/* ==========================================================================
   AI-SEC Community — Components
   Requires tokens.css. All values below come from design tokens —
   no hardcoded colors, fonts, or spacing.
   ========================================================================== */

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-navbar);
  background-color: var(--color-bg);
  background-color: color-mix(in srgb, var(--color-bg) 72%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  animation: navbar-drop 0.6s var(--ease-standard) both;
}

.navbar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-deep-purple), var(--brand-primary));
  background-size: 200% auto;
  opacity: 0.9;
  animation: navbar-accent-pan 8s linear infinite;
}

@keyframes navbar-accent-pan {
  to { background-position: 200% center; }
}

@keyframes navbar-drop {
  from { transform: translateY(-100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.navbar--scrolled {
  background-color: color-mix(in srgb, var(--color-bg) 90%, transparent);
  box-shadow: var(--shadow-subtle);
}

.navbar--scrolled .navbar__inner {
  padding-block: calc(var(--space-md) * 0.6);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: var(--space-md);
  transition: padding-block var(--transition-base);
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

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

.navbar__logo img {
  height: 46px;
  width: auto;
  transition: transform var(--transition-base);
}

.navbar__logo:hover img {
  transform: rotate(-8deg) scale(1.08);
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: 1rem;
  font-weight: var(--fw-medium);
  letter-spacing: 0.01em;
}

.navbar__links a {
  position: relative;
  color: var(--color-text-secondary);
  padding-block: 0.35rem;
  transition: color var(--transition-fast);
}

.navbar__links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--brand-deep-purple));
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.navbar__links a:hover,
.navbar__links a.is-active {
  color: var(--color-text);
}

.navbar__links a:hover::after,
.navbar__links a.is-active::after {
  width: 100%;
}

/* Desktop-only entrance stagger — kept out of the mobile breakpoint so it
   never fights with .navbar__links' own open/close opacity transition. */
@media (min-width: 769px) {
  .navbar__links a {
    animation: navlink-in 0.5s var(--ease-standard) both;
  }
  .navbar__links a:nth-child(1) { animation-delay: 0.08s; }
  .navbar__links a:nth-child(2) { animation-delay: 0.14s; }
  .navbar__links a:nth-child(3) { animation-delay: 0.2s; }
  .navbar__links a:nth-child(4) { animation-delay: 0.26s; }
  .navbar__links a:nth-child(5) { animation-delay: 0.32s; }
  .navbar__links a:nth-child(6) { animation-delay: 0.38s; }
}

@keyframes navlink-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  transform: rotate(15deg);
}

.theme-toggle span {
  display: inline-block;
  transition: transform var(--transition-slow);
}

[data-theme="light"] .theme-toggle span {
  transform: rotate(180deg);
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
  transition: transform var(--transition-fast);
}

.navbar__toggle:hover {
  transform: scale(1.08);
}

.navbar__toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.navbar__toggle:hover span {
  background-color: var(--color-primary);
}

.navbar__toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar__toggle.is-open span:nth-child(2) {
  opacity: 0;
}
.navbar__toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Injected into the mobile dropdown by navigation.js; desktop CTA lives
   in .navbar__actions and is hidden below the mobile breakpoint instead. */
.navbar__cta--mobile {
  display: none;
}

/* Mobile nav (hamburger breakpoint mirrors --breakpoint-md, 768px) */
@media (max-width: 768px) {
  .navbar__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .navbar__links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .navbar__links a,
  .navbar__links .navbar__cta--mobile {
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base);
  }

  .navbar__links.is-open a,
  .navbar__links.is-open .navbar__cta--mobile {
    opacity: 1;
    transform: translateX(0);
  }

  .navbar__links.is-open a:nth-child(1) { transition-delay: 0.03s; }
  .navbar__links.is-open a:nth-child(2) { transition-delay: 0.07s; }
  .navbar__links.is-open a:nth-child(3) { transition-delay: 0.11s; }
  .navbar__links.is-open a:nth-child(4) { transition-delay: 0.15s; }
  .navbar__links.is-open a:nth-child(5) { transition-delay: 0.19s; }
  .navbar__links.is-open a:nth-child(6) { transition-delay: 0.23s; }
  .navbar__links.is-open .navbar__cta--mobile { transition-delay: 0.27s; }

  .navbar__cta {
    display: none;
  }

  .navbar__cta--mobile {
    display: inline-flex;
    margin-top: var(--space-sm);
  }

  .navbar__toggle {
    display: flex;
  }
}

.navbar__cta {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.navbar__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--color-primary) 45%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  .navbar {
    animation: none;
  }
  .navbar::before {
    animation: none;
  }
  .navbar__logo:hover img,
  .theme-toggle:hover,
  .navbar__toggle:hover,
  .navbar__cta:hover {
    transform: none;
  }
  .theme-toggle span {
    transition: none;
  }
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-2xl) var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  color: var(--color-text);
}

.footer__tagline {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--fs-caption);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

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

.footer__links a {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.footer__social {
  display: flex;
  gap: var(--space-sm);
}

.footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

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

.footer__social svg {
  width: 18px;
  height: 18px;
}

/* Icon + text links (LinkedIn on speaker/team cards) */
.icon-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.icon-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-caption);
  color: var(--color-text-secondary);
}

.footer__bottom a {
  color: var(--color-text-secondary);
  text-decoration: underline;
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: var(--fw-medium);
  font-size: var(--fs-small);
  white-space: nowrap;
  border: 2px solid transparent;
  transition: background-color var(--transition-base), border-color var(--transition-base),
    color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-card);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.btn-tertiary {
  align-self: flex-start;
  justify-content: flex-start;
  padding-inline: 0;
  border: none;
  background: none;
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.btn-tertiary:hover {
  color: var(--color-primary-hover);
  transform: none;
}

.btn-whatsapp {
  background-color: transparent;
  border-color: var(--color-whatsapp);
  color: var(--color-whatsapp);
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp);
  color: var(--color-on-primary);
}

/* --- Filter buttons (events.html type/format filters) --- */
.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-weight: var(--fw-medium);
  font-size: var(--fs-small);
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast);
}

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

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

/* --- Cards --- */
.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid color-mix(in srgb, var(--color-border) 55%, var(--brand-primary) 20%);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base), opacity var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
  border-color: color-mix(in srgb, var(--color-border) 30%, var(--brand-primary) 45%);
}

/* Filtered out by event-filters.js — fades before display:none is applied */
.card.is-filtered-out {
  opacity: 0;
  transform: scale(0.96);
  pointer-events: none;
}

.events-empty-message {
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--space-xl) 0;
}

.card__image {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h5);
  font-weight: var(--fw-bold);
  color: var(--color-text);
}

.card__text {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

/* Speaker card variant: centered, circular avatar */
.speaker-card {
  align-items: center;
  text-align: center;
}

.speaker-card__avatar {
  width: 6rem;
  height: 6rem;
  border-radius: var(--radius-full);
  object-fit: cover;
  margin-top: var(--space-lg);
}

/* .card__body is `display:flex; flex-direction:column` with the default
   align-items:stretch, so a <span class="badge"> inside it stretches to
   the card's full width instead of shrink-wrapping to its text — the
   badge pill then renders left-aligned and oversized instead of centered.
   Scope align-items:center to speaker cards so badges (and everything
   else) size to content and center under the name/avatar. */
.speaker-card .card__body {
  align-items: center;
}

/* --- Team / event group sections (About leadership rows, Past Events
   session/panel rows) — these were unstyled bare <div>s before, which is
   why every row on About and Past Events sat flush against the next one
   with no rhythm, and centered rows ("Founder", "Core Technical Member")
   weren't actually centered. --- */
.team-group,
.event-group {
  margin-bottom: var(--space-2xl);
}

.team-group:last-child,
.event-group:last-child {
  margin-bottom: 0;
}

.team-group__header,
.event-group__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.team-group__title,
.event-group__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h5);
  font-weight: var(--fw-bold);
  color: var(--color-text);
}

.team-group--center .team-group__header {
  justify-content: center;
  border-bottom: none;
  text-align: center;
}

/* Month block (Past Events) */
.month-block__header {
  margin-bottom: var(--space-xl);
}

.month-block__meta {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Archive quick-nav pills (Past Events hero) */
.archive-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.archive-nav a {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast),
    background-color var(--transition-fast), transform var(--transition-fast);
}

.archive-nav a:hover {
  color: var(--color-on-primary);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* --- Image fallback ---
   Swapped in by js/main.js when a photo fails to load. Inherits the
   failed <img>'s classes (speaker-card__avatar, card__image, etc.) so it
   always renders at exactly the size/shape the layout expected — a
   missing photo now degrades to a neat initials badge instead of a
   broken-image icon that was throwing card grids out of alignment. */
.img-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-deep-purple));
  color: #fff;
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  letter-spacing: 0.02em;
  user-select: none;
}

.speaker-card__avatar.img-fallback {
  font-size: 1.35rem;
}

.card__image.img-fallback {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Stats bar --- */
.stats-bar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-lg);
  background: linear-gradient(160deg, var(--color-surface), var(--color-section-tint));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevated);
  overflow: hidden;
}

.stats-bar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-deep-purple), var(--brand-primary));
}

.stat-item {
  position: relative;
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-xs);
  min-width: 8rem;
  text-align: center;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 0.25rem;
  bottom: 0.25rem;
  right: calc(var(--space-lg) / -2);
  width: 1px;
  background-color: var(--color-border);
}

.stat-item__number {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  font-weight: var(--fw-extrabold);
  line-height: 1.1;
  color: var(--color-primary);
}

.stat-item__label {
    display: block;
    color: var(--color-text-secondary);
    font-size: 16px;
    text-align: center;
}

/* --- Badge / tag --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: var(--color-section-tint);
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
}

.badge--accent {
  border-color: var(--color-primary);
  background-color: transparent;
  color: var(--color-primary);
}

.badge--outline {
  background-color: transparent;
}

/* Muted variant — used for Volunteer badges on About so the role tag
   reads as lower-emphasis than Core Member / Advisory Board accents. */
.badge--muted {
  opacity: 0.75;
}

/* --- Section container --- */
.section {
  padding-block: var(--space-2xl);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--tint {
  background-color: var(--color-section-tint);
}

.section__header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  font-weight: var(--fw-extrabold);
  color: var(--color-text);
}

.section__subtitle {
  font-size: var(--fs-body);
  color: var(--color-text-secondary);
  max-width: 40ch;
}

/* --- Forms --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.form-label {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text);
}

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

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-secondary);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.form-textarea {
  resize: vertical;
  min-height: 8rem;
}

.form-submit {
  align-self: flex-start;
}

/* --- Form validation states (forms.js) --- */
.form-input.is-invalid,
.form-textarea.is-invalid,
.form-select.is-invalid {
  border-color: var(--color-error);
}

.form-input.is-invalid:focus,
.form-textarea.is-invalid:focus,
.form-select.is-invalid:focus {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-error) 25%, transparent);
}

.form-error {
  display: block;
  font-size: var(--fs-caption);
  color: var(--color-error);
}

.form-success {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  background-color: var(--color-section-tint);
  color: var(--color-text);
  font-weight: var(--fw-medium);
  text-align: center;
}