding: 4px;
  background-color: transparent !important;
  mix-blend-mode: normal;
}

/* ─── Contact Form Elements ─────────────────────────────── */
@keyframes calmGradient {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.contact-form {
  background: linear-gradient(135deg, rgba(10, 21, 38, 0.82) 0%, rgba(18, 33, 58, 0.88) 50%, rgba(10, 21, 38, 0.82) 100%) !important;
  background-size: 200% 200% !important;
  animation: calmGradient 10s ease infinite;
}

.form-input {
  background: rgba(5, 11, 24, 0.35) !important;
  border: 1px solid var(--glass-border) !important;
  color: var(--text-primary, #f5f7ff) !important;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.form-input:focus {
  border-color: var(--glass-border-active) !important;
  background-color: rgba(77, 141, 255, 0.05) !important;
  box-shadow: 0 0 10px rgba(77, 141, 255, 0.16) !important;
  outline: none;
}

.form-input:focus:invalid {
  border-color: rgba(239, 68, 68, 0.5) !important;
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.15) !important;
}

.form-input:focus:valid {
  border-color: rgba(16, 185, 129, 0.5) !important;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.15) !important;
}

/* ─── Ambient radial gradients background ───────────────── */
body::after {
  content: "";
  position: fixed;
  top: 15%; left: 10%;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(77, 141, 255, 0.06) 0%, transparent 70%);
  z-index: -3;
  pointer-events: none;
}

body::before {
  content: "";
  position: fixed;
  bottom: 15%; right: 10%;
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(128, 87, 255, 0.05) 0%, transparent 70%);
  z-index: -3;
  pointer-events: none;
}

/* ─── Double Refraction and Border Highlights hover ─────── */
.sidebar:hover,
.service-item:hover,
.timeline-item:hover,
.project-item > a:hover,
.contact-form:hover {
  border-color: var(--glass-border-active);
  background-color: var(--glass-tinted-hover);
  box-shadow: 
    0 16px 48px var(--glass-shadow), 
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    0 0 12px rgba(77, 141, 255, 0.08);
  transform: translateY(-3px);
}

/* ─── Browser Compatibility & Fallback ──────────────────── */
@supports not (backdrop-filter: blur(1px)) {
  .header-container,
  .navbar-link,
  .sidebar,
  .service-item,
  .timeline-item,
  .project-item > a,
  .contact-form {
    background-color: #0b1526 !important; /* solid fallback */
  }
}

/* Accessibility high-contrast mode or reduced transparency */
@media (prefers-contrast: more) {
  :root {
    --glass-clear: rgba(10, 21, 38, 0.94);
    --glass-tinted: #0a1526;
    --glass-border: rgba(255, 255, 255, 0.45);
  }
}

/* ─── Responsive Adjustments ────────────────────────────── */
@media (max-width: 1024px) {
  :root {
    --glass-clear: rgba(14, 25, 44, 0.72);
    --glass-tinted: rgba(10, 21, 38, 0.90);
  }
  .sidebar,
  .service-item,
  .timeline-item,
  .project-item > a,
  .contact-form {
    backdrop-filter: blur(12px) saturate(110%);
    -webkit-backdrop-filter: blur(12px) saturate(110%);
  }
}

@media (max-width: 768px) {
  :root {
    --glass-clear: #0d1a2d;
    --glass-tinted: #0a1526;
  }
  .sidebar,
  .service-item,
  .timeline-item,
  .project-item > a,
  .contact-form {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transform: none !important;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35) !important;
  }
  .sidebar::after,
  .service-item::after,
  .timeline-item::after,
  .project-item > a::after,
  .contact-form::after {
    display: none;
  }
}