/* Buttons, forms, floating labels */
/* ============================================
   BUTTONS & FORM ELEMENTS
   ============================================ */

/* ── Base Button ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  padding: 13px var(--sp-6);
  border-radius: var(--r-full);
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition:
    transform 0.2s var(--ease-spring),
    box-shadow 0.2s var(--ease-out),
    background 0.2s var(--ease-out),
    color 0.2s var(--ease-out),
    border-color 0.2s var(--ease-out),
    opacity 0.2s;
  user-select: none;
  white-space: nowrap;
}

.btn:active { transform: scale(0.96); }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ── Ripple ── */
.btn::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  width: 0; height: 0;
  background: rgba(255,255,255,0.3);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s, height 0.5s, opacity 0.5s;
  opacity: 0;
}

.btn.ripple::after {
  width: 300px; height: 300px;
  opacity: 0;
  transition: width 0.4s var(--ease-out), height 0.4s var(--ease-out), opacity 0.4s;
}

/* ── Primary ── */
.btn-primary {
  background: var(--clr-primary);
  color: white;
  border-color: var(--clr-primary);
  box-shadow: 0 4px 16px rgba(229,57,53,0.30);
}

.btn-primary:hover {
  background: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
  box-shadow: 0 8px 24px rgba(229,57,53,0.40);
  transform: translateY(-2px);
}

/* ── Secondary ── */
.btn-secondary {
  background: var(--border-subtle);
  color: var(--txt-primary);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background: var(--border-medium);
  transform: translateY(-1px);
}

/* ── Outline ── */
.btn-outline {
  background: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}

.btn-outline:hover {
  background: var(--clr-primary);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(229,57,53,0.25);
}

/* ── Ghost ── */
.btn-ghost {
  background: transparent;
  color: var(--txt-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--border-subtle);
  color: var(--txt-primary);
}

/* ── Danger ── */
.btn-danger {
  background: rgba(239,68,68,0.1);
  color: var(--clr-error);
  border-color: rgba(239,68,68,0.2);
}

.btn-danger:hover {
  background: var(--clr-error);
  color: white;
  border-color: var(--clr-error);
  box-shadow: 0 4px 16px rgba(239,68,68,0.35);
}

/* ── Success ── */
.btn-success {
  background: var(--clr-accent);
  color: white;
  border-color: var(--clr-accent);
  box-shadow: 0 4px 16px rgba(34,197,94,0.3);
}

.btn-success:hover {
  background: var(--clr-accent-dark);
  border-color: var(--clr-accent-dark);
  transform: translateY(-1px);
}

/* ── Sizes ── */
.btn-sm {
  font-size: 0.8125rem;
  padding: 8px var(--sp-4);
}

.btn-lg {
  font-size: 1rem;
  padding: 16px var(--sp-8);
}

.btn-icon {
  padding: 10px;
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  flex-shrink: 0;
}

.btn-icon-sm {
  padding: 7px;
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
}

/* ── Loading Spinner in Button ── */
.btn-loading {
  pointer-events: none;
}

.btn-spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
  position: relative;
  margin-bottom: 8px;
}

/* ── Floating Label Input ── */
.input-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.input-field {
  width: 100%;
  height: 40px;
  background: var(--clr-bg);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--r-md);
  padding: 0 10px;
  font-size: 0.875rem;
  color: var(--txt-primary);
  font-family: var(--font-body);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

[data-theme="dark"] .input-field {
  background: rgba(255,255,255,0.04);
}

.input-field:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(229,57,53,0.12);
  background: var(--clr-surface);
}

.input-field.has-icon { padding-left: 36px; }

.input-label {
  position: static;
  order: -1;
  font-size: 0.8rem;
  color: var(--txt-secondary);
  pointer-events: none;
  transition: color 0.2s var(--ease-out);
  font-weight: 600;
  line-height: 1.2;
}

.input-label.has-icon { left: auto; }

.input-field:focus + .input-label,
.input-field:not(:placeholder-shown) + .input-label {
  color: var(--clr-primary);
  font-size: 0.875rem;
  letter-spacing: 0;
  text-transform: none;
}

.input-icon {
  position: absolute;
  left: 14px;
  top: calc(100% - 20px);
  transform: translateY(-50%);
  color: var(--txt-muted);
  font-size: 1rem;
  pointer-events: none;
  transition: color 0.2s;
}

.input-field:focus ~ .input-icon { color: var(--clr-primary); }

/* Select */
.select-field {
  width: 100%;
  height: 40px;
  background: var(--clr-bg);
  border: 1.5px solid var(--border-medium);
  border-radius: var(--r-md);
  padding: 12px 36px 4px 10px;
  font-size: 0.875rem;
  color: var(--txt-primary);
  font-family: var(--font-body);
  appearance: none;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

[data-theme="dark"] .select-field {
  background: rgba(255,255,255,0.04);
}

.select-field:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(229,57,53,0.12);
  background: var(--clr-surface);
}

.select-wrapper {
  position: relative;
}

.select-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--txt-muted);
  font-size: 0.75rem;
  transition: transform 0.2s, color 0.2s;
}

.select-field:focus ~ .select-arrow {
  color: var(--clr-primary);
  transform: translateY(-50%) rotate(180deg);
}

/* Error state */
.input-error .input-field,
.input-error .select-field {
  border-color: var(--clr-error);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.10);
}

.field-error {
  font-size: 0.78rem;
  color: var(--clr-error);
  margin-top: var(--sp-2);
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  animation: errorIn 0.2s var(--ease-out);
}

@keyframes errorIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Success state */
.input-success .input-field,
.input-success .select-field {
  border-color: var(--clr-accent);
}

/* ── Password Toggle Visibility ── */
.input-toggle-visibility {
  position: absolute;
  right: 10px;
  top: 63%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--txt-muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--r-sm);
  transition: color 0.2s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.input-toggle-visibility:hover {
  color: var(--txt-primary);
  background: var(--border-subtle);
}

.input-toggle-visibility:focus {
  outline: none;
  color: var(--clr-primary);
  box-shadow: 0 0 0 2px rgba(229,57,53,0.2);
}