/* ==========================================================================
   THEME VARIABLES & COLOR UTILITIES (Unified Cyber Purple)
   ========================================================================== */
:root {
  --bg: #07090d;
  --card: #0c0f15;
  --text: #dde4f0;
  --text-muted: #4e6070;
  --border: #161c27;
  --nav-bg: rgba(12, 15, 21, 0.85);

  /* Deep Royal Purple Theme Core */
  --accent: #6d28d9;
  --accent-glow: rgba(109, 40, 217, 0.35);
  --accent-text: #a78bfa;

  /* Sideload Feedback States */
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.15);
  --error: #ef4444;
  --error-glow: rgba(239, 68, 68, 0.15);
}

/* ==========================================================================
   BASE RESETS & MOBILE CORE
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%; /* Prevents iOS auto-resizing text */
  -webkit-tap-highlight-color: transparent; /* Removes ugly flash on mobile touch */
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Oxanium', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  line-height: 1.5;
}

/* Technological background grid - updated with purple ambient accent mapping */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(109, 40, 217, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(109, 40, 217, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: 0;
  pointer-events: none;
}

/* ==========================================================================
   LAYOUT CONTAINER
   ========================================================================== */
.container {
  position: relative;
  z-index: 1;
  max-width: 600px; /* Optimized structure for narrow phone configurations */
  width: 100%;
  padding: 1.5rem 1rem 120px; /* Extra bottom padding to clear the bottom navbar */
  margin: auto;
}

/* ==========================================================================
   NAVBAR (Mobile Responsive Architecture)
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--accent);
}

.nav-left {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto; /* Allow side scrolling for nav items if needed on tiny screens */
  -webkit-overflow-scrolling: touch;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  border: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-text);
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem); /* Scaled down slightly for PC screens */
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-align: center;
  background: linear-gradient(135deg, #c084fc 0%, #a78bfa 50%, #818cf8 100%); /* Purple/Violet/Indigo Gradient */
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.tagline {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* ==========================================================================
   SIGNER FORMS & INPUT CONTROLS (Touch Screen Optimized)
   ========================================================================== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
  text-align: left;
}

/* Unified Web Selectors and Password Inputs */
input[type="password"], 
input[type="text"], 
select {
  width: 100%;
  min-height: 46px; /* Optimized Apple Touch Target Standard */
  padding: 0.75rem 1rem;
  background: #11151f;
  border: 2px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  -webkit-appearance: none; /* Strips native iOS safari inner rendering anomalies */
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%234e6070' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'></polyline></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 2.5rem;
}

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Clean Custom Styled Invisible File Upload Setup */
.hidden-file-input {
  display: none !important;
}

.file-upload-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.75rem 1rem;
  background: #11151f;
  border: 2px dashed var(--border);
  color: var(--text-muted);
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.file-upload-label:hover {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(109, 40, 217, 0.05);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* Change style when file is selected */
.file-upload-label.file-selected {
  border-style: solid;
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  background: rgba(109, 40, 217, 0.08);
}

/* Toggle Switch Styling */
.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #11151f;
  border: 2px solid var(--border);
  transition: .3s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-muted);
  transition: .3s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #ffffff;
}

/* Password View-Toggle Design */
.password-wrapper {
  position: relative;
  width: 100%;
}

.password-wrapper input {
  padding-right: 4.5rem;
}

.password-toggle-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--accent-text);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 4px;
  transition: color 0.2s ease;
}

.password-toggle-btn:hover {
  color: #ffffff;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  width: 100%; /* Full span on mobile views ensures comfortable interaction */
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--accent);
  color: #ffffff;
  background: var(--accent);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(109, 40, 217, 0.2);
  transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1), 
              background-color 0.2s ease, 
              box-shadow 0.2s ease, 
              border-color 0.2s ease;
}

.btn:hover, .btn:active {
  background: transparent;
  color: var(--accent-text);
  box-shadow: 0 0 18px var(--accent-glow);
}

/* Active touch feedback compression for phones */
.btn:active {
  transform: scale(0.98);
}

/* ==========================================================================
   CONTENT CARDS & SYSTEM STATE TILES
   ========================================================================== */
.about-box, .custom-card, .store-card, .status-box {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: left;
  margin-top: 1.5rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.about-box h2, .custom-card h2 {
  color: var(--accent-text);
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.about-box p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Fluid Hover Integration across interaction targets */
.about-box:hover, .custom-card:hover, .store-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

/* ==========================================================================
   DYNAMIC APP SELECTION CARDS & DESCRIPTIONS
   ========================================================================== */
.app-desc-container {
  display: flex;
  gap: 1rem;
  background: #11151f;
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 1.15rem;
  margin-top: 1rem;
  align-items: flex-start;
  transition: all 0.25s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.app-desc-container:hover {
  border-color: rgba(109, 40, 217, 0.4);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.app-desc-icon {
  width: 64px;
  height: 64px;
  border-radius: 22%; /* Perfect iOS Apple Squircle Approximation */
  object-fit: cover;
  flex-shrink: 0;
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.app-desc-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.app-desc-title {
  font-weight: 700;
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 0.25rem;
  letter-spacing: 0.02em;
}

/* SideInstaller Wireless iOS Warning Flag */
.app-warning-box {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: 8px;
  color: #fca5a5;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1.4;
  animation: pulseWarning 2s infinite ease-in-out;
}

@keyframes pulseWarning {
  0%, 100% { border-color: rgba(239, 68, 68, 0.35); }
  50% { border-color: rgba(239, 68, 68, 0.6); }
}

/* Success View Customizations */
#success-view {
  animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   PROGRESS LOADING ARCHITECTURE
   ========================================================================== */
.progress-container {
  margin-top: 1.5rem;
  background: #0f131c;
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.progress-bar-bg {
  width: 100%;
  background: var(--bg);
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.progress-bar-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-text));
  border-radius: 999px;
}

.animate-pulse {
  animation: pulse 1.8s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

/* ==========================================================================
   CLIENT SIDE RENDERING CONTROLLERS (QR Blocks & Success Panels)
   ========================================================================== */
.success-card {
  border-color: rgba(16, 185, 129, 0.4);
  background: linear-gradient(to bottom, var(--card), rgba(16, 185, 129, 0.02));
}

.qr-wrapper {
  margin-top: 1rem;
  background: #ffffff;
  padding: 0.75rem;
  border-radius: 10px;
  display: inline-block;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Global Hidden Visibility Controller */
.hidden {
  display: none !important;
}

/* ==========================================================================
   BROWSER TAB ENGINE (Segmented Control Layouts)
   ========================================================================== */
.cert-tab-selector {
  display: flex;
  background: #11151f;
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 1rem;
}

.cert-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.65rem;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.25, 1, 0.5, 1);
}

.cert-tab-btn:hover {
  color: var(--text);
}

.cert-tab-btn.active {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* ==========================================================================
   SAVED CERTIFICATE GRID & SELECTION TILES (Aesthetic Boxes)
   ========================================================================== */
.cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* Match layout on wider viewports like tablets or PC screens */
@media (min-width: 480px) {
  .cert-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.cert-box {
  background: #11151f;
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  cursor: pointer;
  text-align: left;
  position: relative;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.cert-box:hover {
  border-color: rgba(109, 40, 217, 0.45);
}

.cert-box.selected {
  border-color: var(--accent);
  background: rgba(109, 40, 217, 0.08);
  box-shadow: 0 0 15px var(--accent-glow);
}

.cert-box-title {
  font-weight: 700;
  color: #ffffff;
  font-size: 0.95rem;
}

.cert-box-details {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 0.5rem;
  font-family: monospace;
}

.cert-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  border: 2px solid var(--accent);
  transition: background-color 0.2s ease;
}

.empty-certs-container {
  text-align: center;
  padding: 1.75rem 1rem;
  border: 2px dashed var(--border);
  border-radius: 10px;
  background: #0f131c;
}

/* ==========================================================================
   APPLE LIQUID GLASS BOTTOM NAVIGATION BAR
   ========================================================================== */
.liquid-nav {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  background: rgba(12, 15, 21, 0.55);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 40px;
  padding: 6px;
  gap: 8px;
  z-index: 1000;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6),
              inset 0 1px 2px rgba(255, 255, 255, 0.1);
  width: 250px; /* Structured physical scale constraint */
}

.liquid-nav-item {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 52px;
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 700;
  border-radius: 35px;
  transition: color 0.3s ease;
  cursor: pointer;
  z-index: 2;
  gap: 2px;
}

.liquid-nav-icon {
  font-size: 1.15rem;
}

.liquid-nav-label {
  font-size: 0.65rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.liquid-nav-item.active {
  color: #ffffff;
}

/* 3D Liquid Bubble Overlay (Featuring Custom Purple Overshadow & Fluid Neon Glow) */
.liquid-bubble {
  position: absolute;
  top: 6px;
  left: 6px;
  width: calc(50% - 10px); /* Split evenly minus localized gap allocations */
  height: 52px;
  border-radius: 35px;
  
  /* Dual physical refraction: Violet theme elements replace stark white highlights */
  background: radial-gradient(circle at 50% 12%, rgba(167, 139, 250, 0.4) 0%, rgba(167, 139, 250, 0) 70%),
              linear-gradient(to bottom, rgba(167, 139, 250, 0.15) 0%, rgba(109, 40, 217, 0.1) 50%, rgba(0, 0, 0, 0.4) 100%);
              
  box-shadow: inset 0 2px 4px rgba(167, 139, 250, 0.5),    /* Light violet lip shine */
              inset 0 -3px 6px rgba(0, 0, 0, 0.55),         /* Soft dense base shadows */
              inset 0 8px 18px rgba(109, 40, 217, 0.2),     /* Inside volume depth */
              0 8px 24px rgba(109, 40, 217, 0.55);          /* Underlying reactive purple neon cast */
              
  border: 1.5px solid rgba(167, 139, 250, 0.3);
  transition: transform 0.4s cubic-bezier(0.25, 1.15, 0.4, 1);
  pointer-events: none;
  z-index: 1;
}

/* Responsive Grid Engine adjustments for iPads/Tablets */
@media (min-width: 640px) {
  .container {
    padding: 3rem 2rem 120px;
  }
  .about-box, .custom-card {
    padding: 2rem;
  }
  .btn {
    width: auto;
    display: inline-flex;
  }
}