/* =========================================================================
   DigiFlux — Components: Buttons, Cards, Badges, Chips, Icons
   ========================================================================= */

/* ============================== BUTTONS ============================== */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  transition:
    background-color var(--t-fast),
    color var(--t-fast),
    border-color var(--t-fast),
    transform var(--t-fast),
    box-shadow var(--t-med);
  min-height: 44px;
}

.btn:hover  { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn svg {
  transition: transform var(--t-fast);
}
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background-color: var(--df-orange);
  color: var(--df-white);
  box-shadow: 0 4px 14px rgba(244, 123, 32, 0.35);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--df-amber);
  color: var(--df-white);
  box-shadow: 0 8px 24px rgba(244, 123, 32, 0.45);
}

.btn-secondary {
  background-color: var(--df-blue-deep);
  color: var(--df-white);
  box-shadow: 0 4px 14px rgba(27, 77, 168, 0.30);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--df-blue-bright);
  color: var(--df-white);
  box-shadow: 0 8px 24px rgba(46, 134, 255, 0.42);
}

.btn-outline {
  background-color: transparent;
  color: var(--df-navy);
  border-color: var(--df-gray-200);
}
.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--df-blue-deep);
  color: var(--df-blue-deep);
  background-color: var(--df-gray-100);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--df-white);
  border-color: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-outline-light:hover,
.btn-outline-light:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--df-white);
  border-color: var(--df-white);
}

.btn-on-blue {
  background-color: var(--df-white);
  color: var(--df-blue-deep);
}
.btn-on-blue:hover,
.btn-on-blue:focus-visible {
  background-color: var(--df-gray-100);
  color: var(--df-blue-deep);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.btn-on-orange {
  background-color: var(--df-white);
  color: var(--df-orange);
}
.btn-on-orange:hover,
.btn-on-orange:focus-visible {
  background-color: var(--df-gray-100);
  color: var(--df-orange);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
}

.btn-sm {
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  min-height: 36px;
}

.btn-full { width: 100%; }

/* ---- Shimmer sweep (only on .btn-shine) ---- */
.btn-shine::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.30) 50%,
    transparent 100%
  );
  width: 50%;
  transform: translateX(-120%) skewX(-20deg);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t-fast);
}
.btn-shine:hover::after {
  opacity: 1;
  animation: shimmer-sweep 900ms ease-out;
}

/* ============================== CARD (base) ============================== */
.card {
  position: relative;
  background-color: var(--df-white);
  border: 1px solid var(--df-gray-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  transition:
    transform var(--t-med),
    box-shadow var(--t-med),
    border-color var(--t-med);
  overflow: hidden;
}

/* gradient accent strip on top (initially hidden) */
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--df-blue-bright), var(--df-orange));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 500ms var(--ease-out);
}

.card-hover:hover,
.card-hover:focus-within {
  transform: translateY(-6px);
  border-color: rgba(46, 134, 255, 0.4);
  box-shadow: var(--shadow-lg);
}

.card-hover:hover::before,
.card-hover:focus-within::before {
  transform: scaleX(1);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--df-navy);
  margin: 1rem 0 0.5rem;
  letter-spacing: -0.01em;
}

.card-text {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--df-gray-500);
  line-height: 1.6;
}

/* ============================== FEATURE ICON ============================== */
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  position: relative;
  transition: transform var(--t-med);
}

.feature-icon::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: inherit;
  filter: blur(14px);
  opacity: 0.35;
  z-index: -1;
  transition: opacity var(--t-med);
}

.card-hover:hover .feature-icon       { transform: scale(1.06) rotate(-3deg); }
.card-hover:hover .feature-icon::after { opacity: 0.6; }

.feature-icon svg { width: 26px; height: 26px; }

.feature-icon-blue   { background: var(--df-think-tint);    color: var(--df-think); }
.feature-icon-green  { background: var(--df-dialogue-tint); color: var(--df-dialogue); }
.feature-icon-orange { background: var(--df-do-tint);       color: var(--df-do); }
.feature-icon-red    { background: var(--df-reading-tint);  color: var(--df-reading); }
.feature-icon-navy   { background: var(--df-research-tint); color: var(--df-research); }

/* ============================== EU BADGE ============================== */
.eu-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-pill);
  color: var(--df-white);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 1.5rem;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 4px 16px rgba(0, 0, 0, 0.15);
}

.eu-badge .eu-icon {
  color: var(--df-amber);
  filter: drop-shadow(0 0 6px rgba(255, 169, 77, 0.55));
}

/* ============================== CHIP / PILL ============================== */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: var(--radius-pill);
  line-height: 1.4;
}

.chip-think    { background: var(--df-think-tint);    color: var(--df-think); }
.chip-dialogue { background: var(--df-dialogue-tint); color: var(--df-dialogue); }
.chip-do       { background: var(--df-do-tint);       color: var(--df-do); }
.chip-research { background: var(--df-research-tint); color: var(--df-research); }
.chip-reading  { background: var(--df-reading-tint);  color: var(--df-reading); }

.chip-core {
  background: linear-gradient(135deg, var(--df-amber) 0%, var(--df-orange) 100%);
  color: var(--df-white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: 0 4px 12px rgba(244, 123, 32, 0.4);
}

.chip-coord {
  background: linear-gradient(135deg, var(--df-amber) 0%, var(--df-orange) 100%);
  color: var(--df-white);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 4px 10px rgba(244, 123, 32, 0.35);
}

/* ---------- Accent text ---------- */
.accent-orange { color: var(--df-amber); }
.accent-blue   { color: var(--df-blue-bright); }

/* ============================== TRUST ROW ============================== */
.trust-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.875rem;
  list-style: none;
}

.trust-row li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.trust-row li svg {
  color: var(--df-amber);
  opacity: 0.95;
}

.trust-row .dot { color: rgba(255, 255, 255, 0.32); }

/* ============================== LANG SWITCHER ============================== */
.lang-switcher {
  position: relative;
  display: inline-block;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.625rem;
  background-color: transparent;
  border: 1px solid var(--df-gray-200);
  border-radius: var(--radius-pill);
  color: var(--df-navy);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--t-fast), background-color var(--t-fast);
  min-height: 36px;
}

.lang-toggle:hover,
.lang-toggle:focus-visible,
.lang-toggle[aria-expanded="true"] {
  border-color: var(--df-blue-deep);
  background-color: var(--df-gray-100);
}

.lang-toggle .lang-flag {
  font-size: 1rem;
  line-height: 1;
}

.lang-toggle .lang-chevron {
  color: var(--df-gray-500);
  transition: transform var(--t-fast);
}
.lang-toggle[aria-expanded="true"] .lang-chevron { transform: rotate(180deg); }

/* ---- Dropdown menu ---- */
.lang-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 180px;
  margin: 0;
  padding: 0.375rem;
  list-style: none;
  background-color: var(--df-white);
  border: 1px solid var(--df-gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: calc(var(--z-header) + 2);
  opacity: 1;
  transform-origin: top right;
  animation: lang-menu-in 160ms var(--ease-out);
}

.lang-menu[hidden] { display: none; }

@keyframes lang-menu-in {
  from { opacity: 0; transform: translateY(-4px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.625rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--df-navy);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--t-fast), color var(--t-fast);
}

.lang-option:hover,
.lang-option:focus-visible {
  background-color: var(--df-gray-100);
  outline: none;
}

.lang-option.is-active,
.lang-option[aria-selected="true"] {
  background-color: rgba(46, 134, 255, 0.10);
  color: var(--df-blue-deep);
}

.lang-option .lang-flag {
  font-size: 1.125rem;
  line-height: 1;
}

/* ============================== MOBILE MENU TOGGLE ============================== */
/* Visible by default (mobile-first); hidden on desktop via responsive.css ≥1024px */
.mobile-menu-toggle {
  display: flex;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color var(--t-fast);
}

.mobile-menu-toggle:hover { background-color: var(--df-gray-100); }

.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--df-navy);
  border-radius: 2px;
  transition: transform var(--t-med), opacity var(--t-fast);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================== PLACEHOLDERS ============================== */
.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 80px;
  border: 1px dashed var(--df-gray-200);
  border-radius: var(--radius-md);
  background-color: var(--df-gray-100);
  color: var(--df-gray-500);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 0.5rem;
}

.placeholder-flag {
  padding: 0.25rem 0.5rem;
  border: 1px dashed rgba(255, 255, 255, 0.30);
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 600;
  letter-spacing: 0.04em;
}