/* ============================================================
   ZEVIVO — Unified CTA Design System
   Version: 2.0 (v39)  |  Source of Truth for all button styles
   All colors/radius/shadow sourced from design-tokens.css
   
   USAGE:
     Primary:    <a class="btn btn-primary">Open Account</a>
     Secondary:  <a class="btn btn-secondary">Try Demo</a>
     Ghost:      <a class="btn btn-ghost">Learn More</a>
     Text:       <a class="btn btn-text">View Details</a>
     Tab:        <button class="btn btn-tab [active]">Tab Label</button>
   
   SIZE MODIFIERS:
     btn-sm   — small  (navbar, header-top)
     btn-md   — medium (default, hero, cards)
     btn-lg   — large  (hero featured, landing CTA)
   
   STATE CLASSES (applied via JS):
     .is-loading  — shows spinner, disables click
     .is-disabled — muted appearance, disables click
   ============================================================ */

/* ============================================================
   1. BASE BUTTON RESET
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-secondary);
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  text-decoration: none !important;
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  outline: none;
  background: none;
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Unified transition */
  transition:
    background-color 0.25s ease,
    border-color     0.25s ease,
    color            0.25s ease,
    transform        0.2s ease,
    box-shadow       0.25s ease,
    opacity          0.2s ease;
  transform: translateY(0);
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline: 3px solid rgba(255, 69, 33, 0.5);
  outline-offset: 3px;
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

/* ============================================================
   2. SIZE VARIANTS
   ============================================================ */

/* Small — navbar, header-top, inline */
.btn.btn-sm {
  height: 32px;
  min-height: 32px;
  padding: 0 16px;
  font-size: 11px;
  letter-spacing: 1.4px;
  border-radius: var(--radius-lg);
}

/* Medium — default hero, cards, sections */
.btn.btn-md,
.btn:not(.btn-sm):not(.btn-lg) {
  height: 48px;
  min-height: 48px;
  padding: 0 28px;
  font-size: 13px;
  letter-spacing: 1.5px;
  border-radius: var(--radius-pill);
}

/* Large — featured hero CTA, landing pages */
.btn.btn-lg {
  height: 56px;
  min-height: 56px;
  padding: 0 36px;
  font-size: 15px;
  letter-spacing: 1.6px;
  border-radius: var(--radius-pill);
}

/* ============================================================
   3. COLOUR VARIANTS
   ============================================================ */

/* --- Primary: Brand Orange — main conversion action --- */
.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: var(--shadow-hover);
}
.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 6px 20px rgba(255, 69, 33, 0.40);
  transform: translateY(-2px);
}
.btn-primary:active {
  background-color: var(--color-primary-active, #c73317);
  border-color: var(--color-primary-active, #c73317);
  box-shadow: 0 2px 8px rgba(255, 69, 33, 0.30);
  transform: translateY(0) scale(0.98);
}

/* --- Secondary: Dark — supporting action on dark bg --- */
.btn-secondary {
  background-color: var(--color-dark-surface);
  border-color: var(--color-dark-surface);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 4px 14px rgba(44, 57, 62, 0.25);
}
.btn-secondary:hover {
  background-color: var(--color-dark-hover, #3a4b51);
  border-color: var(--color-dark-hover, #3a4b51);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 6px 20px rgba(44, 57, 62, 0.35);
  transform: translateY(-2px);
}
.btn-secondary:active {
  background-color: var(--color-dark-deep);
  border-color: var(--color-dark-deep);
  box-shadow: 0 2px 8px rgba(44, 57, 62, 0.25);
  transform: translateY(0) scale(0.98);
}

/* --- Ghost: Transparent + white border — on dark hero backgrounds --- */
.btn-ghost {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--color-text-inverse) !important;
  box-shadow: none;
}
.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary) !important;
  box-shadow: 0 0 0 1px rgba(255, 69, 33, 0.3);
  transform: translateY(-2px);
}
.btn-ghost:active {
  background-color: rgba(255, 69, 33, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary) !important;
  transform: translateY(0) scale(0.98);
}

/* Ghost variant on light backgrounds */
.btn-ghost-dark {
  background-color: transparent;
  border-color: rgba(44, 57, 62, 0.35);
  color: var(--color-dark-surface) !important;
}
.btn-ghost-dark:hover {
  background-color: rgba(44, 57, 62, 0.06);
  border-color: var(--color-primary);
  color: var(--color-primary) !important;
  transform: translateY(-2px);
}
.btn-ghost-dark:active {
  transform: translateY(0) scale(0.98);
}

/* --- Text Button: low-emphasis link action --- */
.btn-text {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-primary) !important;
  padding-left: 4px;
  padding-right: 4px;
  box-shadow: none;
  letter-spacing: 0.8px;
}
.btn-text:hover {
  color: var(--color-primary-hover) !important;
  text-decoration: underline !important;
  transform: none;
}
.btn-text:active {
  color: var(--color-primary-active, #c73317) !important;
  transform: none;
}

/* --- Navbar Open Account button --- */
.btn-nav-cta {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  height: 36px;
  min-height: 36px;
  padding: 0 20px;
  font-size: 12px;
  letter-spacing: 1.3px;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.25);
}
.btn-nav-cta:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 4px 14px rgba(255, 69, 33, 0.35);
  transform: translateY(-1px);
}

/* ============================================================
   4. TAB BUTTON — unified across all pages
   ============================================================ */
.btn-tab {
  background: transparent;
  border: 1px solid rgba(44, 57, 62, 0.18);
  color: var(--color-text-secondary);
  height: 40px;
  min-height: 40px;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: none;
  border-radius: var(--radius-pill);
  box-shadow: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn-tab:hover {
  background-color: rgba(255, 69, 33, 0.06);
  border-color: rgba(255, 69, 33, 0.3);
  color: var(--color-primary);
  transform: none;
}
.btn-tab.active,
.btn-tab[aria-selected="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.25);
}

/* ============================================================
   5. STATE MODIFIERS
   ============================================================ */

/* Disabled */
.btn.is-disabled,
.btn:disabled,
.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
  transform: none !important;
}

/* Loading */
.btn.is-loading {
  cursor: wait;
  pointer-events: none;
  opacity: 0.75;
}
.btn.is-loading::after {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: btn-spin 0.7s linear infinite;
  margin-left: 8px;
}
@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* Full-width utility */
.btn-full {
  width: 100%;
}

/* ============================================================
   6. BUTTON GROUP
   ============================================================ */
.btn-group {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ============================================================
   7. LEGACY CLASS ALIASES
   Maps old class names to the new system so existing HTML
   continues to work without a full HTML rewrite.
   These aliases are additive — they do NOT remove old classes.
   ============================================================ */

/* green-bg → btn-primary */
.btn.green-bg,
.btn.orange-bg {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
  box-shadow: 0 4px 14px rgba(255, 69, 33, 0.28);
  height: 48px;
  min-height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  transition:
    background-color 0.25s ease,
    border-color     0.25s ease,
    transform        0.2s ease,
    box-shadow       0.25s ease;
}
.btn.green-bg:hover,
.btn.orange-bg:hover {
  background-color: var(--color-primary-hover) !important;
  border-color: var(--color-primary-hover) !important;
  color: var(--color-text-inverse) !important;
  box-shadow: 0 6px 20px rgba(255, 69, 33, 0.38) !important;
  transform: translateY(-2px) !important;
}
.btn.green-bg:active,
.btn.orange-bg:active {
  background-color: var(--color-primary-active, #c73317) !important;
  border-color: var(--color-primary-active, #c73317) !important;
  transform: translateY(0) scale(0.98) !important;
}

/* dark-bg → btn-secondary */
.btn.dark-bg {
  background-color: var(--color-dark-surface) !important;
  border-color: var(--color-dark-surface) !important;
  color: var(--color-text-inverse) !important;
  box-shadow: 0 4px 14px rgba(44, 57, 62, 0.22);
  height: 48px;
  min-height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  transition:
    background-color 0.25s ease,
    border-color     0.25s ease,
    transform        0.2s ease,
    box-shadow       0.25s ease;
}
.btn.dark-bg:hover {
  background-color: var(--color-dark-hover, #3a4b51) !important;
  border-color: var(--color-dark-hover, #3a4b51) !important;
  color: var(--color-text-inverse) !important;
  box-shadow: 0 6px 20px rgba(44, 57, 62, 0.32) !important;
  transform: translateY(-2px) !important;
}
.btn.dark-bg:active {
  background-color: var(--color-dark-deep) !important;
  border-color: var(--color-dark-deep) !important;
  transform: translateY(0) scale(0.98) !important;
}

/* dark-outline-btn → btn-ghost (on dark backgrounds) */
.dark-outline-btn {
  background-color: transparent !important;
  border: 2px solid rgba(255, 255, 255, 0.40) !important;
  color: var(--color-text-inverse) !important;
  height: 48px;
  min-height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  transition:
    border-color  0.25s ease,
    color         0.25s ease,
    background    0.25s ease,
    transform     0.2s ease,
    box-shadow    0.25s ease;
}
.dark-outline-btn:hover {
  background-color: rgba(255, 69, 33, 0.08) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
  box-shadow: 0 0 0 1px rgba(255, 69, 33, 0.25);
  transform: translateY(-2px);
}
.dark-outline-btn:active {
  background-color: rgba(255, 69, 33, 0.12) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
  transform: translateY(0) scale(0.98);
}

/* open-account-btn (navbar) */
.open-account-btn {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
  height: 36px !important;
  min-height: 36px !important;
  padding: 0 20px !important;
  font-size: 12px !important;
  font-weight: 600 !important;
  letter-spacing: 1.3px !important;
  border-radius: var(--radius-pill) !important;
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.22);
  transition:
    background-color 0.25s ease,
    border-color     0.25s ease,
    transform        0.2s ease,
    box-shadow       0.25s ease;
}
.open-account-btn:hover {
  background-color: var(--color-primary-hover) !important;
  border-color: var(--color-primary-hover) !important;
  color: var(--color-text-inverse) !important;
  box-shadow: 0 4px 14px rgba(255, 69, 33, 0.32) !important;
  transform: translateY(-1px) !important;
}

/* button-small (header-top CLIENT LOGIN) */
.button-small {
  height: 32px !important;
  min-height: 32px !important;
  border-radius: var(--radius-lg) !important;
  font-size: 11px !important;
  font-weight: 600 !important;
  letter-spacing: 1.4px !important;
  padding: 0 16px !important;
  border: 1.5px solid rgba(44, 57, 62, 0.28) !important;
  background: transparent !important;
  color: var(--color-mid) !important;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease !important;
}
.button-small:hover {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
}

/* start_btn / free_btn (spreads page) */
.start_btn,
.free_btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  min-height: 48px;
  border-radius: var(--radius-pill);
  font-family: var(--font-secondary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.3px;
  text-transform: uppercase;
  text-decoration: none !important;
  transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
  cursor: pointer;
}
.start_btn {
  background-color: var(--color-primary);
  border: 2px solid var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 4px 14px rgba(255, 69, 33, 0.28);
}
.start_btn:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 6px 20px rgba(255, 69, 33, 0.38);
  transform: translateY(-2px);
  color: var(--color-text-inverse) !important;
}
.free_btn {
  background-color: transparent;
  border: 2px solid rgba(255, 255, 255, 0.40);
  color: var(--color-text-inverse) !important;
}
.free_btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary) !important;
  background-color: rgba(255, 69, 33, 0.08);
  transform: translateY(-2px);
}

/* wt-access-btn (webtrader access cards) */
.wt-access-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  min-height: 40px;
  padding: 0 24px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  border: 2px solid var(--color-primary);
  color: var(--color-text-inverse) !important;
  font-family: var(--font-secondary);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  text-decoration: none !important;
  box-shadow: 0 3px 10px rgba(255, 69, 33, 0.25);
  transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}
.wt-access-btn:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 5px 16px rgba(255, 69, 33, 0.35);
  transform: translateY(-2px);
  color: var(--color-text-inverse) !important;
}

/* tab-btn (markets page) */
.tab-btn {
  background: transparent;
  border: 1.5px solid rgba(44, 57, 62, 0.18);
  color: var(--color-text-secondary);
  height: 40px;
  min-height: 40px;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font-secondary);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.tab-btn:hover {
  background-color: rgba(255, 69, 33, 0.06);
  border-color: rgba(255, 69, 33, 0.3);
  color: var(--color-primary);
}
.tab-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.25);
}

/* platform-tab-btn */
.platform-tab-btn {
  background: transparent;
  border: 1.5px solid rgba(44, 57, 62, 0.18);
  color: var(--color-text-secondary);
  height: 40px;
  min-height: 40px;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font-secondary);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.platform-tab-btn:hover {
  background-color: rgba(255, 69, 33, 0.06);
  border-color: rgba(255, 69, 33, 0.3);
  color: var(--color-primary);
}
.platform-tab-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.25);
}

/* spreads-tab-btn */
.spreads-tab-btn {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
  height: 40px;
  min-height: 40px;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font-secondary);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.spreads-tab-btn:hover {
  border-color: rgba(255, 69, 33, 0.5);
  color: rgba(255, 255, 255, 0.9);
}
.spreads-tab-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.3);
}

/* swap-tab-btn */
.swap-tab-btn {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
  height: 40px;
  min-height: 40px;
  padding: 0 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-family: var(--font-secondary);
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.swap-tab-btn:hover {
  border-color: rgba(255, 69, 33, 0.5);
  color: rgba(255, 255, 255, 0.9);
}
.swap-tab-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  box-shadow: 0 2px 10px rgba(255, 69, 33, 0.3);
}

/* vps-submit-btn */
.vps-submit-btn {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
  width: 100%;
  height: 52px;
  min-height: 52px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.5px;
  box-shadow: var(--shadow-hover);
  transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}
.vps-submit-btn:hover {
  background-color: var(--color-primary-hover) !important;
  border-color: var(--color-primary-hover) !important;
  box-shadow: 0 6px 22px rgba(255, 69, 33, 0.40) !important;
  transform: translateY(-2px);
}

/* ============================================================
   8. MOBILE OVERRIDES  @media (max-width: 768px)
   ============================================================ */
@media (max-width: 768px) {

  /* Ensure all buttons meet 44px minimum tap target */
  .btn,
  .btn.btn-sm,
  .btn.btn-md,
  .btn:not(.btn-sm):not(.btn-lg),
  .button-middle,
  .dark-outline-btn,
  .open-account-btn,
  .wt-access-btn {
    min-height: 44px !important;
    height: auto !important;
    padding-top: 12px !important;
    padding-bottom: 12px !important;
  }

  /* button-small stays compact in header-top */
  .btn.btn-sm,
  .button-small {
    min-height: 32px !important;
    height: 32px !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
  }

  /* Hero CTA groups: stack vertically, full width */
  .hero-btns,
  .market-hero-cta,
  .vps-hero-cta,
  .platform-hero-cta,
  .cta-btns,
  .vps-cta-btns,
  .why-cta {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: var(--space-sm) !important;
    width: 100% !important;
  }

  .hero-btns .btn,
  .hero-btns .dark-outline-btn,
  .market-hero-cta .btn,
  .market-hero-cta .dark-outline-btn,
  .vps-hero-cta .btn,
  .vps-hero-cta .dark-outline-btn,
  .platform-hero-cta .btn,
  .platform-hero-cta .dark-outline-btn,
  .cta-btns .btn,
  .cta-btns .dark-outline-btn,
  .vps-cta-btns .btn,
  .vps-cta-btns .dark-outline-btn,
  .why-cta .btn {
    width: 100% !important;
    margin: 0 !important;
    text-align: center !important;
    justify-content: center !important;
  }

  /* Remove mr-3 spacing that causes layout issues on mobile */
  .btn.mr-3 {
    margin-right: 0 !important;
  }

  /* Tab buttons: allow wrapping, smaller padding */
  .tab-btn,
  .platform-tab-btn,
  .spreads-tab-btn,
  .swap-tab-btn {
    height: 36px !important;
    min-height: 36px !important;
    padding: 0 14px !important;
    font-size: 12px !important;
  }

  /* Account card buttons */
  .account-detail-card .btn {
    width: 100% !important;
  }

  /* VPS submit button */
  .vps-submit-btn {
    height: 52px !important;
    min-height: 52px !important;
    font-size: 14px !important;
  }

  /* Drawer CTA buttons */
  .mobile-drawer-cta {
    display: flex !important;
    flex-direction: column !important;
    gap: var(--space-xs) !important;
    padding: 16px 20px !important;
  }

  .mobile-drawer-cta .btn-primary,
  .mobile-drawer-cta .btn-ghost {
    width: 100% !important;
    height: 48px !important;
    min-height: 48px !important;
    font-size: 13px !important;
  }
}