/**
 * COMPONENTS.CSS - UI Components (Buttons, Cards, Forms, etc.)
 * Reusable interface components that work across contexts
 * 
 * @package StileSalentino
 * @version 2.1.0
 */

/* =============================================================
   BUTTON SYSTEM
   ============================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--btn-gap, 8px);
    padding: var(--btn-padding-y, 12px) var(--btn-padding-x, 20px);
    font-size: var(--btn-font-size, 0.875rem);
    font-weight: var(--btn-font-weight, 500);
    line-height: 1;
    border: var(--btn-border-width, 1px) solid transparent;
    border-radius: var(--btn-border-radius, 6px);
    background: var(--btn-bg, transparent);
    color: var(--btn-color, currentColor);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    vertical-align: middle;
    user-select: none;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible {
    outline: 2px solid var(--focus-color, #2563eb);
    outline-offset: 2px;
}

.btn:disabled,
.btn.btn--disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button Variants */
.btn--primary {
    --btn-bg: var(--color-primary, #2563eb);
    --btn-color: var(--text-on-primary, #ffffff);
    --btn-border-color: var(--color-primary, #2563eb);
}

.btn--primary:hover {
    --btn-bg: var(--color-primary-dark, #1d4ed8);
    --btn-border-color: var(--color-primary-dark, #1d4ed8);
}

.btn--secondary {
    --btn-bg: var(--color-secondary, #64748b);
    --btn-color: var(--text-on-secondary, #ffffff);
    --btn-border-color: var(--color-secondary, #64748b);
}

.btn--secondary:hover {
    --btn-bg: var(--color-secondary-dark, #475569);
    --btn-border-color: var(--color-secondary-dark, #475569);
}

.btn--ghost {
    --btn-bg: transparent;
    --btn-color: var(--color-primary, #2563eb);
    --btn-border-color: var(--color-primary, #2563eb);
}

.btn--ghost:hover {
    --btn-bg: var(--color-primary, #2563eb);
    --btn-color: var(--text-on-primary, #ffffff);
}

.btn--link {
    --btn-bg: transparent;
    --btn-color: var(--link-color, #2563eb);
    --btn-border-color: transparent;
    --btn-padding-x: 0;
    --btn-padding-y: 0;
}

.btn--link:hover {
    --btn-color: var(--link-hover, #1d4ed8);
    transform: none;
    box-shadow: none;
    text-decoration: underline;
}

.btn--danger {
    --btn-bg: var(--color-danger, #dc2626);
    --btn-color: var(--text-on-danger, #ffffff);
    --btn-border-color: var(--color-danger, #dc2626);
}

.btn--danger:hover {
    --btn-bg: var(--color-danger-dark, #b91c1c);
}

.btn--success {
    --btn-bg: var(--color-success, #16a34a);
    --btn-color: var(--text-on-success, #ffffff);
    --btn-border-color: var(--color-success, #16a34a);
}

.btn--success:hover {
    --btn-bg: var(--color-success-dark, #15803d);
}

/* Button Sizes */
.btn--small {
    --btn-padding-y: 8px;
    --btn-padding-x: 12px;
    --btn-font-size: 0.75rem;
}

.btn--large {
    --btn-padding-y: 16px;
    --btn-padding-x: 32px;
    --btn-font-size: 1rem;
}

/* Button States */
.btn--full {
    width: 100%;
}

.btn--loading {
    position: relative;
    color: transparent;
}

.btn--loading .btn__spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Button Content */
.btn__icon {
    display: inline-flex;
    align-items: center;
    width: 16px;
    height: 16px;
}

.btn__icon svg {
    width: 100%;
    height: 100%;
}

.btn__text--loading {
    opacity: 0;
}

/* =============================================================
   CARD SYSTEM
   ============================================================= */

.card {
    display: flex;
    flex-direction: column;
    background: var(--card-bg, #ffffff);
    border: var(--card-border-width, 1px) solid var(--card-border-color, #e5e7eb);
    border-radius: var(--card-border-radius, 8px);
    box-shadow: var(--card-shadow, 0 1px 3px rgba(0, 0, 0, 0.1));
    padding: var(--card-padding, 20px);
    transition: all 0.2s ease-in-out;
    color: var(--card-text-color, inherit);
}

/* Card Variants */
.card--elevated {
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card--outlined {
    --card-border-width: 2px;
    --card-border-color: var(--color-primary, #2563eb);
    --card-shadow: none;
}

.card--ghost {
    --card-bg: transparent;
    --card-border-color: transparent;
    --card-shadow: none;
}

/* Card Hover Effects */
.card--hover-lift:hover {
    transform: translateY(-2px);
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.card--hover-glow:hover {
    --card-shadow: 0 0 0 1px var(--color-primary, #2563eb), 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.card--hover-scale:hover {
    transform: scale(1.02);
}

.card--hover-border:hover {
    --card-border-color: var(--color-primary, #2563eb);
}

/* Card Backgrounds */
.card--bg-primary {
    --card-bg: var(--color-primary, #2563eb);
    --card-text-color: var(--text-on-primary, #ffffff);
    --card-border-color: var(--color-primary, #2563eb);
}

.card--bg-secondary {
    --card-bg: var(--color-secondary, #64748b);
    --card-text-color: var(--text-on-secondary, #ffffff);
    --card-border-color: var(--color-secondary, #64748b);
}

.card--bg-transparent {
    --card-bg: transparent;
}

/* Card Shadow Variations */
.card--shadow-none { --card-shadow: none; }
.card--shadow-small { --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.05); }
.card--shadow-large { --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }

/* Card Border Radius */
.card--radius-none { --card-border-radius: 0; }
.card--radius-small { --card-border-radius: 4px; }
.card--radius-large { --card-border-radius: 12px; }
.card--radius-round { --card-border-radius: 50%; }

/* Card Padding */
.card--padding-none { --card-padding: 0; }
.card--padding-small { --card-padding: 12px; }
.card--padding-large { --card-padding: 32px; }

/* Clickable Cards */
.card[href],
.card--clickable {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.card[href]:hover,
.card--clickable:hover {
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* =============================================================
   BADGE SYSTEM
   ============================================================= */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--badge-gap, 4px);
    padding: var(--badge-padding-y, 4px) var(--badge-padding-x, 8px);
    font-size: var(--badge-font-size, 0.75rem);
    font-weight: var(--badge-font-weight, 500);
    line-height: 1;
    border-radius: var(--badge-border-radius, 4px);
    background: var(--badge-bg, var(--color-primary, #2563eb));
    color: var(--badge-color, var(--text-on-primary, #ffffff));
    white-space: nowrap;
}

/* Badge Variants */
.badge--primary {
    --badge-bg: var(--color-primary, #2563eb);
    --badge-color: var(--text-on-primary, #ffffff);
}

.badge--secondary {
    --badge-bg: var(--color-secondary, #64748b);
    --badge-color: var(--text-on-secondary, #ffffff);
}

.badge--success {
    --badge-bg: var(--color-success, #16a34a);
    --badge-color: var(--text-on-success, #ffffff);
}

.badge--warning {
    --badge-bg: var(--color-warning, #d97706);
    --badge-color: var(--text-on-warning, #ffffff);
}

.badge--danger {
    --badge-bg: var(--color-danger, #dc2626);
    --badge-color: var(--text-on-danger, #ffffff);
}

/* Badge Sizes */
.badge--small {
    --badge-padding-y: 2px;
    --badge-padding-x: 6px;
    --badge-font-size: 0.625rem;
}

.badge--large {
    --badge-padding-y: 6px;
    --badge-padding-x: 12px;
    --badge-font-size: 0.875rem;
}

/* Badge Styles */
.badge--square {
    --badge-border-radius: 2px;
}

.badge--outline {
    background: transparent;
    border: 1px solid var(--badge-bg, var(--color-primary, #2563eb));
    color: var(--badge-bg, var(--color-primary, #2563eb));
}

/* Badge Content */
.badge__icon {
    display: inline-flex;
    align-items: center;
    width: 12px;
    height: 12px;
}

.badge__text {
    display: inline-block;
}

/* =============================================================
   ICON SYSTEM
   ============================================================= */

.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--icon-size, 20px);
    height: var(--icon-size, 20px);
    color: var(--icon-color, currentColor);
    flex-shrink: 0;
}

.icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
    stroke: currentColor;
}

/* Icon Sizes */
.icon--small { --icon-size: 16px; }
.icon--large { --icon-size: 24px; }
.icon--xl { --icon-size: 32px; }

/* Icon Colors */
.icon--color-primary { --icon-color: var(--color-primary, #2563eb); }
.icon--color-secondary { --icon-color: var(--color-secondary, #64748b); }
.icon--color-muted { --icon-color: var(--text-muted, #9ca3af); }
.icon--color-white { --icon-color: #ffffff; }

/* =============================================================
   HEADING SYSTEM
   ============================================================= */

.heading {
    font-family: var(--font-display, system-ui, -apple-system, sans-serif);
    font-weight: var(--heading-font-weight, 600);
    line-height: var(--heading-line-height, 1.2);
    color: var(--heading-color, var(--text-primary, #111827));
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--heading-gap, 8px);
}

/* Heading Levels */
.heading--level-1 { 
    font-size: var(--font-size-4xl, 2.25rem); 
    font-weight: 700;
}
.heading--level-2 { 
    font-size: var(--font-size-3xl, 1.875rem); 
    font-weight: 600;
}
.heading--level-3 { 
    font-size: var(--font-size-2xl, 1.5rem); 
    font-weight: 600;
}
.heading--level-4 { 
    font-size: var(--font-size-xl, 1.25rem); 
    font-weight: 500;
}
.heading--level-5 { 
    font-size: var(--font-size-lg, 1.125rem); 
    font-weight: 500;
}
.heading--level-6 { 
    font-size: var(--font-size-base, 1rem); 
    font-weight: 500;
}

/* Heading Sizes (override levels) */
.heading--small { font-size: var(--font-size-lg, 1.125rem); }
.heading--large { font-size: var(--font-size-4xl, 2.25rem); }
.heading--xl { font-size: var(--font-size-5xl, 3rem); }

/* Heading Alignment */
.heading--left { text-align: left; justify-content: flex-start; }
.heading--center { text-align: center; justify-content: center; }
.heading--right { text-align: right; justify-content: flex-end; }

/* Heading Colors */
.heading--color-primary { --heading-color: var(--color-primary, #2563eb); }
.heading--color-secondary { --heading-color: var(--color-secondary, #64748b); }
.heading--color-muted { --heading-color: var(--text-muted, #9ca3af); }

/* Heading Weights */
.heading--light { font-weight: 300; }
.heading--medium { font-weight: 500; }
.heading--semibold { font-weight: 600; }
.heading--bold { font-weight: 700; }

/* Heading Decorations */
.heading--underline {
    position: relative;
}

.heading--underline::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--color-primary, #2563eb);
}

.heading--center.heading--underline::after {
    left: 50%;
    transform: translateX(-50%);
}

.heading--right.heading--underline::after {
    left: auto;
    right: 0;
}

/* Heading Bottom Margins */
.heading--mb-none { margin-bottom: 0; }
.heading--mb-small { margin-bottom: var(--space-sm, 12px); }
.heading--mb-large { margin-bottom: var(--space-xl, 32px); }

/* Heading Icons */
.heading__icon {
    display: inline-flex;
    align-items: center;
    width: 1em;
    height: 1em;
    opacity: 0.8;
}

.heading__icon--left { order: -1; }
.heading__icon--right { order: 1; }

.heading__text {
    flex: 1;
}

/* =============================================================
   TEXT COMPONENT
   ============================================================= */

.text {
    margin: 0;
    color: var(--text-color, inherit);
    font-family: var(--text-font-family, inherit);
}

/* Text Sizes */
.text--xs { font-size: var(--font-size-xs, 0.75rem); line-height: 1.4; }
.text--sm { font-size: var(--font-size-sm, 0.875rem); line-height: 1.4; }
.text--lg { font-size: var(--font-size-lg, 1.125rem); line-height: 1.5; }
.text--xl { font-size: var(--font-size-xl, 1.25rem); line-height: 1.4; }
.text--2xl { font-size: var(--font-size-2xl, 1.5rem); line-height: 1.3; }

/* Text Weights */
.text--light { font-weight: 300; }
.text--medium { font-weight: 500; }
.text--semibold { font-weight: 600; }
.text--bold { font-weight: 700; }

/* Text Colors */
.text--color-primary { --text-color: var(--color-primary, #2563eb); }
.text--color-secondary { --text-color: var(--color-secondary, #64748b); }
.text--color-muted { --text-color: var(--text-muted, #9ca3af); }
.text--color-white { --text-color: #ffffff; }

/* Text Alignment */
.text--left { text-align: left; }
.text--center { text-align: center; }
.text--right { text-align: right; }
.text--justify { text-align: justify; }

/* Text Line Heights */
.text--lh-tight { line-height: 1.2; }
.text--lh-relaxed { line-height: 1.7; }
.text--lh-loose { line-height: 2; }

/* Text Styles */
.text--italic { font-style: italic; }
.text--uppercase { text-transform: uppercase; }

/* Text Bottom Margins */
.text--mb-none { margin-bottom: 0; }
.text--mb-small { margin-bottom: var(--space-sm, 12px); }
.text--mb-large { margin-bottom: var(--space-xl, 32px); }

/* =============================================================
   FORM COMPONENTS
   ============================================================= */

.form-group {
    margin-bottom: var(--form-group-margin, 20px);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary, #111827);
    margin-bottom: var(--form-label-margin, 6px);
    font-size: var(--form-label-size, 0.875rem);
}

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: var(--form-input-padding-y, 10px) var(--form-input-padding-x, 12px);
    font-size: var(--form-input-font-size, 0.875rem);
    line-height: 1.5;
    color: var(--form-input-color, #111827);
    background: var(--form-input-bg, #ffffff);
    border: var(--form-input-border-width, 1px) solid var(--form-input-border-color, #d1d5db);
    border-radius: var(--form-input-border-radius, 6px);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted, #9ca3af);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

/* Form States */
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background: var(--form-disabled-bg, #f9fafb);
    color: var(--text-muted, #9ca3af);
    cursor: not-allowed;
}

.form-input--error,
.form-select--error,
.form-textarea--error {
    border-color: var(--color-danger, #dc2626);
}

.form-input--error:focus,
.form-select--error:focus,
.form-textarea--error:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-help {
    display: block;
    margin-top: var(--form-help-margin, 4px);
    font-size: var(--form-help-size, 0.75rem);
    color: var(--text-muted, #9ca3af);
}

.form-error {
    display: block;
    margin-top: var(--form-error-margin, 4px);
    font-size: var(--form-error-size, 0.75rem);
    color: var(--color-danger, #dc2626);
}

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

@media (max-width: 768px) {
    .btn {
        --btn-padding-x: 16px;
        --btn-font-size: 0.875rem;
    }
    
    .btn--large {
        --btn-padding-y: 14px;
        --btn-padding-x: 24px;
    }
    
    .card {
        --card-padding: 16px;
    }
    
    .heading--level-1 { font-size: var(--font-size-3xl, 1.875rem); }
    .heading--level-2 { font-size: var(--font-size-2xl, 1.5rem); }
    .heading--xl { font-size: var(--font-size-4xl, 2.25rem); }
    
    .form-input,
    .form-select,
    .form-textarea {
        --form-input-padding-y: 12px;
        --form-input-font-size: 1rem; /* Prevent zoom on iOS */
    }
}

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

@media print {
    .btn,
    .badge {
        background: transparent !important;
        color: black !important;
        border: 1px solid black !important;
    }
    
    .card {
        border: 1px solid black !important;
        box-shadow: none !important;
    }
}