/* ================================================================
   PRC Theme — main.css
   Design system: tokens, reset, typography, layout, header, footer,
   buttons, forms, global components.
   ================================================================ */

/* ─── @font-face (self-hosted, GDPR compliant) ─── */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/space-grotesk-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('../fonts/source-sans-3-latin.woff2') format('woff2');
}

/* ─── Design Tokens — Bold & Vivid ─── */
:root {
  /* Base — near-black */
  --color-base-950: #09090B;
  --color-base-900: #0F0F12;
  --color-base-800: #18181B;
  --color-base-700: #27272A;

  /* Surface — light sections */
  --color-surface:        #FAFAFA;
  --color-surface-alt:    #F4F4F5;
  --color-surface-border: #E4E4E7;

  /* Brand Gradient — signature */
  --color-violet:  #7C3AED;
  --color-coral:   #F43F5E;
  --color-amber:   #F59E0B;
  --gradient-brand: linear-gradient(135deg, #7C3AED, #F43F5E, #F59E0B);
  --gradient-brand-subtle: linear-gradient(135deg, rgba(124,58,237,0.12), rgba(244,63,94,0.12), rgba(245,158,11,0.06));

  /* CTA */
  --color-cta:       #F43F5E;
  --color-cta-hover:  #E11D48;
  --color-cta-glow:  rgba(244, 63, 94, 0.4);

  /* Semantic */
  --color-danger-600:  #A32D2D;
  --color-danger-500:  #E24B4A;
  --color-danger-100:  #FDE8E8;
  --color-warning-600: #C27A0E;
  --color-warning-500: #EF9F27;
  --color-warning-100: #FEF3D6;
  --color-success-600: #276749;
  --color-success-500: #38A169;
  --color-success-100: #E6F6ED;

  /* Text */
  --color-text-on-dark:       #FAFAFA;
  --color-text-on-dark-muted: rgba(250,250,250,0.6);
  --color-text-on-light:      #18181B;
  --color-text-on-light-muted: #71717A;

  /* Legacy neutral aliases (for blog.css compatibility) */
  --color-neutral-950: #09090B;
  --color-neutral-800: #18181B;
  --color-neutral-600: #52525B;
  --color-neutral-400: #A1A1AA;
  --color-neutral-300: #D4D4D8;
  --color-neutral-200: #E4E4E7;
  --color-neutral-100: #F4F4F5;
  --color-neutral-50:  #FAFAFA;
  --color-white:       #FFFFFF;

  /* Legacy accent aliases */
  --color-primary-900: #09090B;
  --color-primary-800: #18181B;
  --color-primary-500: #7C3AED;
  --color-primary-400: #8B5CF6;
  --color-primary-200: #C4B5FD;
  --color-primary-50:  #F5F3FF;
  --color-accent-500:  #F43F5E;
  --color-accent-400:  #FB7185;

  /* Typography */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body:    'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-display:  clamp(2.5rem, 5.5vw, 3.75rem);
  --text-h1:       clamp(2rem, 4vw, 2.75rem);
  --text-h2:       clamp(1.5rem, 3vw, 2.1rem);
  --text-h3:       1.35rem;
  --text-h4:       1.125rem;
  --text-body:     1rem;
  --text-body-sm:  0.875rem;
  --text-caption:  0.75rem;

  /* 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;

  /* Border Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs:   0 1px 2px rgba(13,15,18,0.05);
  --shadow-sm:   0 1px 3px rgba(13,15,18,0.08), 0 1px 2px rgba(13,15,18,0.04);
  --shadow-md:   0 4px 6px rgba(13,15,18,0.06), 0 2px 4px rgba(13,15,18,0.04);
  --shadow-lg:   0 10px 15px rgba(13,15,18,0.07), 0 4px 6px rgba(13,15,18,0.04);
  --shadow-card: 0 1px 3px rgba(13,15,18,0.06), 0 0 0 1px rgba(13,15,18,0.04);
  --shadow-card-hover: 0 8px 16px rgba(13,15,18,0.08), 0 0 0 1px rgba(30,58,138,0.12);
  --shadow-card-premium: 0 0 0 1px rgba(0,0,0,0.03), 0 2px 4px rgba(0,0,0,0.05), 0 12px 24px rgba(0,0,0,0.05);
  --shadow-card-premium-hover: 0 0 0 1px rgba(30,58,138,0.08), 0 4px 8px rgba(0,0,0,0.06), 0 24px 48px rgba(0,0,0,0.08);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
  --transition-base: 200ms cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 300ms cubic-bezier(0.4,0,0.2,1);

  /* Layout */
  --max-width-content: 1120px;
  --max-width-narrow:  780px;
  --max-width-wide:    1280px;
  --max-width-prose:   720px;
}

/* ─── Reset ─── */
*, *::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-body);
  font-size: var(--text-body);
  color: var(--color-text-on-light);
  background: var(--color-surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

ul, ol {
  list-style: none;
}

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-neutral-950);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); margin-bottom: var(--space-4); }
h3 { font-size: var(--text-h3); font-weight: 600; margin-bottom: var(--space-2); }
h4 { font-size: var(--text-h4); font-weight: 600; margin-bottom: var(--space-2); }

p {
  color: var(--color-neutral-600);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

strong {
  color: var(--color-neutral-950);
  font-weight: 600;
}

/* ─── Layout ─── */
.prc-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.prc-container--narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.prc-container--wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.prc-section {
  padding: var(--space-20) 0;
}

.prc-section + .prc-section {
  border-top: none;
}

/* ─── Dark Section Utility ─── */
.prc-section--dark {
  background: var(--color-base-950);
  color: var(--color-text-on-dark);
}

.prc-section--dark h2,
.prc-section--dark h3,
.prc-section--dark strong {
  color: var(--color-text-on-dark);
}

.prc-section--dark p,
.prc-section--dark .prc-lead {
  color: var(--color-text-on-dark-muted);
}

.prc-section--dark .prc-section-label {
  color: var(--color-coral);
}

.prc-section--dark .prc-section-label::before {
  background: var(--color-coral);
}

/* Gradient band between dark and light sections */
.prc-section--dark + .prc-section {
  border-top: 2px solid;
  border-image: var(--gradient-brand) 1;
}

/* ─── Header ─── */
.prc-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(9,9,11,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-3) 0;
}

.prc-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.prc-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-body-sm);
  font-weight: 700;
  color: var(--color-text-on-dark);
  text-decoration: none;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.prc-header__logo:hover {
  color: var(--color-coral);
}

.prc-header__logo svg {
  width: 28px;
  height: 31px;
}

.prc-header__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.prc-header__nav {
  display: none;
}

.prc-header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(250,250,250,0.7);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.prc-header__toggle:hover {
  background: rgba(255,255,255,0.08);
  color: var(--color-text-on-dark);
}

.prc-header__toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Mobile menu open state */
.prc-header__nav.is-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(9,9,11,0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-4) var(--space-6);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.prc-header__nav.is-open .prc-nav-list__cta {
  margin-left: 0;
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.prc-header__nav.is-open .prc-nav-cta {
  display: flex;
  justify-content: center;
  width: 100%;
}

.prc-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.prc-nav-list li a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: rgba(250,250,250,0.6);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.prc-nav-list li a:hover,
.prc-nav-list li.current-menu-item a {
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.08);
}

/* Nav CTA button */
.prc-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-white) !important;
  background: var(--color-cta);
  padding: 8px var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 0 16px rgba(244,63,94,0.25);
  white-space: nowrap;
}

.prc-nav-cta:hover {
  background: var(--color-cta-hover);
  color: var(--color-white) !important;
  box-shadow: 0 0 24px rgba(244,63,94,0.4);
}

.prc-nav-list__cta {
  margin-left: var(--space-2);
}

/* Language switcher (select dropdown) */
.prc-lang-switcher {
  display: flex;
  align-items: center;
}

.prc-lang-switcher__select {
  font-family: var(--font-heading);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-neutral-400);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  padding: 6px var(--space-8) 6px var(--space-3);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23A1A1AA' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.prc-lang-switcher__select:hover {
  border-color: rgba(255,255,255,0.25);
  color: var(--color-text-on-dark);
}

.prc-lang-switcher__select:focus-visible {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

.prc-lang-switcher__select option {
  background: var(--color-base-900);
  color: var(--color-text-on-dark);
}

/* ─── Contact section ─── */
.prc-section--contact {
  border-top: 1px solid rgba(255,255,255,0.06);
}
.prc-contact-form {
  margin-top: var(--space-8);
}

/* ─── Footer ─── */
.prc-footer {
  background: var(--color-base-900);
  color: var(--color-white);
  padding: var(--space-16) 0 var(--space-10);
  border-top: 2px solid;
  border-image: var(--gradient-brand) 1;
}

.prc-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-10);
}

.prc-footer__brand-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-body-sm);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.prc-footer__brand-logo svg {
  width: 24px;
  height: 27px;
}

.prc-footer__about {
  font-size: var(--text-body-sm);
  color: var(--color-neutral-400);
  line-height: 1.6;
}

.prc-footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-caption);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-neutral-400);
  margin-bottom: var(--space-4);
}

.prc-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.prc-footer__links a {
  font-size: var(--text-body-sm);
  color: var(--color-neutral-400);
  transition: color var(--transition-fast);
}

.prc-footer__links a:hover {
  color: var(--color-white);
}

.prc-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-6);
}

.prc-footer__credits-link {
  font-size: var(--text-caption);
  margin-bottom: var(--space-3);
}

.prc-footer__credits-link a {
  color: var(--color-neutral-400);
  text-decoration: none;
  transition: color 0.2s ease;
}

.prc-footer__credits-link a:hover {
  color: var(--color-primary-400);
}

.prc-footer__disclaimer {
  font-size: var(--text-caption);
  color: var(--color-neutral-400);
  line-height: 1.5;
  max-width: 100%;
  opacity: 0.7;
}

/* ─── Buttons ─── */
.prc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  min-height: 48px;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform 100ms ease;
  letter-spacing: -0.01em;
  box-shadow: var(--shadow-sm);
}

.prc-btn:active {
  transform: scale(0.98);
}

.prc-btn--primary {
  background: var(--color-cta);
  color: var(--color-white);
}

.prc-btn--primary:hover {
  background: var(--color-cta-hover);
  color: var(--color-white);
}

.prc-btn--secondary {
  background: transparent;
  color: var(--color-primary-500);
  border: 1.5px solid var(--color-primary-500);
}

.prc-btn--secondary:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-500);
}

.prc-btn__arrow {
  font-size: 1.1em;
  transition: transform var(--transition-fast);
}

.prc-btn:hover .prc-btn__arrow {
  transform: translateX(3px);
}

/* ─── Badges / Pills ─── */
.prc-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-caption);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-neutral-200);
  color: var(--color-neutral-600);
  background: var(--color-neutral-50);
}

.prc-badge--regs {
  color: var(--color-primary-500);
  background: var(--color-primary-50);
  border-color: var(--color-primary-200);
}

.prc-badge--danger {
  color: var(--color-danger-600);
  background: var(--color-danger-100);
  border-color: transparent;
}

.prc-badge--warning {
  color: var(--color-warning-600);
  background: var(--color-warning-100);
  border-color: transparent;
}

.prc-badge--success {
  color: var(--color-success-600);
  background: var(--color-success-100);
  border-color: transparent;
}

/* ─── Section Label (overline) ─── */
.prc-section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-caption);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-danger-600);
  margin-bottom: var(--space-4);
}

.prc-section-label::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-danger-500);
  border-radius: 1px;
}

/* ─── Cards ─── */
.prc-card {
  background: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base);
}

.prc-card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* ─── Screen Reader Only ─── */
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  word-wrap: normal !important;
}

.screen-reader-text:focus {
  background-color: var(--color-white);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  clip: auto !important;
  color: var(--color-primary-500);
  display: block;
  font-size: var(--text-body-sm);
  font-weight: 600;
  height: auto;
  left: 5px;
  line-height: normal;
  padding: var(--space-3) var(--space-6);
  text-decoration: none;
  top: 5px;
  width: auto;
  z-index: 100000;
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ─── Responsive ─── */
@media (min-width: 768px) {
  .prc-header__toggle {
    display: none;
  }

  .prc-header__nav {
    display: flex;
  }

  .prc-nav-list {
    flex-direction: row;
    gap: 0;
  }

  .prc-nav-list li a {
    padding: var(--space-2) var(--space-3);
  }
}

@media (max-width: 768px) {
  .prc-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  .prc-section {
    padding: var(--space-12) 0;
  }
}