/* ==========================================================================
   Think Lab. - Apple-Inspired Minimalist & Sober Design System
   Aesthetic: Pure Deep Black, Cupertino Precision, Refined Lime Accent
   Optimized: Strict Zero Horizontal Overflow (iPhone 12 Pro / iOS Safari Tested)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-pure-black: #000000;
  --bg-card: #121214;
  --bg-card-hover: #18181b;
  --bg-secondary: #0d0d0f;
  --apple-text-primary: #f5f5f7;
  --apple-text-secondary: #86868b;
  --apple-text-muted: #6e6e73;
  --accent-lime: #a3e635;
  --accent-lime-subtle: rgba(163, 230, 53, 0.12);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  max-width: 100%;
}

html {
  width: 100%;
  max-width: 100%;
  overflow-x: clip !important;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", 'Plus Jakarta Sans', "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--bg-pure-black);
  color: var(--apple-text-primary);
  width: 100%;
  max-width: 100%;
  overflow-x: clip !important;
  position: relative;
  min-height: 100vh;
  letter-spacing: -0.015em;
  -webkit-font-smoothing: antialiased;
}

@supports not (overflow-x: clip) {
  html, body {
    overflow-x: hidden !important;
  }
}

img, svg, video, canvas, audio, iframe, embed, object {
  max-width: 100%;
  height: auto;
}

/* Custom Minimalist Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #000000;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.35);
}

/* Monospace font */
.font-mono {
  font-family: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Background Canvas (Strict Containment) */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
}

/* Ambient Subtle Apple Vignettes (Contained) */
.ambient-vignette {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 500px;
  height: 260px;
  background: radial-gradient(circle, rgba(163, 230, 53, 0.07) 0%, rgba(255, 255, 255, 0.03) 40%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

/* Apple Floating Header */
.apple-nav {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Apple-style Cards */
.apple-card {
  background: #101012;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  max-width: 100%;
  width: 100%;
}

@media (min-width: 640px) {
  .apple-card {
    border-radius: 24px;
  }
}

.apple-card:hover {
  background: #141416;
  border-color: rgba(255, 255, 255, 0.16);
  transform: translateY(-2px);
}

/* Apple Pill Badges */
.apple-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #f5f5f7;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: -0.01em;
  max-width: 100%;
}

@media (min-width: 640px) {
  .apple-pill {
    font-size: 12px;
    padding: 4px 14px;
  }
}

.apple-pill-lime {
  background: rgba(163, 230, 53, 0.08);
  border: 1px solid rgba(163, 230, 53, 0.25);
  color: #bef264;
}

/* Apple-style Headlines & Typography */
.apple-headline {
  font-size: clamp(1.85rem, 6.5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
  word-break: break-word;
}

.apple-subheadline {
  font-size: clamp(0.9rem, 3.2vw, 1.25rem);
  font-weight: 400;
  color: #86868b;
  line-height: 1.5;
  letter-spacing: -0.015em;
}

/* Subtle Apple Gradients */
.apple-gradient-text {
  background: linear-gradient(180deg, #ffffff 40%, #86868b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.apple-gradient-lime {
  background: linear-gradient(180deg, #ffffff 20%, #bef264 80%, #a3e635 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Apple Buttons */
.btn-apple-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #f5f5f7;
  color: #000000;
  font-weight: 600;
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .btn-apple-primary {
    font-size: 14px;
    padding: 10px 22px;
  }
}

.btn-apple-primary:hover {
  background: #ffffff;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
  transform: scale(1.02);
}

.btn-apple-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  color: #f5f5f7;
  font-weight: 500;
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .btn-apple-secondary {
    font-size: 14px;
    padding: 10px 22px;
  }
}

.btn-apple-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.btn-apple-lime {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #a3e635;
  color: #000000;
  font-weight: 600;
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 9999px;
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .btn-apple-lime {
    font-size: 14px;
    padding: 10px 22px;
  }
}

.btn-apple-lime:hover {
  background: #bef264;
  box-shadow: 0 4px 20px rgba(163, 230, 53, 0.3);
  transform: scale(1.02);
}

.apple-link {
  color: #a3e635;
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: opacity 0.2s ease;
}

.apple-link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* Apple Range Slider */
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  max-width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: transform 0.15s ease;
}

input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Apple Tab Buttons */
.apple-tab-btn {
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 500;
  color: #86868b;
  background: transparent;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .apple-tab-btn {
    padding: 8px 18px;
    font-size: 13px;
  }
}

.apple-tab-btn:hover {
  color: #f5f5f7;
}

.apple-tab-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.12);
}

/* FAQ Accordion */
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
}

.faq-item.active .faq-answer {
  max-height: 280px;
  opacity: 1;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: #a3e635;
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 20px;
  left: 16px;
  right: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

@media (min-width: 640px) {
  #toast-container {
    left: 20px;
    right: auto;
    max-width: 380px;
  }
}

.toast {
  background: rgba(20, 20, 24, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
  color: #f5f5f7;
  padding: 12px 18px;
  border-radius: 14px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  animation: appleSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

@keyframes appleSlideIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes beaconBlink {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 10px #a3e635, 0 0 3px #a3e635;
  }
  50% {
    opacity: 0.25;
    box-shadow: 0 0 2px rgba(163, 230, 53, 0.2);
  }
}

.beacon-glow {
  animation: beaconBlink 1.4s ease-in-out infinite;
}

/* Think Bot AI Styles */
.thinkbot-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #f5f5f7;
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 9999px;
  transition: all 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}

.thinkbot-chip:hover {
  background: rgba(163, 230, 53, 0.15);
  border-color: rgba(163, 230, 53, 0.4);
  color: #a3e635;
  transform: translateY(-1px);
}

.thinkbot-typing-dot {
  width: 5px;
  height: 5px;
  background: #a3e635;
  border-radius: 50%;
  animation: typingBounce 1.2s infinite ease-in-out;
}

.thinkbot-typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.thinkbot-typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingBounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  40% {
    transform: translateY(-4px);
    opacity: 1;
  }
}

/* ==========================================================================
   AI Chatbots Showcase Special Effects
   ========================================================================== */
.ai-mesh-glow {
  background: radial-gradient(circle at 50% 0%, rgba(163, 230, 53, 0.12) 0%, rgba(163, 230, 53, 0.02) 50%, transparent 80%);
}

.ai-card-glow {
  position: relative;
  background: rgba(14, 14, 17, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(24px);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.ai-card-glow:hover {
  border-color: rgba(163, 230, 53, 0.3);
  box-shadow: 0 12px 40px -10px rgba(163, 230, 53, 0.15);
  transform: translateY(-3px);
}

@keyframes aiPulseRing {
  0% {
    transform: scale(0.95);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.2;
  }
  100% {
    transform: scale(0.95);
    opacity: 0.8;
  }
}

.ai-radar-pulse {
  animation: aiPulseRing 2.4s ease-in-out infinite;
}

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

.ai-float-animation {
  animation: floatSoft 4s ease-in-out infinite;
}

.ai-tab-active {
  background: rgba(163, 230, 53, 0.15) !important;
  color: #a3e635 !important;
  border-color: rgba(163, 230, 53, 0.35) !important;
}

/* ==========================================================================
   Language Switcher (Apple Minimalist Glass)
   ========================================================================== */
.apple-lang-switch {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 9999px;
  padding: 2px;
  position: relative;
  transition: all 0.2s ease;
  user-select: none;
}

.apple-lang-switch:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.lang-btn {
  padding: 3px 9px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: #86868b;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  line-height: 1.2;
}

.lang-btn:hover {
  color: #ffffff;
}

.lang-btn.active {
  background: #ffffff;
  color: #000000;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}