/* ========================================
   MODERN FORM SYSTEM
   Accessible & Responsive Form Components
   ======================================== */

/* ========================================
   FORM CONTAINER
   ======================================== */

.form-container {
	max-width: 100%;
	margin: 0 auto;
	padding: var(--space-6);
	background-color: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-xl);
	box-shadow: var(--shadow-sm);
}

@media (min-width: 640px) {
	.form-container {
		max-width: 28rem; /* 448px */
		padding: var(--space-8);
	}
}

@media (min-width: 768px) {
	.form-container {
		max-width: 32rem; /* 512px */
		padding: var(--space-10);
	}
}

.form-header {
	text-align: center;
	margin-bottom: var(--space-8);
}

.form-title {
	font-size: var(--text-2xl);
	font-weight: var(--font-bold);
	color: var(--color-text-primary);
	margin-bottom: var(--space-2);
}

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

/* ========================================
   FORM LAYOUT
   ======================================== */

.form-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-6);
}

@media (min-width: 640px) {
	.form-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

.form-grid-full {
	grid-column: 1 / -1;
}

/* ========================================
   FORM GROUPS
   ======================================== */

.form-group {
	margin-bottom: var(--space-6);
}

.form-group:last-child {
	margin-bottom: 0;
}

.form-label {
	display: block;
	margin-bottom: var(--space-2);
	font-size: var(--text-sm);
	font-weight: var(--font-semibold);
	color: var(--color-text-primary);
	line-height: var(--leading-tight);
}

.form-label.required::after {
	content: ' *';
	color: var(--color-error);
	font-weight: var(--font-bold);
}

.form-label-optional {
	font-size: var(--text-xs);
	color: var(--color-text-tertiary);
	font-weight: var(--font-normal);
	margin-left: var(--space-1);
}

/* ========================================
   INPUT FIELDS
   ======================================== */

.form-input {
	display: block;
	width: 100%;
	height: var(--input-height-base);
	padding: var(--space-3) var(--space-4);
	font-size: var(--text-sm);
	font-weight: var(--font-normal);
	line-height: var(--leading-normal);
	color: var(--color-text-primary);
	background-color: var(--color-surface);
	border: 2px solid var(--color-border);
	border-radius: var(--radius-lg);
	transition: var(--transition-all);
	box-shadow: var(--shadow-xs);
}

.form-input:focus {
	outline: none;
	border-color: var(--color-primary);
	box-shadow: 0 0 0 3px var(--color-primary) / 0.1, var(--shadow-sm);
	transform: translateY(-1px);
}

.form-input:hover:not(:focus):not(:disabled) {
	border-color: var(--color-border-hover);
	box-shadow: var(--shadow-sm);
}

.form-input:disabled {
	background-color: var(--color-background-secondary);
	color: var(--color-text-tertiary);
	cursor: not-allowed;
	opacity: 0.6;
}

.form-input::placeholder {
	color: var(--color-text-tertiary);
	font-style: italic;
}

/* Input Sizes */
.form-input-sm {
	height: var(--input-height-sm);
	padding: var(--space-2) var(--space-3);
	font-size: var(--text-xs);
}

.form-input-lg {
	height: var(--input-height-lg);
	padding: var(--space-4) var(--space-5);
	font-size: var(--text-base);
}

/* Input Variants */
.form-input-success {
	border-color: var(--color-success);
}

.form-input-success:focus {
	border-color: var(--color-success);
	box-shadow: 0 0 0 3px var(--color-success) / 0.1;
}

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

.form-input-warning:focus {
	border-color: var(--color-warning);
	box-shadow: 0 0 0 3px var(--color-warning) / 0.1;
}

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

.form-input-error:focus {
	border-color: var(--color-error);
	box-shadow: 0 0 0 3px var(--color-error) / 0.1;
}

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

.form-textarea {
	display: block;
	width: 100%;
	min-height: 6rem;
	padding: var(--space-3) var(--space-4);
	font-size: var(--text-sm);
	font-weight: var(--font-normal);
	line-height: var(--leading-relaxed);
	color: var(--color-text-primary);
	background-color: var(--color-surface);
	border: 2px solid var(--color-border);
	border-radius: var(--radius-lg);
	transition: var(--transition-all);
	box-shadow: var(--shadow-xs);
	resize: vertical;
	font-family: inherit;
}

.form-textarea:focus {
	outline: none;
	border-color: var(--color-primary);
	box-shadow: 0 0 0 3px var(--color-primary) / 0.1, var(--shadow-sm);
	transform: translateY(-1px);
}

.form-textarea:hover:not(:focus):not(:disabled) {
	border-color: var(--color-border-hover);
	box-shadow: var(--shadow-sm);
}

.form-textarea:disabled {
	background-color: var(--color-background-secondary);
	color: var(--color-text-tertiary);
	cursor: not-allowed;
	opacity: 0.6;
}

.form-textarea::placeholder {
	color: var(--color-text-tertiary);
	font-style: italic;
}

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

.form-select {
	display: block;
	width: 100%;
	height: var(--input-height-base);
	padding: var(--space-3) var(--space-4);
	padding-right: 2.5rem;
	font-size: var(--text-sm);
	font-weight: var(--font-normal);
	line-height: var(--leading-normal);
	color: var(--color-text-primary);
	background-color: var(--color-surface);
	background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
	background-position: right 0.75rem center;
	background-repeat: no-repeat;
	background-size: 1rem;
	border: 2px solid var(--color-border);
	border-radius: var(--radius-lg);
	transition: var(--transition-all);
	box-shadow: var(--shadow-xs);
	cursor: pointer;
	appearance: none;
}

.form-select:focus {
	outline: none;
	border-color: var(--color-primary);
	box-shadow: 0 0 0 3px var(--color-primary) / 0.1, var(--shadow-sm);
	transform: translateY(-1px);
}

.form-select:hover:not(:focus):not(:disabled) {
	border-color: var(--color-border-hover);
	box-shadow: var(--shadow-sm);
}

.form-select:disabled {
	background-color: var(--color-background-secondary);
	color: var(--color-text-tertiary);
	cursor: not-allowed;
	opacity: 0.6;
}

/* ========================================
   CHECKBOX & RADIO
   ======================================== */

.form-checkbox,
.form-radio {
	display: flex;
	align-items: flex-start;
	gap: var(--space-3);
	margin-bottom: var(--space-4);
	cursor: pointer;
}

.form-checkbox:last-child,
.form-radio:last-child {
	margin-bottom: 0;
}

.form-checkbox-input,
.form-radio-input {
	width: 1.25rem;
	height: 1.25rem;
	margin: 0;
	cursor: pointer;
	accent-color: var(--color-primary);
}

.form-checkbox-label,
.form-radio-label {
	font-size: var(--text-sm);
	font-weight: var(--font-medium);
	color: var(--color-text-primary);
	line-height: var(--leading-relaxed);
	cursor: pointer;
	flex: 1;
}

.form-checkbox-description,
.form-radio-description {
	font-size: var(--text-xs);
	color: var(--color-text-secondary);
	margin-top: var(--space-1);
	line-height: var(--leading-relaxed);
}

/* ========================================
   FILE UPLOAD
   ======================================== */

.form-file {
	position: relative;
	display: block;
	width: 100%;
}

.form-file-input {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.form-file-label {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-2);
	width: 100%;
	min-height: 8rem;
	padding: var(--space-6);
	font-size: var(--text-sm);
	font-weight: var(--font-medium);
	color: var(--color-text-secondary);
	background-color: var(--color-background-secondary);
	border: 2px dashed var(--color-border);
	border-radius: var(--radius-lg);
	transition: var(--transition-all);
	cursor: pointer;
	text-align: center;
}

.form-file-label:hover {
	color: var(--color-text-primary);
	border-color: var(--color-primary);
	background-color: var(--color-primary) / 0.05;
}

.form-file-label i {
	font-size: var(--text-2xl);
	color: var(--color-primary);
}

.form-file-text {
	display: flex;
	flex-direction: column;
	gap: var(--space-1);
}

.form-file-name {
	font-size: var(--text-sm);
	font-weight: var(--font-medium);
	color: var(--color-text-primary);
}

.form-file-hint {
	font-size: var(--text-xs);
	color: var(--color-text-tertiary);
}

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

.form-error {
	display: flex;
	align-items: center;
	gap: var(--space-2);
	margin-top: var(--space-2);
	font-size: var(--text-xs);
	font-weight: var(--font-medium);
	color: var(--color-error);
}

.form-error i {
	font-size: var(--text-sm);
	flex-shrink: 0;
}

.form-success {
	display: flex;
	align-items: center;
	gap: var(--space-2);
	margin-top: var(--space-2);
	font-size: var(--text-xs);
	font-weight: var(--font-medium);
	color: var(--color-success);
}

.form-success i {
	font-size: var(--text-sm);
	flex-shrink: 0;
}

.form-hint {
	margin-top: var(--space-2);
	font-size: var(--text-xs);
	color: var(--color-text-tertiary);
	line-height: var(--leading-relaxed);
}

/* ========================================
   FORM ACTIONS
   ======================================== */

.form-actions {
	display: flex;
	flex-direction: column;
	gap: var(--space-3);
	margin-top: var(--space-8);
	padding-top: var(--space-6);
	border-top: 1px solid var(--color-border);
}

@media (min-width: 640px) {
	.form-actions {
		flex-direction: row;
		justify-content: flex-end;
	}
}

.form-actions-center {
	justify-content: center;
}

.form-actions-between {
	justify-content: space-between;
}

/* ========================================
   FORM SECTIONS
   ======================================== */

.form-section {
	margin-bottom: var(--space-8);
	padding-bottom: var(--space-6);
	border-bottom: 1px solid var(--color-border);
}

.form-section:last-child {
	margin-bottom: 0;
	padding-bottom: 0;
	border-bottom: none;
}

.form-section-title {
	font-size: var(--text-lg);
	font-weight: var(--font-semibold);
	color: var(--color-text-primary);
	margin-bottom: var(--space-4);
}

.form-section-description {
	font-size: var(--text-sm);
	color: var(--color-text-secondary);
	margin-bottom: var(--space-6);
	line-height: var(--leading-relaxed);
}

/* ========================================
   INLINE FORMS
   ======================================== */

.form-inline {
	display: flex;
	flex-direction: column;
	gap: var(--space-4);
	align-items: stretch;
}

@media (min-width: 640px) {
	.form-inline {
		flex-direction: row;
		align-items: end;
	}
}

.form-inline .form-group {
	margin-bottom: 0;
	flex: 1;
}

.form-inline .form-actions {
	margin-top: 0;
	padding-top: 0;
	border-top: none;
}

/* ========================================
   SEARCH FORMS
   ======================================== */

.form-search {
	position: relative;
	display: flex;
	align-items: center;
}

.form-search-input {
	padding-left: 2.5rem;
	padding-right: 2.5rem;
}

.form-search-icon {
	position: absolute;
	left: var(--space-3);
	top: 50%;
	transform: translateY(-50%);
	font-size: var(--text-sm);
	color: var(--color-text-tertiary);
	pointer-events: none;
}

.form-search-clear {
	position: absolute;
	right: var(--space-3);
	top: 50%;
	transform: translateY(-50%);
	display: flex;
	align-items: center;
	justify-content: center;
	width: 1.25rem;
	height: 1.25rem;
	background-color: var(--color-background-secondary);
	border: none;
	border-radius: var(--radius-full);
	color: var(--color-text-tertiary);
	cursor: pointer;
	transition: var(--transition-all);
}

.form-search-clear:hover {
	background-color: var(--color-error);
	color: var(--color-text-inverse);
}

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

/* Mobile */
@media (max-width: 639px) {
	.form-container {
		padding: var(--space-4);
		margin: var(--space-4);
	}
	
	.form-title {
		font-size: var(--text-xl);
	}
	
	.form-actions {
		margin-top: var(--space-6);
		padding-top: var(--space-4);
	}
}

/* Tablet */
@media (min-width: 640px) and (max-width: 767px) {
	.form-container {
		padding: var(--space-6);
	}
}

/* Desktop */
@media (min-width: 1024px) {
	.form-container {
		padding: var(--space-12);
	}
	
	.form-title {
		font-size: var(--text-3xl);
	}
}

/* ========================================
   ACCESSIBILITY IMPROVEMENTS
   ======================================== */

/* Focus Management */
.form-input:focus-visible,
.form-textarea:focus-visible,
.form-select:focus-visible,
.form-checkbox-input:focus-visible,
.form-radio-input:focus-visible,
.form-file-input:focus-visible + .form-file-label {
	outline: 2px solid var(--color-primary);
	outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
	.form-input,
	.form-textarea,
	.form-select {
		border-width: 2px;
	}
	
	.form-input:focus,
	.form-textarea:focus,
	.form-select:focus {
		border-width: 3px;
	}
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
	.form-input:focus,
	.form-textarea:focus,
	.form-select:focus {
		transform: none;
	}
}

/* ========================================
   DARK MODE SPECIFIC STYLES
   ======================================== */

[data-theme="dark"] .form-container {
	box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .form-file-label {
	background-color: var(--color-background-tertiary);
}

[data-theme="dark"] .form-search-clear {
	background-color: var(--color-background-tertiary);
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
	.form-container {
		box-shadow: none;
		border: 1px solid #000;
	}
	
	.form-actions {
		display: none;
	}
	
	.form-file-label {
		border-style: solid;
	}
}