#tk-form {
  --tk-primary:        #5b56f0;
  --tk-primary-hover:  #4a44e0;
  --tk-primary-glow:   rgba(91, 86, 240, 0.22);
  --tk-text:           #0f172a;
  --tk-text-muted:     #64748b;
  --tk-text-dim:       #94a3b8;
  --tk-border:         #e2e8f0;
  --tk-border-strong:  #cbd5e1;
  --tk-border-focus:   #5b56f0;
  --tk-error:          #e11d48;
  --tk-error-glow:     rgba(225, 29, 72, 0.18);
  --tk-success:        #059669;
  --tk-bg:             #ffffff;
  --tk-bg-input:       #f8fafc;
  --tk-bg-input-focus: #ffffff;
  --tk-radius:         12px;
  --tk-radius-sm:      8px;
  --tk-shadow:         0 1px 2px rgba(15, 23, 42, 0.04), 0 10px 30px -10px rgba(15, 23, 42, 0.12);
  --tk-ease:           cubic-bezier(0.4, 0, 0.2, 1);

  box-sizing: border-box;
  max-width: 440px;
  margin: 28px auto;
  color: var(--tk-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#tk-form *,
#tk-form *::before,
#tk-form *::after { box-sizing: border-box; }

@media (prefers-color-scheme: dark) {
  #tk-form[data-theme="auto"],
  #tk-form:not([data-theme]) {
    --tk-text:           #f1f5f9;
    --tk-text-muted:     #94a3b8;
    --tk-text-dim:       #64748b;
    --tk-border:         #334155;
    --tk-border-strong:  #475569;
    --tk-bg:             #1e293b;
    --tk-bg-input:       #0f172a;
    --tk-bg-input-focus: #1e293b;
    --tk-shadow:         0 1px 2px rgba(0, 0, 0, 0.2), 0 20px 40px -16px rgba(0, 0, 0, 0.5);
  }
}

#tk-form[data-theme="dark"] {
  --tk-text:           #f1f5f9;
  --tk-text-muted:     #94a3b8;
  --tk-text-dim:       #64748b;
  --tk-border:         #334155;
  --tk-border-strong:  #475569;
  --tk-bg:             #1e293b;
  --tk-bg-input:       #0f172a;
  --tk-bg-input-focus: #1e293b;
  --tk-shadow:         0 1px 2px rgba(0, 0, 0, 0.2), 0 20px 40px -16px rgba(0, 0, 0, 0.5);
}

#tk-form .tk-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px;
  background: var(--tk-bg);
  border-radius: var(--tk-radius);
  box-shadow: var(--tk-shadow);
  border: 1px solid var(--tk-border);
  position: relative;
}

#tk-form .tk-form::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--tk-radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, transparent 60%);
  pointer-events: none;
}

#tk-form .tk-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

#tk-form .tk-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--tk-text);
  letter-spacing: -0.005em;
}

#tk-form .tk-form input[type="text"],
#tk-form .tk-form input[type="tel"],
#tk-form .tk-form input[type="email"] {
  width: 100%;
  height: 48px;
  padding: 12px 14px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--tk-text);
  background: var(--tk-bg-input);
  border: 1.5px solid var(--tk-border);
  border-radius: var(--tk-radius-sm);
  outline: none;
  font-family: inherit;
  font-weight: 500;
  transition:
    border-color 180ms var(--tk-ease),
    background-color 180ms var(--tk-ease),
    box-shadow 180ms var(--tk-ease);
}

#tk-form .tk-form input::placeholder {
  color: var(--tk-text-dim);
  font-weight: 400;
}

#tk-form .tk-form input:hover {
  border-color: var(--tk-border-strong);
}

#tk-form .tk-form input:focus {
  border-color: var(--tk-border-focus);
  background: var(--tk-bg-input-focus);
  box-shadow: 0 0 0 4px var(--tk-primary-glow);
}

#tk-form .tk-field--error input {
  border-color: var(--tk-error);
  background: var(--tk-bg-input);
}

#tk-form .tk-field--error input:focus {
  box-shadow: 0 0 0 4px var(--tk-error-glow);
}

#tk-form .tk-error {
  min-height: 0;
  font-size: 12px;
  font-weight: 500;
  color: var(--tk-error);
  opacity: 0;
  transform: translateY(-2px);
  transition:
    opacity 160ms var(--tk-ease),
    transform 160ms var(--tk-ease),
    min-height 160ms var(--tk-ease);
}

#tk-form .tk-field--error .tk-error {
  opacity: 1;
  transform: translateY(0);
  min-height: 16px;
}

#tk-form .tk-hint {
  font-size: 11px;
  color: var(--tk-text-muted);
  margin-top: 2px;
  letter-spacing: 0.01em;
}
#tk-form .tk-hint:empty,
#tk-form .tk-field--error .tk-hint {
  display: none;
}

#tk-form .tk-submit {
  position: relative;
  height: 52px;
  margin-top: 6px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: #ffffff;
  background: linear-gradient(180deg, var(--tk-primary) 0%, var(--tk-primary-hover) 100%);
  border: none;
  border-radius: var(--tk-radius-sm);
  cursor: pointer;
  font-family: inherit;
  overflow: hidden;
  transition:
    transform 100ms var(--tk-ease),
    box-shadow 180ms var(--tk-ease),
    filter 180ms var(--tk-ease);
  box-shadow: 0 4px 14px var(--tk-primary-glow), 0 1px 2px rgba(0, 0, 0, 0.1);
}

#tk-form .tk-submit:hover:not(:disabled) {
  filter: brightness(1.05);
  box-shadow: 0 8px 24px var(--tk-primary-glow), 0 1px 2px rgba(0, 0, 0, 0.1);
}

#tk-form .tk-submit:active:not(:disabled) {
  transform: translateY(1px);
  box-shadow: 0 2px 8px var(--tk-primary-glow);
}

#tk-form .tk-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  filter: saturate(0.7);
}

#tk-form .tk-submit:disabled::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -50px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: tk-spin 0.7s linear infinite;
}

@keyframes tk-spin {
  to { transform: rotate(360deg); }
}

#tk-form .tk-form-error {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--tk-error);
  background: var(--tk-error-glow);
  border: 1px solid rgba(225, 29, 72, 0.3);
  border-radius: var(--tk-radius-sm);
  animation: tk-shake 0.32s var(--tk-ease);
}

@keyframes tk-shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-4px); }
  40%, 80% { transform: translateX(4px); }
}

#tk-form .tk-honeypot {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

#tk-form .tk-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 40px 28px;
  background: var(--tk-bg);
  border-radius: var(--tk-radius);
  box-shadow: var(--tk-shadow);
  border: 1px solid var(--tk-border);
  text-align: center;
  animation: tk-pop 0.3s var(--tk-ease);
}

@keyframes tk-pop {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

#tk-form .tk-success__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  font-size: 30px;
  color: #ffffff;
  background: linear-gradient(135deg, #10b981 0%, var(--tk-success) 100%);
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(5, 150, 105, 0.3);
}

#tk-form .tk-success__text {
  font-size: 17px;
  font-weight: 600;
  color: var(--tk-text);
  letter-spacing: -0.01em;
}

#tk-form .iti {
  width: 100%;
}

#tk-form .iti--separate-dial-code .iti__selected-flag {
  background: transparent;
  border-radius: var(--tk-radius-sm) 0 0 var(--tk-radius-sm);
}

#tk-form .iti--separate-dial-code .iti__selected-dial-code {
  color: var(--tk-text);
  font-weight: 500;
}

#tk-form .iti__country-list {
  font-size: 14px;
  background: var(--tk-bg-input);
  color: var(--tk-text);
  border: 1px solid var(--tk-border-strong);
  border-radius: var(--tk-radius-sm);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
  max-height: 280px;
  overflow-y: auto;
  z-index: 1000;
  padding: 4px 0;
}

#tk-form .iti__country {
  padding: 8px 14px;
  color: var(--tk-text);
  transition: background-color 120ms var(--tk-ease);
}

#tk-form .iti__country.iti__highlight,
#tk-form .iti__country:hover {
  background: var(--tk-primary-glow);
}

#tk-form .iti__country-name { color: var(--tk-text); }
#tk-form .iti__dial-code    { color: var(--tk-text-muted); }
#tk-form .iti__divider      { border-bottom-color: var(--tk-border); }

#tk-form .iti__search-input {
  background: var(--tk-bg-input);
  color: var(--tk-text);
  border-color: var(--tk-border);
  padding: 10px 14px;
  font-family: inherit;
}

#tk-form .iti--locked .iti__arrow,
#tk-form .iti--locked .iti__dropdown-content {
  display: none !important;
}

#tk-form .iti--locked .iti__selected-flag {
  cursor: default;
  pointer-events: none;
  padding-right: 14px;
}

@media (max-width: 480px) {
  #tk-form {
    max-width: 100%;
    margin: 16px 0;
  }

  #tk-form .tk-form,
  #tk-form .tk-success {
    padding: 24px 18px;
    border-radius: 0;
    border-left: none;
    border-right: none;
    box-shadow: none;
  }

  #tk-form .tk-form input[type="text"],
  #tk-form .tk-form input[type="tel"],
  #tk-form .tk-form input[type="email"] {
    height: 52px;
    font-size: 16px;
  }

  #tk-form .tk-submit {
    height: 56px;
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #tk-form * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}