/* ========================================
   Perplexity Fund — Design Tokens & Styles
   ======================================== */

:root {
  /* Typography */
  --font-body: 'General Sans', 'Helvetica Neue', Arial, sans-serif;
  --text-xs: clamp(0.7rem, 0.66rem + 0.2vw, 0.775rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.2vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);

  /* 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;

  /* Colors */
  --color-bg: #f9f9f9;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-muted: #6b6b6b;
  --color-text-faint: #aaaaaa;
  --color-link: #20808D;
  --color-link-hover: #186a74;
  --color-border: #ebebeb;
  --color-border-light: #f0f0f0;
  --color-banner-bg: #20808D;
  --color-row-hover: rgba(32, 128, 141, 0.03);

  /* Content widths */
  --content-max: 1040px;
}

/* ========================================
   Banner
   ======================================== */

.announcement-banner {
  display: block;
  background-color: var(--color-banner-bg);
  color: #ffffff;
  text-align: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.5;
  text-decoration: none;
  cursor: pointer;
}

.announcement-banner:hover {
  background-color: #1b6f7a;
}

.announcement-banner strong {
  font-weight: 700;
}

/* ========================================
   Layout
   ======================================== */

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ========================================
   Hero / Logo
   ======================================== */

.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) 0 clamp(var(--space-12), 6vw, var(--space-20));
}

.hero-logo {
  max-width: 560px;
  width: 100%;
  height: auto;
}

/* ========================================
   Portfolio Section
   ======================================== */

.portfolio-section {
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-24));
}

.portfolio-heading {
  font-size: var(--text-base);
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--space-10);
  color: var(--color-text-secondary);
  letter-spacing: -0.01em;
}

/* ========================================
   Desktop Table
   ======================================== */

.table-wrapper {
  background: var(--color-surface);
  border-radius: 10px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.portfolio-table {
  width: 100%;
  border-collapse: collapse;
}

/* Show column headers */
.portfolio-table thead tr {
  border-bottom: 1px solid var(--color-border);
}

.portfolio-table th {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-xs);
  font-weight: 500;
  text-align: left;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.portfolio-table tbody tr {
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color 180ms ease;
}

.portfolio-table tbody tr:last-child {
  border-bottom: none;
}

.portfolio-table tbody tr:hover {
  background-color: var(--color-row-hover);
}

.portfolio-table td {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  vertical-align: middle;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Column: Company Name */
.portfolio-table td:nth-child(1) {
  font-weight: 500;
  white-space: nowrap;
  color: var(--color-text);
  width: 15%;
  min-width: 130px;
}

.portfolio-table td:nth-child(1) a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms ease, color 180ms ease;
}

.portfolio-table td:nth-child(1) a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

/* Column: Category */
.portfolio-table td:nth-child(2) {
  white-space: nowrap;
  width: 20%;
}

/* Column: Country */
.portfolio-table td:nth-child(3) {
  white-space: nowrap;
  width: 8%;
  min-width: 65px;
}

/* Column: Description */
.portfolio-table td:nth-child(4) {
  color: var(--color-text-secondary);
}

/* Stealth rows */
.portfolio-table tr.stealth td:nth-child(1) {
  color: var(--color-text-faint);
  font-weight: 400;
  font-style: italic;
}

.portfolio-table tr.stealth td {
  color: var(--color-text-faint);
}

/* Portfolio note (below table) */
.portfolio-note {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin: var(--space-6) auto 0;
  font-style: italic;
  max-width: none;
}

/* ========================================
   Mobile Cards (hidden on desktop)
   ======================================== */

.portfolio-cards {
  display: none;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-12);
}

.footer-content {
  display: flex;
  gap: var(--space-10);
  align-items: flex-start;
}

.footer-disclaimer {
  flex: 1;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: none;
}

.footer-disclaimer strong {
  font-weight: 600;
  color: var(--color-text);
}

.footer-contact {
  flex-shrink: 0;
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-email {
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
}

.footer-email:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-socials {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  align-items: center;
}

.footer-socials a {
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
}

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

.footer-socials svg {
  width: 18px;
  height: 18px;
}

/* Copyright */
.footer-copyright {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-8);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
}

/* ========================================
   Responsive — Tablet
   ======================================== */

@media (max-width: 860px) {
  .main-content {
    padding: 0 var(--space-4);
  }

  .site-footer {
    padding: var(--space-6) var(--space-4) var(--space-10);
  }

  .portfolio-table th,
  .portfolio-table td {
    padding: var(--space-3) var(--space-3);
  }

  /* Hide description column on narrow tablets */
  .portfolio-table th:nth-child(4),
  .portfolio-table td:nth-child(4) {
    display: none;
  }
}

/* ========================================
   Responsive — Mobile
   ======================================== */

@media (max-width: 640px) {
  .hero {
    padding: var(--space-10) 0 var(--space-8);
  }

  .hero-logo {
    max-width: 280px;
  }

  .portfolio-heading {
    margin-bottom: var(--space-6);
  }

  /* Hide the desktop table */
  .table-wrapper {
    display: none;
  }

  /* Show mobile cards */
  .portfolio-cards {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
  }

  .portfolio-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--space-4) var(--space-5);
    text-decoration: none;
    color: inherit;
    transition: border-color 180ms ease, box-shadow 180ms ease;
  }

  .portfolio-card:hover {
    border-color: var(--color-link);
    box-shadow: 0 1px 4px rgba(32, 128, 141, 0.08);
  }

  .stealth-card {
    opacity: 0.55;
  }

  .stealth-card:hover {
    border-color: var(--color-border);
    box-shadow: none;
  }

  .card-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: var(--space-1);
  }

  .card-name {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-link);
    line-height: 1.3;
  }

  .stealth-name {
    color: var(--color-text-faint);
    font-weight: 400;
    font-style: italic;
  }

  .card-country {
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    flex-shrink: 0;
    letter-spacing: 0.03em;
  }

  .card-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: var(--space-1) 0 var(--space-2);
  }

  .card-category {
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    letter-spacing: 0.01em;
  }

  /* Footer stacks */
  .footer-content {
    flex-direction: column;
    gap: var(--space-6);
  }

  .footer-contact {
    text-align: left;
  }

  .footer-socials {
    justify-content: flex-start;
  }
}

@media (max-width: 400px) {
  .main-content {
    padding: 0 var(--space-3);
  }

  .site-footer {
    padding: var(--space-5) var(--space-3) var(--space-8);
  }

  .hero-logo {
    max-width: 240px;
  }

  .portfolio-card {
    padding: var(--space-3) var(--space-4);
  }
}