/* ===== TVCR PRO — Design Tokens ===== */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* 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;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Font families */
  --font-display: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

/* ===== DARK MODE (Default) ===== */
:root, [data-theme="dark"] {
  --color-bg:             #0F0F0F;
  --color-surface:        #161616;
  --color-surface-2:      #1C1C1C;
  --color-surface-3:      #242424;
  --color-divider:        #2A2A2A;
  --color-border:         #333333;

  --color-text:           #E8E8E8;
  --color-text-muted:     #999999;
  --color-text-faint:     #666666;
  --color-text-inverse:   #0F0F0F;

  /* Primary: Teal */
  --color-primary:        #20808D;
  --color-primary-hover:  #2A9DAC;
  --color-primary-active: #178090;
  --color-primary-light:  rgba(32, 128, 141, 0.12);

  /* Gold accent */
  --color-gold:           #D4AF37;
  --color-gold-hover:     #E0C055;
  --color-gold-light:     rgba(212, 175, 55, 0.12);

  /* Status */
  --color-success:        #4CAF50;
  --color-warning:        #F59E0B;
  --color-error:          #EF4444;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* ===== LIGHT MODE ===== */
[data-theme="light"] {
  --color-bg:             #F5F5F3;
  --color-surface:        #FFFFFF;
  --color-surface-2:      #F0F0EE;
  --color-surface-3:      #E8E8E5;
  --color-divider:        #E0E0DD;
  --color-border:         #D0D0CC;

  --color-text:           #1A1A1A;
  --color-text-muted:     #666666;
  --color-text-faint:     #999999;
  --color-text-inverse:   #F5F5F3;

  --color-primary:        #1A6E78;
  --color-primary-hover:  #145B64;
  --color-primary-active: #0F4850;
  --color-primary-light:  rgba(26, 110, 120, 0.08);

  --color-gold:           #B8962E;
  --color-gold-hover:     #9E7E20;
  --color-gold-light:     rgba(184, 150, 46, 0.08);

  --color-success:        #2E7D32;
  --color-warning:        #D97706;
  --color-error:          #DC2626;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

/* ===== LAYOUT ===== */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--narrow {
  max-width: var(--content-default);
}

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
}

.header__logo svg {
  flex-shrink: 0;
}

.header__logo-text {
  letter-spacing: 0.05em;
}

.header__logo-text span {
  color: var(--color-primary);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__link {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-interactive);
  position: relative;
}

.header__link:hover,
.header__link--active {
  color: var(--color-text);
}

.header__link--active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Mobile nav */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}
.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-full);
  transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}
.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 768px) {
  .header__nav {
    position: fixed;
    inset: 4rem 0 0 0;
    flex-direction: column;
    background: var(--color-bg);
    padding: var(--space-8) var(--space-4);
    gap: var(--space-4);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
    z-index: 99;
  }
  .header__nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .header__nav .header__link {
    font-size: var(--text-base);
    padding: var(--space-2) 0;
  }
  .mobile-toggle { display: flex; }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-interactive);
  cursor: pointer;
  white-space: nowrap;
  border: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--primary:active {
  transform: translateY(0);
}

.btn--gold {
  background: var(--color-gold);
  color: #1A1A1A;
}
.btn--gold:hover {
  background: var(--color-gold-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
}
.btn--ghost:hover {
  background: var(--color-primary-light);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ===== CARDS ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.card--hover:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card--gold {
  border-color: rgba(212, 175, 55, 0.25);
}
.card--gold:hover {
  border-color: var(--color-gold);
}

/* ===== SECTION TITLES ===== */
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
}

.footer__inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
}

.footer__brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-3);
  max-width: 36ch;
}

.footer__heading {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-interactive);
}
.footer__links a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
  padding-top: var(--space-8);
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .footer__bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}

/* ===== DATA PRIVACY TRUST BADGE ===== */
.privacy-badge {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  z-index: 900;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: default;
  transition: all var(--transition-interactive);
  text-decoration: none;
}
.privacy-badge:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.privacy-badge svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

/* Privacy section in footer */
.footer__privacy {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
.privacy-commitments {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
@media (max-width: 768px) {
  .privacy-commitments {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
}
@media (max-width: 480px) {
  .privacy-commitments {
    grid-template-columns: 1fr;
  }
}
.privacy-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.privacy-item svg {
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}
.privacy-item strong {
  color: var(--color-text);
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

/* ===== SCROLL REVEAL ===== */
.fade-in {
  opacity: 1;
}
@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}
@keyframes reveal-fade {
  to { opacity: 1; }
}

/* JS fallback for browsers without scroll-driven animations */
.fade-in-js {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.fade-in-js.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== BADGE ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge--gold {
  background: var(--color-gold-light);
  color: var(--color-gold);
}

/* ===== FORMULA ===== */
.formula-block {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  text-align: center;
  overflow-x: auto;
}

/* ===== STEPPER ===== */
.stepper {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
}

.step__number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.step__content h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.step__content p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ===== SCORE SCALE ===== */
.score-scale {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.score-item {
  flex: 1;
  min-width: 120px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
}

.score-item--vh { background: rgba(76, 175, 80, 0.15); color: #4CAF50; }
.score-item--h  { background: rgba(139, 195, 74, 0.15); color: #8BC34A; }
.score-item--m  { background: rgba(245, 158, 11, 0.15); color: #F59E0B; }
.score-item--l  { background: rgba(239, 68, 68, 0.15); color: #EF4444; }
.score-item--mn { background: rgba(156, 163, 175, 0.15); color: #9CA3AF; }

/* ===== GRID UTILITIES ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ===== CONTACT FORM ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-input,
.form-textarea,
.form-select {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== MISC ===== */
.text-gold { color: var(--color-gold); }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.gap-4 { gap: var(--space-4); }