/* ============================================
   TWEETICIDE.COM — Style System
   Dark, editorial, tabloid-inspired.
   ============================================ */

: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);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* 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);

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

  /* Fonts */
  --font-display: 'Clash Display', 'Impact', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

/* ---- DARK THEME (Default) ---- */
:root, [data-theme="dark"] {
  --color-bg:             #0a0a0a;
  --color-surface:        #111111;
  --color-surface-2:      #1a1a1a;
  --color-surface-offset: #141414;
  --color-surface-offset-2: #1e1e1e;
  --color-surface-dynamic: #252525;
  --color-divider:        #2a2a2a;
  --color-border:         #333333;

  --color-text:           #e8e6e3;
  --color-text-muted:     #8a8885;
  --color-text-faint:     #555350;
  --color-text-inverse:   #0a0a0a;

  --color-primary:        #e53935;
  --color-primary-hover:  #ff5252;
  --color-primary-active: #c62828;
  --color-primary-highlight: #3d1a1a;

  --color-warning:        #ff9800;
  --color-error:          #e53935;
  --color-success:        #4caf50;

  --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 THEME ---- */
[data-theme="light"] {
  --color-bg:             #f5f3f0;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafaf8;
  --color-surface-offset: #eceae6;
  --color-surface-offset-2: #e5e3df;
  --color-surface-dynamic: #dddbd7;
  --color-divider:        #d0cec9;
  --color-border:         #c5c3be;

  --color-text:           #1a1816;
  --color-text-muted:     #6b6966;
  --color-text-faint:     #a09e9a;
  --color-text-inverse:   #f5f3f0;

  --color-primary:        #c62828;
  --color-primary-hover:  #e53935;
  --color-primary-active: #a31616;
  --color-primary-highlight: #fde8e8;

  --color-warning:        #e65100;
  --color-error:          #c62828;
  --color-success:        #2e7d32;

  --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);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #f5f3f0;
    --color-surface:        #ffffff;
    --color-surface-2:      #fafaf8;
    --color-surface-offset: #eceae6;
    --color-surface-offset-2: #e5e3df;
    --color-surface-dynamic: #dddbd7;
    --color-divider:        #d0cec9;
    --color-border:         #c5c3be;

    --color-text:           #1a1816;
    --color-text-muted:     #6b6966;
    --color-text-faint:     #a09e9a;
    --color-text-inverse:   #f5f3f0;

    --color-primary:        #c62828;
    --color-primary-hover:  #e53935;
    --color-primary-active: #a31616;
    --color-primary-highlight: #fde8e8;

    --color-warning:        #e65100;
    --color-error:          #c62828;
    --color-success:        #2e7d32;

    --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 {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

/* ============================================
   HEADER
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-4);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
}

.header__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1;
}

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

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

.header__nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.header__nav-link:hover {
  color: var(--color-primary);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-dynamic);
}

.header__submit-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease;
}

.header__submit-btn:hover {
  color: var(--color-primary);
  background: var(--color-surface-dynamic);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center top, oklch(from var(--color-primary) l c h / 0.08), transparent 70%);
  pointer-events: none;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin-bottom: var(--space-6);
  position: relative;
}

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

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  position: relative;
}

.hero__count {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  position: relative;
}

.hero__count strong {
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--text-lg);
}

/* ============================================
   FILTER BAR
   ============================================ */
.filter-bar {
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  margin-bottom: var(--space-8);
}

.filter-bar__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.filter-bar__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.filter-btn {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-weight: 500;
  cursor: pointer;
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ============================================
   CARD GRID
   ============================================ */
.grid-section {
  padding-block: clamp(var(--space-8), 6vw, var(--space-16));
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}

/* ============================================
   TWEETICIDE CARD
   ============================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.card__header {
  padding: var(--space-5) var(--space-5) var(--space-3);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.card__avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-surface-dynamic);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  border: 2px solid var(--color-border);
}

.card__meta {
  flex: 1;
  min-width: 0;
}

.card__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.card__role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.card__tweet {
  padding: var(--space-3) var(--space-5);
}

.card__tweet-box {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  position: relative;
}

.card__tweet-box::before {
  content: '\201C';
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  opacity: 0.4;
  position: absolute;
  top: var(--space-1);
  left: var(--space-3);
  line-height: 1;
}

.card__tweet-text {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text);
  padding-left: var(--space-5);
  font-style: italic;
}

.card__body {
  padding: var(--space-3) var(--space-5) var(--space-5);
}

.card__consequence {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: var(--space-3);
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.card__year {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.card__severity {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.severity--career-ending {
  background: oklch(from var(--color-primary) l c h / 0.15);
  color: var(--color-primary);
}

.severity--major {
  background: oklch(from var(--color-warning) l c h / 0.15);
  color: var(--color-warning);
}

.severity--recovered {
  background: oklch(from var(--color-success) l c h / 0.15);
  color: var(--color-success);
}

.card__category {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats {
  padding-block: clamp(var(--space-8), 6vw, var(--space-16));
  background: var(--color-surface-offset);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  text-align: center;
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

.footer__text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer a:hover {
  color: var(--color-primary);
}

.footer__disclaimer {
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.footer__links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
}

/* ============================================
   SCROLL ANIMATION
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   MOBILE
   ============================================ */
@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .header__nav-link {
    display: none;
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .filter-bar__inner {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-2);
  }

  .filter-btn {
    flex-shrink: 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: var(--space-4);
  }
}

/* ============================================
   SEARCH BAR
   ============================================ */
.search-wrap {
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 2;
}

.search-box {
  position: relative;
  max-width: 580px;
  margin-inline: auto;
}

.search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-12) var(--space-4) var(--space-10);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  color: var(--color-text);
  font-family: var(--font-body);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
  -webkit-appearance: none;
  appearance: none;
}

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

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px oklch(from var(--color-primary) l c h / 0.12);
}

/* Hide browser's native clear button */
.search-input::-webkit-search-cancel-button { display: none; }

.search-clear {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-surface-dynamic);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
}

.search-clear:hover {
  background: var(--color-border);
  color: var(--color-text);
}

/* ============================================
   CARD AS LINK
   ============================================ */
a.card {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

a.card .card__body {
  flex: 1;
}

.card__cta {
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.01em;
  transition: gap var(--transition-interactive);
}

a.card:hover .card__cta {
  color: var(--color-primary-hover);
}

/* ============================================
   NO RESULTS
   ============================================ */
.no-results {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}