/**
 * Pure CSS Forms & Buttons - Complete Component System
 * ====================================================
 * Professional form controls, buttons, and interactive elements
 */

/* Form Variables */
:root {
    --form-border-color: #d1d5db;
    --form-border-color-focus: #4b5563;
    --form-border-radius: 6px;
    --form-padding-vertical: 0.75rem;
    --form-padding-horizontal: 1rem;
    --form-font-size: 0.875rem;
    --form-line-height: 1.5;
    --form-transition: all 0.15s ease-in-out;
    
    --button-border-radius: 6px;
    --button-padding-vertical: 0.75rem;
    --button-padding-horizontal: 1.5rem;
    --button-font-size: 0.875rem;
    --button-font-weight: 500;
    --button-line-height: 1.5;
    --button-transition: all 0.15s ease-in-out;
}

/* Base Form Styles */
.pure-form-control {
    display: block;
    width: 100%;
    padding: var(--form-padding-vertical) var(--form-padding-horizontal);
    font-family: inherit;
    font-size: var(--form-font-size);
    font-weight: 400;
    line-height: var(--form-line-height);
    color: #374151;
    background-color: #ffffff;
    background-image: none;
    border: 1px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: var(--form-transition);
    appearance: none;
}

.pure-form-control:focus {
    color: #374151;
    background-color: #ffffff;
    border-color: var(--form-border-color-focus);
    outline: 0;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05), 0 0 0 3px rgba(75, 85, 99, 0.1);
}

.pure-form-control::placeholder {
    color: #9ca3af;
    opacity: 1;
}

.pure-form-control:disabled,
.pure-form-control[readonly] {
    background-color: #f9fafb;
    opacity: 1;
    cursor: not-allowed;
}

/* Form Control Sizes */
.pure-form-control-sm {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 4px;
}

.pure-form-control-lg {
    padding: 1rem 1.25rem;
    font-size: 1rem;
    border-radius: 8px;
}

/* Input Groups */
.pure-input-group {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    width: 100%;
}

.pure-input-group > .pure-form-control,
.pure-input-group > .pure-form-select,
.pure-input-group > .pure-input-group-text {
    position: relative;
    flex: 1 1 auto;
    width: 1%;
    min-width: 0;
}

.pure-input-group > .pure-form-control:focus,
.pure-input-group > .pure-form-select:focus {
    z-index: 3;
}

.pure-input-group-text {
    display: flex;
    align-items: center;
    padding: var(--form-padding-vertical) var(--form-padding-horizontal);
    font-size: var(--form-font-size);
    font-weight: 400;
    line-height: var(--form-line-height);
    color: #6b7280;
    text-align: center;
    white-space: nowrap;
    background-color: #f9fafb;
    border: 1px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
}

/* Checkboxes and Radios */
.pure-form-check {
    display: block;
    min-height: 1.5rem;
    padding-left: 1.5rem;
    margin-bottom: 0.125rem;
}

.pure-form-check .pure-form-check-input {
    float: left;
    margin-left: -1.5rem;
}

.pure-form-check-input {
    width: 1rem;
    height: 1rem;
    margin-top: 0.25rem;
    vertical-align: top;
    background-color: #ffffff;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border: 1px solid var(--form-border-color);
    appearance: none;
    cursor: pointer;
}

.pure-form-check-input[type="checkbox"] {
    border-radius: 0.25rem;
}

.pure-form-check-input[type="radio"] {
    border-radius: 50%;
}

.pure-form-check-input:active {
    filter: brightness(90%);
}

.pure-form-check-input:focus {
    border-color: var(--form-border-color-focus);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(75, 85, 99, 0.1);
}

.pure-form-check-input:checked {
    background-color: #4b5563;
    border-color: #4b5563;
}

.pure-form-check-input:checked[type="checkbox"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3e%3cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3e%3c/svg%3e");
}

.pure-form-check-input:checked[type="radio"] {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='white'/%3e%3c/svg%3e");
}

.pure-form-check-label {
    color: #374151;
    cursor: pointer;
}

/* Form Labels */
.pure-form-label {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #374151;
    font-size: 0.875rem;
}

.pure-form-label-sm {
    font-size: 0.75rem;
}

.pure-form-label-lg {
    font-size: 1rem;
}

/* Select Dropdowns */
.pure-form-select {
    display: block;
    width: 100%;
    padding: var(--form-padding-vertical) var(--form-padding-horizontal);
    padding-right: 2.5rem;
    font-family: inherit;
    font-size: var(--form-font-size);
    font-weight: 400;
    line-height: var(--form-line-height);
    color: #374151;
    background-color: #ffffff;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23374151' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    border: 1px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
    transition: var(--form-transition);
    appearance: none;
}

.pure-form-select:focus {
    border-color: var(--form-border-color-focus);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(75, 85, 99, 0.1);
}

.pure-form-select:disabled {
    background-color: #f9fafb;
    cursor: not-allowed;
}

/* Text Areas */
.pure-form-textarea {
    display: block;
    width: 100%;
    padding: var(--form-padding-vertical) var(--form-padding-horizontal);
    font-family: inherit;
    font-size: var(--form-font-size);
    font-weight: 400;
    line-height: var(--form-line-height);
    color: #374151;
    background-color: #ffffff;
    border: 1px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
    transition: var(--form-transition);
    resize: vertical;
    min-height: 100px;
}

.pure-form-textarea:focus {
    border-color: var(--form-border-color-focus);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(75, 85, 99, 0.1);
}

/* Button Base Styles */
.pure-btn {
    display: inline-block;
    padding: var(--button-padding-vertical) var(--button-padding-horizontal);
    margin-bottom: 0;
    font-family: inherit;
    font-size: var(--button-font-size);
    font-weight: var(--button-font-weight);
    line-height: var(--button-line-height);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    background-image: none;
    border: 1px solid transparent;
    border-radius: var(--button-border-radius);
    white-space: nowrap;
    user-select: none;
    transition: var(--button-transition);
    position: relative;
    overflow: hidden;
}

.pure-btn:focus,
.pure-btn:active:focus {
    outline: 0;
    box-shadow: 0 0 0 3px rgba(75, 85, 99, 0.25);
}

.pure-btn:hover,
.pure-btn:focus {
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
}

.pure-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12);
}

.pure-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Button Variants */
.pure-btn-primary {
    color: #ffffff;
    background-color: #4b5563;
    border-color: #4b5563;
}

.pure-btn-primary:hover,
.pure-btn-primary:focus {
    color: #ffffff;
    background-color: #374151;
    border-color: #374151;
}

.pure-btn-primary:active {
    color: #ffffff;
    background-color: #1f2937;
    border-color: #1f2937;
}

.pure-btn-secondary {
    color: #ffffff;
    background-color: #6b7280;
    border-color: #6b7280;
}

.pure-btn-secondary:hover,
.pure-btn-secondary:focus {
    color: #ffffff;
    background-color: #4b5563;
    border-color: #4b5563;
}

.pure-btn-secondary:active {
    color: #ffffff;
    background-color: #374151;
    border-color: #374151;
}

.pure-btn-success {
    color: #ffffff;
    background-color: #10b981;
    border-color: #10b981;
}

.pure-btn-success:hover,
.pure-btn-success:focus {
    color: #ffffff;
    background-color: #059669;
    border-color: #059669;
}

.pure-btn-danger {
    color: #ffffff;
    background-color: #ef4444;
    border-color: #ef4444;
}

.pure-btn-danger:hover,
.pure-btn-danger:focus {
    color: #ffffff;
    background-color: #dc2626;
    border-color: #dc2626;
}

.pure-btn-warning {
    color: #ffffff;
    background-color: #f59e0b;
    border-color: #f59e0b;
}

.pure-btn-warning:hover,
.pure-btn-warning:focus {
    color: #ffffff;
    background-color: #d97706;
    border-color: #d97706;
}

.pure-btn-info {
    color: #ffffff;
    background-color: #3b82f6;
    border-color: #3b82f6;
}

.pure-btn-info:hover,
.pure-btn-info:focus {
    color: #ffffff;
    background-color: #2563eb;
    border-color: #2563eb;
}

.pure-btn-light {
    color: #374151;
    background-color: #f9fafb;
    border-color: #f9fafb;
}

.pure-btn-light:hover,
.pure-btn-light:focus {
    color: #374151;
    background-color: #f3f4f6;
    border-color: #f3f4f6;
}

.pure-btn-dark {
    color: #ffffff;
    background-color: #1f2937;
    border-color: #1f2937;
}

.pure-btn-dark:hover,
.pure-btn-dark:focus {
    color: #ffffff;
    background-color: #111827;
    border-color: #111827;
}

/* Outline Button Variants */
.pure-btn-outline-primary {
    color: #4b5563;
    background-color: transparent;
    border-color: #4b5563;
}

.pure-btn-outline-primary:hover,
.pure-btn-outline-primary:focus {
    color: #ffffff;
    background-color: #4b5563;
    border-color: #4b5563;
}

.pure-btn-outline-secondary {
    color: #6b7280;
    background-color: transparent;
    border-color: #6b7280;
}

.pure-btn-outline-secondary:hover,
.pure-btn-outline-secondary:focus {
    color: #ffffff;
    background-color: #6b7280;
    border-color: #6b7280;
}

/* Button Sizes */
.pure-btn-sm {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 4px;
}

.pure-btn-lg {
    padding: 1rem 1.5rem;
    font-size: 1rem;
    border-radius: 8px;
}

/* Link Buttons */
.pure-btn-link {
    color: #4b5563;
    background-color: transparent;
    border-color: transparent;
    text-decoration: underline;
}

.pure-btn-link:hover,
.pure-btn-link:focus {
    color: #374151;
    text-decoration: underline;
    background-color: transparent;
    border-color: transparent;
    transform: none;
    box-shadow: none;
}

.pure-btn-link:disabled {
    color: #9ca3af;
    text-decoration: none;
}

/* Button Groups */
.pure-btn-group {
    position: relative;
    display: inline-flex;
    vertical-align: middle;
}

.pure-btn-group > .pure-btn {
    position: relative;
    flex: 1 1 auto;
}

.pure-btn-group > .pure-btn:not(:first-child) {
    margin-left: -1px;
}

.pure-btn-group > .pure-btn:not(:last-child):not(.dropdown-toggle) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.pure-btn-group > .pure-btn:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.pure-btn-group > .pure-btn:focus,
.pure-btn-group > .pure-btn:active,
.pure-btn-group > .pure-btn:hover {
    z-index: 1;
}

/* Block Buttons */
.pure-btn-block {
    display: block;
    width: 100%;
}

.pure-btn-block + .pure-btn-block {
    margin-top: 0.5rem;
}

/* Form Validation States */
.pure-form-control.is-valid {
    border-color: #10b981;
    padding-right: 2.25rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2310b981' d='m2.3 6.73.69-.69L4.7 4.34 6.4 6.03l.69-.69L4.7 2.96z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem 1rem;
}

.pure-form-control.is-valid:focus {
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.pure-form-control.is-invalid {
    border-color: #ef4444;
    padding-right: 2.25rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23ef4444'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m6 3v4'/%3e%3cpath d='m6 8.5h.01'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem 1rem;
}

.pure-form-control.is-invalid:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.25);
}

/* Form Feedback */
.valid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: #10b981;
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: #ef4444;
}

.pure-form-control.is-valid ~ .valid-feedback,
.pure-form-control.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Form Help Text */
.pure-form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: #6b7280;
}

/* Floating Labels */
.pure-form-floating {
    position: relative;
}

.pure-form-floating > .pure-form-control {
    height: 3.5rem;
    padding: 1rem 0.75rem 0.25rem;
}

.pure-form-floating > label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: 1rem 0.75rem;
    pointer-events: none;
    border: 1px solid transparent;
    transform-origin: 0 0;
    transition: opacity 0.1s ease-in-out, transform 0.1s ease-in-out;
}

.pure-form-floating > .pure-form-control:focus ~ label,
.pure-form-floating > .pure-form-control:not(:placeholder-shown) ~ label {
    opacity: 0.65;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

/* Responsive Form Utilities */
@media (max-width: 768px) {
    .pure-btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    
    .pure-form-control {
        padding: 0.625rem 0.875rem;
        font-size: 0.875rem;
    }
    
    .pure-btn-group {
        display: flex;
        flex-direction: column;
    }
    
    .pure-btn-group > .pure-btn {
        margin-left: 0;
        margin-bottom: -1px;
        border-radius: var(--button-border-radius) !important;
    }
}

/* Custom File Input */
.pure-form-file {
    position: relative;
    display: inline-block;
    width: 100%;
}

.pure-form-file-input {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 2.5rem;
    margin: 0;
    opacity: 0;
    overflow: hidden;
}

.pure-form-file-label {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1;
    height: 2.5rem;
    padding: 0.375rem 0.75rem;
    overflow: hidden;
    font-weight: 400;
    line-height: 1.5;
    color: #374151;
    background-color: #ffffff;
    border: 1px solid var(--form-border-color);
    border-radius: var(--form-border-radius);
}

.pure-form-file-label::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 3;
    display: block;
    height: 2.375rem;
    padding: 0.375rem 0.75rem;
    line-height: 1.5;
    color: #374151;
    content: "Browse";
    background-color: #f9fafb;
    border-left: inherit;
    border-radius: 0 var(--form-border-radius) var(--form-border-radius) 0;
}