/**
 * Modern Design System for Memorial Editor
 * Based on comprehensive design spec
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
    /* Primary Colors */
    --color-primary: #3B82F6;
    --color-success: #10B981;
    --color-error: #EF4444;
    --color-warning: #F59E0B;
    
    /* Neutral Colors */
    --color-text-primary: #1F2937;
    --color-text-secondary: #6B7280;
    --color-border: #E5E5E5;
    --color-background: #FAFAFA;
    --color-white: #FFFFFF;
    
    /* Memorial Accent Colors */
    --color-accent-purple: #9333EA;
    --color-accent-navy: #1E3A8A;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-h1: 32px;
    --font-size-h2: 24px;
    --font-size-h3: 20px;
    --font-size-body: 16px;
    --font-size-small: 14px;
    --font-size-caption: 12px;
    
    /* Spacing (8px grid) */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.06);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
    
    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-base: 1;
    --z-header: 100;
    --z-modal: 1000;
    --z-notification: 9999;
}

/* ============================================
   ENHANCED SAVE STATUS INDICATOR
   ============================================ */

.save-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-small);
    font-weight: 500;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.save-indicator i {
    font-size: 14px;
}

/* Pending state */
.save-indicator.pending {
    background: #FEF3C7;
    color: #92400E;
}

.save-indicator.pending i {
    animation: pulse 2s infinite;
}

/* Saving state */
.save-indicator.saving {
    background: #DBEAFE;
    color: #1E40AF;
}

.save-indicator.saving i {
    animation: spin 1.5s linear infinite;
}

/* Saved state */
.save-indicator.saved {
    background: #D1FAE5;
    color: #065F46;
}

/* Retrying state */
.save-indicator.retrying {
    background: #FEF3C7;
    color: #92400E;
}

.save-indicator.retrying i {
    animation: spin 1s linear infinite;
}

/* Failed state */
.save-indicator.failed {
    background: #FEE2E2;
    color: #991B1B;
    cursor: pointer;
    user-select: none;
}

.save-indicator.failed:hover {
    background: #FECACA;
}

.save-indicator.failed:active {
    transform: scale(0.98);
}

/* ============================================
   PDF PROGRESS COMPONENTS
   ============================================ */

.pdf-progress-wrapper {
    text-align: center;
    padding: var(--spacing-lg);
}

.pdf-progress-circle {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.pdf-progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.pdf-status-message {
    font-size: var(--font-size-body);
    color: var(--color-text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.pdf-estimated-time {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.progress-ring {
    transition: stroke-dashoffset var(--transition-base);
}

/* ============================================
   STEPPER COMPONENT
   ============================================ */

.stepper-container {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    padding: var(--spacing-md);
}

.stepper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.stepper-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: var(--z-base);
}

/* Step connector line */
.stepper-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    width: 100%;
    height: 2px;
    background: var(--color-border);
    z-index: -1;
}

.stepper-step.completed:not(:last-child)::after {
    background: var(--color-success);
}

/* Step circle */
.stepper-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-center;
    font-weight: 600;
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

/* Future step */
.stepper-step.future .stepper-circle {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    color: var(--color-text-secondary);
}

/* Completed step */
.stepper-step.completed .stepper-circle {
    background: var(--color-success);
    border: 2px solid var(--color-success);
    color: var(--color-white);
}

.stepper-step.completed .stepper-circle i {
    font-size: 20px;
}

/* Current step */
.stepper-step.current .stepper-circle {
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
    color: var(--color-white);
    animation: pulse-step 2s infinite;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

/* Step label */
.stepper-label {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    text-align: center;
    margin-top: var(--spacing-xs);
    max-width: 120px;
}

.stepper-step.current .stepper-label {
    color: var(--color-primary);
    font-weight: 600;
}

.stepper-step.completed .stepper-label {
    color: var(--color-success);
    font-weight: 500;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes pulse-step {
    0%, 100% {
        box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(59, 130, 246, 0.1);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   SUCCESS & ERROR MESSAGES
   ============================================ */

.success-message,
.error-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.success-message {
    background: #D1FAE5;
    border: 1px solid #10B981;
}

.success-message i {
    color: #10B981;
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.success-message strong {
    display: block;
    color: #065F46;
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-sm);
}

.success-message p {
    color: #047857;
    margin: var(--spacing-xs) 0;
}

.success-message p.small {
    font-size: var(--font-size-small);
    color: #059669;
}

.error-message {
    background: #FEE2E2;
    border: 1px solid #EF4444;
}

.error-message i {
    color: #EF4444;
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.error-message strong {
    display: block;
    color: #991B1B;
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-sm);
}

.error-message p {
    color: #B91C1C;
    margin: var(--spacing-xs) 0;
}

/* ============================================
   PDF VALIDATION STATUS
   ============================================ */

.validation-progress {
    text-align: center;
    padding: var(--spacing-lg);
}

.validation-progress .spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--spacing-sm);
    border: 4px solid #E5E7EB;
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.validation-progress p {
    margin: var(--spacing-xs) 0;
    color: var(--color-text-primary);
}

.validation-progress p.small {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.validation-success {
    text-align: center;
}

.validation-success i {
    color: var(--color-success);
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.validation-success-icon {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.validation-details {
    background: #FEF3C7;
    border: 1px solid #F59E0B;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    text-align: left;
}

.validation-details ul {
    list-style: disc;
    padding-left: var(--spacing-md);
    margin: var(--spacing-xs) 0;
}

.validation-details li {
    margin: var(--spacing-xs) 0;
    color: #92400E;
    font-size: var(--font-size-small);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   SHIPPING OPTIONS
   ============================================ */

.loading-shipping-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--color-text-secondary);
}

.loading-shipping-options .spinner {
    width: 20px;
    height: 20px;
    border: 2px solid #E5E7EB;
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.shipping-option {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.shipping-option:hover {
    border-color: var(--color-primary);
    background: #F9FAFB;
}

.shipping-option input[type="radio"] {
    margin-top: 4px;
    cursor: pointer;
}

.shipping-option label {
    flex: 1;
    cursor: pointer;
    margin-left: var(--spacing-sm);
    margin-bottom: 0;
}

.shipping-option input[type="radio"]:checked + label {
    color: var(--color-primary);
    font-weight: 600;
}

.shipping-option input[type="radio"]:checked ~ label {
    color: var(--color-primary);
}

.shipping-option-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.shipping-option-info strong {
    display: block;
    font-size: var(--font-size-body);
    color: var(--color-text-primary);
}

.shipping-description {
    display: block;
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.form-hint {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    font-style: italic;
}

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

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

/* Focus visible styles */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Skip to main content link */
.skip-to-main {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
    z-index: var(--z-notification);
}

.skip-to-main:focus {
    position: fixed;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    width: auto;
    height: auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

/* Minimum touch target size */
button,
a,
.clickable {
    min-width: 44px;
    min-height: 44px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

/* Mobile: 0-639px */
@media (max-width: 639px) {
    :root {
        --font-size-h1: 24px;
        --font-size-h2: 20px;
        --font-size-h3: 18px;
    }
    
    .stepper {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stepper-step:not(:last-child)::after {
        display: none;
    }
    
    .stepper-circle {
        width: 36px;
        height: 36px;
    }
    
    .stepper-label {
        max-width: 100%;
    }
}

/* Tablet: 640px-1023px */
@media (min-width: 640px) and (max-width: 1023px) {
    .stepper-circle {
        width: 38px;
        height: 38px;
    }
}

/* Desktop: 1024px+ */
@media (min-width: 1024px) {
    /* Full desktop styles already defined */
}

/* ============================================
   LOADING STATES
   ============================================ */

.loading-skeleton {
    background: linear-gradient(
        90deg,
        #E5E7EB 25%,
        #F3F4F6 50%,
        #E5E7EB 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

.bg-primary { background-color: var(--color-primary); }
.bg-success { background-color: var(--color-success); }
.bg-error { background-color: var(--color-error); }
.bg-white { background-color: var(--color-white); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --shadow-sm: none;
        --shadow-md: none;
        --shadow-lg: none;
    }
    
    .stepper-circle {
        border-width: 3px;
    }
}