/* ==========================================================================
   SAMANSRO Construction — Enhanced form validation + success overlay
   Depends on brand tokens declared in variables.css
   ========================================================================== */

:root {
  --form-danger: #DC2626;
  --form-danger-soft: rgba(220, 38, 38, 0.12);
  --form-success: #16A34A;
}

/* ------------------------------ Field states ---------------------------- */

.form-group {
  position: relative;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--form-danger);
  background-color: #FFF7F7;
  animation: field-shake 0.35s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

@media (prefers-reduced-motion: reduce) {
  .form-input.error,
  .form-select.error,
  .form-textarea.error {
    animation: none;
  }
}

@keyframes field-shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(3px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.form-input.valid,
.form-select.valid,
.form-textarea.valid {
  border-color: rgba(22, 163, 74, 0.55);
}

/* Inline error messages: animate in smoothly, collapse when hidden */
.form-error-text {
  display: block;
  overflow: hidden;
  max-height: 0;
  margin-top: 0;
  opacity: 0;
  transform: translateY(-4px);
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--form-danger);
  transition: opacity 0.25s ease, transform 0.25s ease, max-height 0.25s ease,
              margin-top 0.25s ease;
}

.form-error-text[hidden] {
  display: block; /* keep the element in flow so the transition can run */
}

.form-error-text.is-visible {
  max-height: 4rem;
  margin-top: 0.4rem;
  opacity: 1;
  transform: translateY(0);
}

.form-error-text::before {
  content: '';
  display: inline-block;
  width: 0.85em;
  height: 0.85em;
  margin-right: 0.35rem;
  vertical-align: -0.1em;
  background: var(--form-danger);
  border-radius: 50%;
  -webkit-mask: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12 2a10 10 0 100 20 10 10 0 000-20zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* Keyboard accessibility: always visible focus ring */
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible,
.form-submit:focus-visible {
  outline: 3px solid rgba(20, 45, 156, 0.35);
  outline-offset: 2px;
}

/* ------------------------- Submit button state -------------------------- */

.form-submit {
  min-height: 52px;
  gap: 0.6rem;
}

.form-submit .form-submit-label {
  transition: opacity 0.2s ease;
}

.form-submit.loading .form-submit-label {
  opacity: 0;
}

/* --------------------------- Success overlay ---------------------------- */

.success-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  visibility: hidden;
  opacity: 0;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(255, 212, 0, 0.18), transparent 60%),
    linear-gradient(160deg, var(--primary) 0%, var(--secondary) 55%, #0A1360 100%);
  backdrop-filter: blur(6px);
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.success-overlay.is-active {
  visibility: visible;
  opacity: 1;
}

.success-overlay__panel {
  width: min(560px, 100%);
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 5vw, 3rem);
  text-align: center;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px rgba(4, 10, 50, 0.45);
  backdrop-filter: blur(18px) saturate(140%);
  transform: translateY(18px) scale(0.97);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.45s ease;
}

.success-overlay.is-active .success-overlay__panel {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.success-overlay__icon {
  width: 92px;
  height: 92px;
  margin: 0 auto 1.5rem;
}

.success-overlay__icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.success-overlay__circle {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  stroke-linecap: round;
}

.success-overlay__check {
  fill: none;
  stroke: #FFFFFF;
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
}

.success-overlay.is-active .success-overlay__circle {
  animation: draw-circle 0.7s cubic-bezier(0.65, 0, 0.45, 1) 0.15s forwards;
}

.success-overlay.is-active .success-overlay__check {
  animation: draw-check 0.4s cubic-bezier(0.65, 0, 0.45, 1) 0.75s forwards;
}

@keyframes draw-circle {
  to { stroke-dashoffset: 0; }
}

@keyframes draw-check {
  to { stroke-dashoffset: 0; }
}

.success-overlay__title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #FFFFFF;
  margin: 0 0 0.75rem;
}

.success-overlay__text {
  font-size: clamp(0.98rem, 2.4vw, 1.075rem);
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 auto 2rem;
  max-width: 34ch;
}

.success-overlay__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.success-overlay__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.75rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.success-overlay__btn--primary {
  background: var(--accent);
  color: var(--primary);
}

.success-overlay__btn--primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

.success-overlay__btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: #FFFFFF;
  text-decoration: none;
}

.success-overlay__btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.success-overlay__btn:focus-visible {
  outline: 3px solid var(--accent-light);
  outline-offset: 3px;
}

body.overlay-open {
  overflow: hidden;
}

@media (max-width: 480px) {
  .success-overlay__actions {
    flex-direction: column;
  }

  .success-overlay__btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .success-overlay,
  .success-overlay__panel,
  .success-overlay__circle,
  .success-overlay__check {
    transition-duration: 0.01ms;
    animation: none;
    stroke-dashoffset: 0;
  }
}