/* =========================================================
   VPC Tool — JustPure Holding
   style.css — Kompletní styly pro index.html i vpc.html
   ========================================================= */

/* ─────────────────────────────────────────────
   1. CSS Custom Properties (Design Tokens)
   ───────────────────────────────────────────── */
:root {
  /* Barvy */
  --color-bg:            #0a0a0f;
  --color-bg-secondary:  #111118;
  --color-bg-card:       #16161f;
  --color-bg-card-hover: #1c1c28;
  --color-border:        #2a2a3a;
  --color-border-light:  #353548;

  --color-primary:       #6c63ff;
  --color-primary-light: #8b85ff;
  --color-primary-dark:  #4d46cc;
  --color-accent:        #00d4aa;
  --color-accent-light:  #00f0c0;
  --color-danger:        #ff4757;
  --color-warning:       #ffa502;
  --color-success:       #2ed573;

  --color-text:          #e8e8f0;
  --color-text-muted:    #8888aa;
  --color-text-faint:    #555570;

  /* Gradienty */
  --gradient-primary:    linear-gradient(135deg, #6c63ff 0%, #00d4aa 100%);
  --gradient-card:       linear-gradient(145deg, #16161f 0%, #1a1a28 100%);
  --gradient-hero:       radial-gradient(ellipse at 50% 0%, rgba(108,99,255,0.15) 0%, transparent 60%);
  --gradient-glow:       radial-gradient(ellipse at center, rgba(108,99,255,0.08) 0%, transparent 70%);

  /* Segment barvy */
  --seg-1-color:         #6c63ff;
  --seg-1-bg:            rgba(108,99,255,0.08);
  --seg-1-border:        rgba(108,99,255,0.3);
  --seg-2-color:         #00d4aa;
  --seg-2-bg:            rgba(0,212,170,0.08);
  --seg-2-border:        rgba(0,212,170,0.3);
  --seg-3-color:         #ff6b6b;
  --seg-3-bg:            rgba(255,107,107,0.08);
  --seg-3-border:        rgba(255,107,107,0.3);

  /* Journey fáze barvy */
  --journey-awareness:    #6c63ff;
  --journey-consideration:#a855f7;
  --journey-decision:     #00d4aa;
  --journey-retention:    #ffa502;
  --journey-advocacy:     #2ed573;

  /* Typografie */
  --font-sans:    'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --font-normal:   400;
  --font-medium:   500;
  --font-semibold: 600;
  --font-bold:     700;
  --font-black:    900;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border radius */
  --radius-sm:   0.375rem;
  --radius-md:   0.625rem;
  --radius-lg:   0.875rem;
  --radius-xl:   1.25rem;
  --radius-2xl:  1.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:    0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow:  0 0 32px rgba(108,99,255,0.2);
  --shadow-card:  0 4px 24px rgba(0,0,0,0.4), 0 1px 4px rgba(0,0,0,0.3);

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
}

/* ─────────────────────────────────────────────
   2. CSS Reset & Base
   ───────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ─────────────────────────────────────────────
   3. Layout Utilities
   ───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--wide {
  max-width: var(--container-wide);
}

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

/* Background dekorativní efekty */
.page-wrapper::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    var(--gradient-hero),
    var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

.main-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

/* ─────────────────────────────────────────────
   4. Header
   ───────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-bold);
  text-decoration: none;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-black);
  color: white;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.logo-text {
  font-size: var(--text-base);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo-accent {
  color: var(--color-primary-light);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-bg-card);
  border-color: var(--color-border);
}

/* ─────────────────────────────────────────────
   5. Hero Section (index.html)
   ───────────────────────────────────────────── */
.hero {
  padding: var(--space-20) 0 var(--space-16);
  text-align: center;
  position: relative;
}

.hero-inner {
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-primary-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary-light);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

.hero-title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: var(--font-black);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-10);
  max-width: 560px;
  margin-inline: auto;
}

/* ─────────────────────────────────────────────
   6. Form Card (index.html)
   ───────────────────────────────────────────── */
.form-section {
  padding-bottom: var(--space-20);
}

.form-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-card);
  max-width: 640px;
  margin-inline: auto;
  position: relative;
  overflow: hidden;
}

.form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.form-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.form-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  letter-spacing: 0.02em;
}

.form-label span {
  color: var(--color-danger);
  margin-left: 2px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: var(--space-4);
  color: var(--color-text-faint);
  font-size: var(--text-base);
  pointer-events: none;
  z-index: 1;
}

.form-input {
  width: 100%;
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-10);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: all var(--transition-base);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-primary);
  background: rgba(108,99,255,0.06);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}

.form-input::placeholder {
  color: var(--color-text-faint);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger);
  margin-top: var(--space-2);
  display: none;
}

.form-error.visible {
  display: block;
}

/* Submit tlačítko */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-lg);
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  width: 100%;
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(108,99,255,0.35);
  margin-top: var(--space-6);
  letter-spacing: 0.01em;
}

.btn--primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(108,99,255,0.45);
}

.btn--primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(108,99,255,0.3);
}

.btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn--secondary {
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  color: var(--color-text);
  border-color: var(--color-border-light);
  background: var(--color-bg-card-hover);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn--loading .btn-spinner {
  display: block;
}

.btn--loading .btn-text {
  opacity: 0.8;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─────────────────────────────────────────────
   7. Progress / Status (sdílené)
   ───────────────────────────────────────────── */
.status-area {
  margin-top: var(--space-8);
  display: none;
}

.status-area.visible {
  display: block;
}

.status-card {
  background: rgba(108,99,255,0.06);
  border: 1px solid rgba(108,99,255,0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.status-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}

.status-content {
  flex: 1;
}

.status-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.status-message {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Stavy */
.status-card--processing {
  border-color: rgba(108,99,255,0.3);
  background: rgba(108,99,255,0.06);
}

.status-card--success {
  border-color: rgba(46,213,115,0.3);
  background: rgba(46,213,115,0.06);
}

.status-card--error {
  border-color: rgba(255,71,87,0.3);
  background: rgba(255,71,87,0.06);
}

/* Progress bar */
.progress-bar-wrapper {
  margin-top: var(--space-3);
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width var(--transition-slow);
  animation: progress-shimmer 2s ease-in-out infinite;
  background-size: 200% 100%;
}

@keyframes progress-shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ─────────────────────────────────────────────
   8. Features Grid (index.html)
   ───────────────────────────────────────────── */
.features-section {
  padding: var(--space-12) 0 var(--space-20);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-border-light);
  background: var(--color-bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: var(--space-3);
  display: block;
}

.feature-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ─────────────────────────────────────────────
   9. VPC Results Page (vpc.html) — hlavička
   ───────────────────────────────────────────── */
.vpc-page-hero {
  padding: var(--space-12) 0 var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.vpc-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.vpc-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.vpc-badge--domain {
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.25);
  color: var(--color-primary-light);
}

.vpc-badge--date {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.vpc-page-title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--font-black);
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.15;
}

.vpc-page-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.65;
}

.vpc-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

/* ─────────────────────────────────────────────
   10. Section Headers
   ───────────────────────────────────────────── */
.section-header {
  margin-bottom: var(--space-8);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  margin-bottom: var(--space-3);
}

.section-label::before {
  content: '';
  display: block;
  width: 16px;
  height: 2px;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
}

.section-title {
  font-size: clamp(var(--text-xl), 3vw, var(--text-3xl));
  font-weight: var(--font-bold);
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ─────────────────────────────────────────────
   11. VPC Section wrappers
   ───────────────────────────────────────────── */
.vpc-section {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
}

.vpc-section:last-child {
  border-bottom: none;
}

/* ─────────────────────────────────────────────
   12. Segment Tabs Navigation
   ───────────────────────────────────────────── */
.segment-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.segment-tab {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.segment-tab:hover {
  border-color: var(--color-border-light);
  color: var(--color-text);
}

.segment-tab.active {
  color: white;
}

.segment-tab[data-seg="0"].active {
  background: var(--seg-1-color);
  border-color: var(--seg-1-color);
  box-shadow: 0 4px 16px rgba(108,99,255,0.35);
}

.segment-tab[data-seg="1"].active {
  background: var(--seg-2-color);
  border-color: var(--seg-2-color);
  box-shadow: 0 4px 16px rgba(0,212,170,0.3);
}

.segment-tab[data-seg="2"].active {
  background: var(--seg-3-color);
  border-color: var(--seg-3-color);
  box-shadow: 0 4px 16px rgba(255,107,107,0.3);
}

/* ─────────────────────────────────────────────
   13. Segment Panel
   ───────────────────────────────────────────── */
.segment-panel {
  display: none;
  animation: fadeIn var(--transition-base) forwards;
}

.segment-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Grid segmentu — 2 sloupce: Customer Profile | Value Proposition */
.segment-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (max-width: 900px) {
  .segment-grid {
    grid-template-columns: 1fr;
  }
}

/* ─────────────────────────────────────────────
   14. Segment Half Cards (Customer Profile / Value Prop)
   ───────────────────────────────────────────── */
.half-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.half-card__header {
  padding: var(--space-5) var(--space-6