/* ===================================
   INPUT ATOM - Atomic Design Foundation
   ===================================

   Single source of truth for all input variants.
   Uses design tokens from design-tokens.css
*/

/* Input wrapper for icon positioning */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

/* Base input styles - Layer 4 (White surface) */
.input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-family-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--text-body);                  /* Use body text color */
  background-color: var(--bg-surface);      /* #ffffff - Top layer */
  border: var(--border-width-1) solid var(--border-default);
  border-radius: var(--border-radius-md);
  transition: all var(--duration-200) var(--easing-out);
  box-sizing: border-box;
}

/* Input focus styles */
.input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: var(--focus-ring-shadow);
}

/* Input disabled state */
.input:disabled {
  background-color: var(--bg-panel);        /* Use panel color for disabled */
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.7;
}

/* Input readonly state */
.input:read-only {
  background-color: var(--bg-panel);        /* Use panel color for readonly */
  cursor: default;
}

/* ===================================
   INPUT VARIANTS
   =================================== */

.input-default {
  /* Default variant - already defined in base styles */
}

.input-error {
  border-color: var(--color-error);
}

.input-error:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px var(--color-error-light);
}

.input-success {
  border-color: var(--color-success);
}

.input-success:focus {
  border-color: var(--color-success);
  box-shadow: var(--focus-ring-shadow);
}

/* ===================================
   INPUT SIZES
   =================================== */

.input-sm {
  padding: var(--space-1_5) var(--space-2_5);
  font-size: var(--text-xs);
  min-height: var(--input-height-sm);
}

.input-md {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  min-height: var(--input-height-md);
}

.input-lg {
  padding: var(--space-2_5) var(--space-4);
  font-size: var(--text-base);
  min-height: var(--input-height-lg);
}

/* ===================================
   INPUT WITH ICONS
   =================================== */

.input-with-icon {
  padding-left: var(--space-6);
}

.input-icon {
  position: absolute;
  left: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 1;
}

.input-icon svg {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
  stroke-width: 2;
}

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

textarea.input {
  resize: vertical;
  min-height: var(--space-20);
  line-height: var(--line-height-relaxed);
}

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

select.input {
  appearance: none;
  background-color: var(--bg-surface);
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-2) center;
  background-size: var(--icon-size-sm);
  padding-right: var(--space-6);
  cursor: pointer;
}

/* ===================================
   INPUT GROUPS
   =================================== */

.input-group {
  display: flex;
  align-items: stretch;
}

.input-group .input {
  border-radius: 0;
  margin: 0;
}

.input-group .input:first-child {
  border-radius: var(--border-radius-md) 0 0 var(--border-radius-md);
}

.input-group .input:last-child {
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
}

.input-group .input:not(:first-child) {
  border-left: 0;
}

/* ===================================
   FORM VALIDATION
   =================================== */

/* Automatic :valid/:invalid borders disabled - too aggressive.
   Use explicit error/success classes when validation feedback is needed. */

/* ===================================
   PLACEHOLDER STYLES
   =================================== */

.input::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

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

@media (max-width: 640px) {
  .input {
    font-size: var(--text-sm);
  }

  .input-sm {
    padding: var(--space-1) var(--space-2);
    min-height: var(--space-8);
  }

  .input-md {
    padding: var(--space-1_5) var(--space-2_5);
    min-height: var(--space-9);
  }

  .input-lg {
    padding: var(--space-2) var(--space-3);
    min-height: var(--space-10);
  }

  textarea.input {
    min-height: var(--space-16);
  }
}