/**
 * TECH TOOLS — Spoločné dizajnové jadro (tool-base.css)
 * Zladené s TECH INFO Atlas a DATAcube dizajnovým systémom
 */

:root {
  --bg: #030712;
  --surface: rgba(17, 24, 39, 0.7);
  --surface-card: rgba(15, 23, 42, 0.65);
  --surface-elevated: rgba(30, 41, 59, 0.75);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-hover: rgba(99, 102, 241, 0.35);
  --border-active: rgba(59, 130, 246, 0.5);
  --text: #f9fafb;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --brand-blue: #3b82f6;
  --brand-purple: #8b5cf6;
  --gradient-brand: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --accent-green: #34d399;
  --destructive: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --shadow-glass: 0 10px 30px -5px rgba(0, 0, 0, 0.5), 0 0 30px -10px rgba(59, 130, 246, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   Dekoratívne svetelné pozadie (Mesh Glow)
   ============================================================ */
.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
}
.bg-glow-1 {
  position: fixed;
  top: -12vw;
  left: -8vw;
  width: 50vw;
  height: 50vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  filter: blur(80px);
  animation: float-glow-1 25s infinite alternate ease-in-out;
}
.bg-glow-2 {
  position: fixed;
  bottom: -10vw;
  right: -8vw;
  width: 48vw;
  height: 48vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.10) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  filter: blur(80px);
  animation: float-glow-2 20s infinite alternate ease-in-out;
}

@keyframes float-glow-1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(6%, 6%) scale(1.15); }
}
@keyframes float-glow-2 {
  0% { transform: translate(0, 0) scale(1.15); }
  100% { transform: translate(-6%, -6%) scale(0.95); }
}

/* Glassmorphism helpers */
.glass {
  background: var(--surface-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-glass);
}
.glass-strong {
  background: rgba(13, 19, 33, 0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border);
}

/* ============================================================
   Zjednotená ekosystémová hlavička nástroja
   ============================================================ */
.tool-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.tool-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.tool-nav-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}
.back-btn {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text-muted);
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.back-btn:hover {
  background: rgba(59, 130, 246, 0.12);
  color: #ffffff;
  border-color: rgba(59, 130, 246, 0.35);
  transform: translateX(-2px);
}
.back-btn svg {
  width: 1.15rem;
  height: 1.15rem;
}

/* Breadcrumbs */
.tool-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tool-breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.tool-breadcrumbs a:hover {
  color: #ffffff;
}
.tool-breadcrumbs .brand-tag {
  font-weight: 750;
  color: #ffffff;
  letter-spacing: -0.01em;
}
.tool-breadcrumbs .brand-tag .brand-dot {
  color: var(--brand-blue);
}
.tool-breadcrumbs .sep {
  color: var(--text-dim);
  font-size: 0.75rem;
}
.tool-breadcrumbs .category-label {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.tool-breadcrumbs .current-tool {
  color: #ffffff;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.tool-breadcrumbs .current-tool .tool-icon-mini {
  color: #60a5fa;
  display: inline-flex;
  vertical-align: middle;
}
.tool-breadcrumbs .current-tool .tool-icon-mini svg {
  width: 1.05rem;
  height: 1.05rem;
}

/* Right Nav Controls */
.tool-nav-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

/* Offline Pill Badge */
.badge-offline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.22);
  color: #34d399;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 99px;
  letter-spacing: 0.02em;
}
.badge-offline .dot-green {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.8);
}

/* Quick Tool Switcher Dropdown */
.tool-switcher-wrapper {
  position: relative;
}
.tool-switcher-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.38rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}
.tool-switcher-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
  color: #ffffff;
}
.tool-switcher-btn svg {
  width: 0.95rem;
  height: 0.95rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}
.tool-switcher-wrapper.open .tool-switcher-btn svg.chevron {
  transform: rotate(180deg);
}

.tool-switcher-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 320px;
  max-height: 480px;
  overflow-y: auto;
  background: rgba(13, 19, 33, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65), 0 0 35px -5px rgba(59, 130, 246, 0.25);
  padding: 0.6rem;
  display: none;
  flex-direction: column;
  gap: 0.35rem;
  z-index: 100;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}
.tool-switcher-wrapper.open .tool-switcher-dropdown {
  display: flex;
}
.switcher-group-title {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-dim);
  font-weight: 750;
  padding: 0.4rem 0.6rem 0.15rem;
}
.switcher-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  transition: all 0.15s ease;
}
.switcher-item:hover {
  background: rgba(59, 130, 246, 0.12);
  color: #ffffff;
}
.switcher-item.active {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  font-weight: 600;
}
.switcher-item-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  flex-shrink: 0;
}
.switcher-item-icon svg {
  width: 1.15rem;
  height: 1.15rem;
}

/* Labs link */
.tool-labs-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 550;
  text-decoration: none;
  transition: all 0.15s ease;
}
.tool-labs-link:hover {
  color: #ffffff;
  border-color: rgba(99, 102, 241, 0.4);
}
.tool-labs-link img {
  width: 14px;
  height: 14px;
}

/* ============================================================
   Hlavný layout nástroja (Workspace)
   ============================================================ */
.tool-main {
  flex: 1 0 auto;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.tool-main.narrow {
  max-width: 680px;
}
.tool-main.wide {
  max-width: 1100px;
}

/* Title block in tool */
.tool-title-block {
  margin-bottom: 0.5rem;
}
.tool-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.35rem;
}
.tool-heading {
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
.tool-heading-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  flex-shrink: 0;
}
.tool-heading-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}
.tool-description {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 700px;
}

/* Card & Surface */
.card {
  background: var(--surface-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-glass);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  border-color: rgba(255, 255, 255, 0.13);
}

.label {
  display: block;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 0.45rem;
}

/* Form Controls (Inputs, Selects, Textareas) */
input[type="text"],
input[type="number"],
input[type="password"],
input[type="search"],
textarea,
select {
  width: 100%;
  background: rgba(10, 15, 29, 0.7);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: #ffffff;
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}
input[type="text"]:focus,
input[type="number"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
  border-color: #60a5fa;
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.22);
  background: rgba(13, 20, 38, 0.85);
}
input::placeholder,
textarea::placeholder {
  color: rgba(148, 163, 184, 0.4);
}
.input-mono {
  font-family: var(--font-mono) !important;
}

/* Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
  margin: 0.65rem 0;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #60a5fa;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(96, 165, 250, 0.6);
  transition: transform 0.15s ease, background 0.15s ease;
}
input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: #93c5fd;
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 650;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.32);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
}
.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: var(--border-hover);
  color: #ffffff;
}

/* Universal Copy Button */
.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.32rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-copy:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
}
.btn-copy.copied {
  background: rgba(52, 211, 153, 0.15) !important;
  color: #34d399 !important;
  border-color: rgba(52, 211, 153, 0.4) !important;
}
.btn-copy svg {
  width: 14px;
  height: 14px;
}

/* Result rows / Tables */
.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.result-row:last-child {
  border-bottom: none;
}
.result-key {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}
.result-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #60a5fa;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Toast Notification */
.tool-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: #ffffff;
  padding: 0.6rem 1.15rem;
  border-radius: 99px;
  font-size: 0.84rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 20px rgba(52, 211, 153, 0.2);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}
.tool-toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.tool-toast .toast-icon {
  color: #34d399;
}

/* Error message */
.error {
  font-size: 0.88rem;
  color: var(--destructive);
  font-weight: 600;
}

/* ============================================================
   Pätička nástroja (Footer)
   ============================================================ */
.ti-footer {
  margin-top: auto;
  padding: 2.25rem 1.25rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border);
  background: rgba(3, 7, 18, 0.5);
}
.ti-footer-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}
.ti-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}
.ti-footer-logo {
  height: 1.85rem;
  width: auto;
  filter: brightness(1.05);
  transition: all 0.2s ease;
}
.ti-footer-brand:hover .ti-footer-logo {
  filter: brightness(1.25);
  transform: scale(1.04);
}
.ti-footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.ti-footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 550;
  transition: color 0.15s ease;
}
.ti-footer-links a:hover {
  color: #ffffff;
}
.ti-footer-copy {
  font-size: 0.74rem;
  color: var(--text-dim);
}

/* ============================================================
   Vodoznak & Registrácia / Stav používateľa (Shared)
   ============================================================ */
.watermark-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08) 0%, rgba(217, 119, 6, 0.03) 100%);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.watermark-banner-content {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.watermark-banner-icon {
  flex-shrink: 0;
  color: #f59e0b;
  margin-top: 2px;
}
.watermark-banner-body {
  flex: 1;
  min-width: 0;
}
.watermark-banner-title {
  font-size: 0.84rem;
  font-weight: 700;
  color: #fbbf24;
  margin-bottom: 0.25rem;
  line-height: 1.35;
}
.watermark-banner-text {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0;
}
.watermark-banner-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.65rem;
}
.wm-btn-register {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.76rem;
  font-weight: 650;
  color: #ffffff;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border: 1px solid rgba(59, 130, 246, 0.4);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.15s ease;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}
.wm-btn-register:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-1px);
}
.wm-btn-login {
  font-size: 0.76rem;
  font-weight: 600;
  color: #94a3b8;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}
.wm-btn-login:hover {
  color: #ffffff;
}

.logged-in-badge {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  color: #a7f3d0;
}
.logged-in-badge svg {
  flex-shrink: 0;
  color: #10b981;
}
.logged-in-badge strong {
  color: #ffffff;
}

/* ============================================================
   Responzívne prispôsobenie
   ============================================================ */
@media (max-width: 768px) {
  .tool-header-inner {
    padding: 0.65rem 1rem;
  }
  .tool-breadcrumbs .category-label,
  .tool-breadcrumbs .sep:nth-of-type(2) {
    display: none;
  }
  .badge-offline span.text {
    display: none;
  }
  .badge-offline {
    padding: 0.35rem;
  }
  .tool-main {
    padding: 1.5rem 1rem 2.5rem;
    gap: 1rem;
  }
  .card {
    padding: 1.15rem;
  }
}

@media (max-width: 520px) {
  .tool-breadcrumbs .brand-tag {
    display: none;
  }
  .tool-breadcrumbs .sep:nth-of-type(1) {
    display: none;
  }
  .tool-switcher-btn span.btn-text {
    display: none;
  }
  .tool-switcher-btn {
    padding: 0.4rem;
  }
  .tool-switcher-dropdown {
    width: calc(100vw - 24px);
    right: -50px;
  }
  .tool-labs-link span {
    display: none;
  }
  .tool-labs-link {
    padding: 0.4rem;
  }
}