/* ============================================================
   FILE    : assets/css/forms.css
   PATH    : /httpdocs/assets/css/forms.css
   PURPOSE : All form element styles — text inputs, password,
             email, url, textarea, select, checkbox, radio,
             toggle switch, form groups, labels, validation
             states, error messages, and search fields.
   REQUIRES: tokens.css, base.css
   ============================================================ */

/* ============================================================
   FORM GROUP — wrapper for label + input + error
   ============================================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
}

.form-group + .form-group {
  margin-top: var(--space-5);
}

/* Horizontal layout variant */
.form-group--horizontal {
  flex-direction: row;
  align-items: center;
  gap: var(--space-4);
}

.form-group--horizontal .form-label {
  min-width: 160px;
  margin-bottom: 0;
}

/* ============================================================
   LABELS
   ============================================================ */

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: default;
  user-select: none;
}

/* Required asterisk */
.form-label__required {
  color: var(--color-danger-400);
  font-size: var(--text-sm);
  line-height: 1;
}

/* Optional hint */
.form-label__optional {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: var(--font-normal);
}

/* Label hint text below label */
.form-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
  margin-top: calc(-1 * var(--space-1));
}

/* ============================================================
   BASE INPUT STYLES
   ============================================================ */

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  height: var(--input-height);
  padding: var(--input-padding-y) var(--input-padding-x);
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-input);
  color: var(--input-text);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  line-height: var(--leading-normal);
  transition: border-color 0.2s ease,
              background-color 0.2s ease,
              box-shadow 0.2s ease;
  appearance: none;
  -webkit-appearance: none;
  outline: none;
}

/* Placeholder */
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--input-placeholder);
  opacity: 1;
}

/* Focus */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background-color: var(--input-bg-focus);
  border-color: var(--input-border-focus);
  box-shadow: var(--focus-ring);
}

/* Hover */
.form-input:hover:not(:focus):not(:disabled),
.form-select:hover:not(:focus):not(:disabled),
.form-textarea:hover:not(:focus):not(:disabled) {
  border-color: var(--border-color-2);
}

/* Disabled */
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  background-color: var(--bg-surface-2);
}

/* Read only */
.form-input:read-only {
  background-color: var(--bg-surface-2);
  cursor: default;
  color: var(--text-muted);
}

/* ── Input Sizes ──────────────────────────────────────── */

.form-input--sm {
  height: var(--input-height-sm);
  padding: 6px var(--space-3);
  font-size: var(--text-xs);
}

.form-input--lg {
  height: var(--input-height-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-md);
}

/* ── Validation States ────────────────────────────────── */

/* Error state */
.form-input--error,
.form-select--error,
.form-textarea--error {
  border-color: var(--color-danger-500);
  background-color: rgba(239, 68, 68, 0.04);
}

.form-input--error:focus,
.form-select--error:focus,
.form-textarea--error:focus {
  box-shadow: var(--focus-ring-danger);
  border-color: var(--color-danger-500);
}

/* Success state */
.form-input--success,
.form-select--success,
.form-textarea--success {
  border-color: var(--color-success-500);
  background-color: rgba(34, 197, 94, 0.04);
}

/* Error message */
.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-danger-400);
  line-height: var(--leading-normal);
  animation: fadeDown 0.15s ease;
}

.form-error::before {
  content: '⚠';
  font-size: 11px;
  flex-shrink: 0;
}

/* Success message */
.form-success-msg {
  font-size: var(--text-xs);
  color: var(--color-success-400);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* ============================================================
   INPUT WITH ICON (prefix / suffix)
   ============================================================ */

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

/* Prefix icon */
.input-wrap--prefix .form-input {
  padding-left: calc(var(--input-padding-x) + 24px);
}

/* Suffix icon / button */
.input-wrap--suffix .form-input {
  padding-right: calc(var(--input-padding-x) + 36px);
}

/* Both */
.input-wrap--prefix.input-wrap--suffix .form-input {
  padding-left: calc(var(--input-padding-x) + 24px);
  padding-right: calc(var(--input-padding-x) + 36px);
}

.input-prefix,
.input-suffix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  color: var(--text-muted);
  font-size: var(--text-base);
}

.input-prefix { left: var(--space-3); }
.input-suffix { right: var(--space-3); }

/* Clickable suffix (e.g. password toggle) */
.input-suffix--clickable {
  pointer-events: all;
  cursor: pointer;
  transition: color 0.2s ease;
  padding: var(--space-1);
}

.input-suffix--clickable:hover {
  color: var(--text-primary);
}

/* Input with attached button (URL bar style) */
.input-btn-group {
  display: flex;
  width: 100%;
  gap: 0;
}

.input-btn-group .form-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
  flex: 1;
}

.input-btn-group .form-input:focus {
  border-right: none;
  box-shadow: none;
}

.input-btn-group .form-input:focus + .btn {
  border-color: var(--color-brand-500);
}

.input-btn-group .btn {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  flex-shrink: 0;
  border: 1px solid var(--border-color);
}

/* ============================================================
   TEXTAREA
   ============================================================ */

.form-textarea {
  height: auto;
  min-height: 100px;
  resize: vertical;
  line-height: var(--leading-relaxed);
  padding: var(--space-3) var(--input-padding-x);
}

.form-textarea--sm { min-height: 72px; font-size: var(--text-xs); }
.form-textarea--lg { min-height: 140px; font-size: var(--text-md); }
.form-textarea--no-resize { resize: none; }

/* ============================================================
   SELECT
   ============================================================ */

.form-select {
  cursor: pointer;
  padding-right: calc(var(--space-8));
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
}

.form-select option {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  padding: var(--space-2);
}

/* ============================================================
   CHECKBOX
   ============================================================ */

.form-checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.form-checkbox {
  width: 16px;
  height: 16px;
  min-width: 16px;
  border: 1px solid var(--border-color-2);
  border-radius: var(--radius-sm);
  background-color: var(--input-bg);
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  margin-top: 1px;
  flex-shrink: 0;
}

.form-checkbox:hover {
  border-color: var(--color-brand-500);
}

.form-checkbox:checked {
  background-color: var(--color-brand-500);
  border-color: var(--color-brand-500);
}

/* Checkmark */
.form-checkbox:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

.form-checkbox:focus-visible {
  box-shadow: var(--focus-ring);
}

.form-checkbox:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.form-checkbox-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

.form-checkbox-label a {
  color: var(--color-brand-400);
}

/* ============================================================
   RADIO BUTTON
   ============================================================ */

.form-radio-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.form-radio {
  width: 16px;
  height: 16px;
  min-width: 16px;
  border: 2px solid var(--border-color-2);
  border-radius: var(--radius-full);
  background-color: var(--input-bg);
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  flex-shrink: 0;
}

.form-radio:hover { border-color: var(--color-brand-500); }

.form-radio:checked {
  border-color: var(--color-brand-500);
}

.form-radio:checked::after {
  content: '';
  position: absolute;
  inset: 2px;
  background-color: var(--color-brand-500);
  border-radius: var(--radius-full);
}

.form-radio:focus-visible { box-shadow: var(--focus-ring); }

/* Radio group */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.radio-group--horizontal {
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Radio card variant */
.radio-card-group {
  display: grid;
  gap: var(--space-3);
}

.radio-card-group--cols-2 { grid-template-columns: repeat(2, 1fr); }
.radio-card-group--cols-3 { grid-template-columns: repeat(3, 1fr); }

.radio-card {
  position: relative;
  cursor: pointer;
}

.radio-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-card__label {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  background-color: var(--bg-surface-2);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: var(--transition-base);
  cursor: pointer;
}

.radio-card__label:hover {
  border-color: var(--color-primary-border);
}

.radio-card input:checked + .radio-card__label {
  border-color: var(--color-brand-500);
  background-color: var(--color-primary-subtle);
}

.radio-card__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.radio-card__desc {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ============================================================
   TOGGLE SWITCH
   ============================================================ */

.toggle-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.toggle-wrap input[type="checkbox"] {
  display: none;
}

.toggle {
  position: relative;
  width: 36px;
  height: 20px;
  background-color: var(--bg-surface-3);
  border: 1px solid var(--border-color-2);
  border-radius: var(--radius-full);
  transition: background-color 0.2s ease, border-color 0.2s ease;
  flex-shrink: 0;
  cursor: pointer;
}

.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background-color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.toggle-wrap input:checked + .toggle {
  background-color: var(--color-brand-500);
  border-color: var(--color-brand-600);
}

.toggle-wrap input:checked + .toggle::after {
  transform: translateX(16px);
  background-color: #fff;
}

.toggle-wrap input:disabled + .toggle {
  opacity: 0.45;
  cursor: not-allowed;
}

.toggle__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ============================================================
   RANGE / SLIDER
   ============================================================ */

.form-range {
  width: 100%;
  height: 6px;
  background: var(--bg-surface-2);
  border-radius: var(--radius-full);
  outline: none;
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--border-color);
}

.form-range::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  background: var(--color-brand-500);
  cursor: pointer;
  border: 2px solid var(--bg-surface);
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease;
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.form-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  background: var(--color-brand-500);
  cursor: pointer;
  border: 2px solid var(--bg-surface);
}

/* ============================================================
   SEARCH INPUT — special styled input for URL/search
   ============================================================ */

.search-input-wrap {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  height: 52px;
  padding: 0 var(--space-5) 0 52px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  color: var(--text-primary);
  font-size: var(--text-md);
  font-family: var(--font-mono);
  transition: var(--transition-base);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.search-input:hover {
  border-color: var(--border-color-2);
}

.search-input:focus {
  border-color: var(--color-brand-500);
  background-color: var(--bg-surface-2);
  box-shadow: var(--shadow-brand);
}

.search-input__icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 20px;
  pointer-events: none;
  transition: color 0.2s ease;
}

.search-input-wrap:focus-within .search-input__icon {
  color: var(--color-brand-400);
}

/* Large scan URL bar */
.scan-bar {
  display: flex;
  gap: 0;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

.scan-bar .form-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  height: 52px;
  font-size: var(--text-md);
  flex: 1;
  border-right: none;
  font-family: var(--font-mono);
}

.scan-bar .form-input:focus {
  border-color: var(--color-brand-500);
  box-shadow: none;
  z-index: 1;
}

.scan-bar .btn {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  height: 52px;
  padding: 0 var(--space-6);
  font-size: var(--text-md);
  flex-shrink: 0;
  border: 1px solid var(--color-brand-600);
}

/* ============================================================
   FORM SECTION DIVIDER
   ============================================================ */

.form-section {
  padding-top: var(--space-6);
  margin-top: var(--space-6);
  border-top: 1px solid var(--border-color);
}

.form-section:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: none;
}

.form-section__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-section__subtitle {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: calc(-1 * var(--space-2));
  margin-bottom: var(--space-4);
}

/* ============================================================
   CHARACTER COUNTER
   ============================================================ */

.char-counter {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-align: right;
  margin-top: calc(-1 * var(--space-1));
}

.char-counter--warning { color: var(--color-warning-400); }
.char-counter--error   { color: var(--color-danger-400); }

/* ============================================================
   FORM CARD (auth pages — login / register)
   ============================================================ */

.form-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-3xl);
  padding: var(--space-10) var(--space-10);
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-2xl);
}

.form-card__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-8);
}

.form-card__logo-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-brand-500), var(--color-brand-700));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: var(--font-bold);
  color: #fff;
  box-shadow: var(--shadow-brand);
  margin-bottom: var(--space-4);
}

.form-card__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  text-align: center;
  letter-spacing: var(--tracking-tight);
}

.form-card__subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-align: center;
  margin-top: var(--space-2);
}

.form-card__footer {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.form-card__footer a {
  color: var(--color-brand-400);
  font-weight: var(--font-medium);
}

.form-card__footer a:hover {
  color: var(--color-brand-300);
}

.form-card__divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

.form-card__divider-line {
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}

.form-card__divider-text {
  font-size: var(--text-xs);
  color: var(--text-muted);
  white-space: nowrap;
  font-family: var(--font-mono);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 480px) {
  .form-card {
    padding: var(--space-6);
    border-radius: var(--radius-2xl);
  }

  .radio-card-group--cols-2,
  .radio-card-group--cols-3 {
    grid-template-columns: 1fr;
  }

  .form-group--horizontal {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-group--horizontal .form-label {
    min-width: auto;
  }

  .scan-bar {
    flex-direction: column;
    gap: var(--space-2);
  }

  .scan-bar .form-input,
  .scan-bar .btn {
    border-radius: var(--radius-xl) !important;
    border: 1px solid var(--border-color) !important;
  }
}

/* ── Password wrapper ────────────────────────────────────── */
.pwd-wrap {
  position: relative;
}

.pwd-wrap .form-input {
  padding-right: 44px;
}

.pwd-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 16px;
  padding: 4px;
  line-height: 1;
  transition: color 0.15s;
}

.pwd-toggle:hover { color: var(--text-secondary); }

/* ── Password strength meter ─────────────────────────────── */
.strength-meter {
  display: flex;
  gap: 4px;
  margin-top: var(--space-1);
}

.strength-meter__bar {
  flex: 1;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-2);
  transition: background 0.3s;
}

.strength-meter__bar--1 { background: var(--color-danger-500); }
.strength-meter__bar--2 { background: var(--color-warning-500); }
.strength-meter__bar--3 { background: var(--color-brand-500); }
.strength-meter__bar--4 { background: var(--color-success-500); }

.strength-label {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 3px;
}

/* ── Checkbox & Radio group ──────────────────────────────── */
.form-check-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.form-check:hover { color: var(--text-primary); }

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  accent-color: var(--color-brand-500);
  cursor: pointer;
}

/* ── Select with icon ────────────────────────────────────── */
.select-wrap {
  position: relative;
}

.select-wrap .form-select {
  padding-right: 32px;
  appearance: none;
}

.select-wrap::after {
  content: '▾';
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-muted);
  font-size: 10px;
}

/* ── Form card (auth pages) ──────────────────────────────── */
.form-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 440px;
}

.form-card__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.form-card__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-extrabold);
  color: var(--text-primary);
  text-align: center;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-1);
}

.form-card__subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-align: center;
  margin-bottom: var(--space-6);
}

/* ── Scan bar (dashboard) ────────────────────────────────── */
.scan-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-2xl);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  transition: border-color 0.2s, box-shadow 0.2s;
  max-width: 680px;
  width: 100%;
}

.scan-bar:focus-within {
  border-color: var(--color-brand-500);
  box-shadow: var(--shadow-brand);
}

.scan-bar__input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: var(--text-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  min-width: 0;
}

.scan-bar__input::placeholder { color: var(--text-muted); }

.scan-bar__btn {
  flex-shrink: 0;
}