/* 2026 Design System: Glassmorphism, Dark Mode First, Microinteractions */

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary, #6366f1);
    color: #fff;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.2s;
    font-size: 14px;
    border-radius: 0 0 4px 0;
}
.skip-link:focus {
    top: 0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #e74c3c;
    --color-bg-dark: #0f0f23;
    --color-bg-secondary: #1a1a3e;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0d4;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-glass-bg: rgba(255, 255, 255, 0.05);
    --color-success: #27ae60;
    --color-warning: #f39c12;
    --color-error: #e74c3c;
}

/* Light Theme */
[data-theme="light"] {
    --color-bg-dark: #f5f5fa;
    --color-bg-secondary: #ffffff;
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #5a5a70;
    --color-border: rgba(231, 76, 60, 0.1);
    --color-glass-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="light"] body {
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
}

/* App Loader */
.app-loader {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--color-bg-dark, #0f0f23);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s;
}
.app-loader.hidden {
    opacity: 0;
    pointer-events: none;
}
.loader-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: #e74c3c;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.3);

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #c0392b;
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: white;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Language Selector */
.language-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.lang-toggle {
    background: var(--color-glass-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.lang-menu {
    position: absolute;
    top: 50px;
    right: 0;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    min-width: 150px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
}

.lang-menu.hidden {
    display: none;
}

.lang-option {
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    padding: 10px 12px;
    cursor: pointer;
    text-align: left;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    font-size: 14px;
}

.lang-option:hover {
    background: rgba(231, 76, 60, 0.2);
}

/* Header */
.header {
    padding: 40px 0 20px;
    text-align: center;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.1), rgba(149, 165, 166, 0.05));
    border-radius: var(--radius-lg);
    margin-top: 60px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(231, 76, 60, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}

.title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px 0;
}

.screen {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screen-content {
    background: var(--color-glass-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.screen-content h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.screen-content > p {
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    font-size: 16px;
}

/* Blood Type Grid */
.blood-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.blood-type-btn {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.2), rgba(231, 76, 60, 0.05));
    border: 2px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 24px 16px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.blood-type-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 30%, rgba(231, 76, 60, 0.3), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.blood-type-btn:hover::before {
    opacity: 1;
}

.blood-type-btn:hover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.3), rgba(231, 76, 60, 0.1));
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.blood-type-btn:active {
    transform: translateY(-2px);
}

/* CTA pulse animation on blood type selection buttons */
@keyframes blood-btn-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(231, 76, 60, 0); }
}
.blood-type-btn {
    animation: blood-btn-pulse 2.5s ease-in-out infinite;
}
.blood-type-btn:nth-child(2) { animation-delay: 0.3s; }
.blood-type-btn:nth-child(3) { animation-delay: 0.6s; }
.blood-type-btn:nth-child(4) { animation-delay: 0.9s; }
@media (prefers-reduced-motion: reduce) {
    .blood-type-btn { animation: none !important; }
}

.blood-drop {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 24px;
    transform-origin: center;
    animation: dropPulse 2s ease-in-out infinite;
}

.blood-type-btn:hover .blood-drop {
    animation: dropPulse 1s ease-in-out infinite;
}

@keyframes dropPulse {
    0%, 100% { transform: rotate(-45deg) scale(1); }
    50% { transform: rotate(-45deg) scale(1.1); }
}

.blood-type-label {
    font-size: 14px;
    font-weight: 600;
}

/* Result Section */
.result-header {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.1), rgba(149, 165, 166, 0.05));
    border-radius: var(--radius-lg);
}

.result-blood-drop {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 32px;
    margin: 0 auto 16px;
    color: white;
}

#result-title {
    font-size: 32px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-summary {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.back-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 20px;
    font-size: 14px;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-primary);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding: 8px 0;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    min-height: 44px;
    font-size: 14px;
    font-weight: 500;
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.tab-content.active {
    display: block;
}

/* Traits */
.traits-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.trait-group {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
}

.trait-group:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(231, 76, 60, 0.3);
    transform: translateY(-2px);
}

.trait-group h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--color-primary);
    font-weight: 600;
}

.trait-group ul {
    list-style: none;
}

.trait-group li {
    padding: 8px 0;
    color: var(--color-text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.trait-group li::before {
    content: '▸';
    color: var(--color-primary);
    font-weight: 700;
}

.trait-group p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    font-size: 14px;
}

/* Compatibility Chart */
.compatibility-chart {
    display: grid;
    grid-template-columns: auto repeat(4, 1fr);
    gap: 8px;
    margin: 24px 0;
    font-size: 12px;
}

.compatibility-header {
    background: var(--color-primary);
    color: white;
    padding: 8px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
}

.compatibility-row {
    background: var(--color-primary);
    color: white;
    padding: 8px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
}

.compatibility-cell {
    background: rgba(231, 76, 60, 0.2);
    padding: 8px;
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--color-border);
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.compatibility-cell:hover {
    background: rgba(231, 76, 60, 0.3);
    transform: scale(1.05);
}

.chart-legend {
    color: var(--color-text-secondary);
    font-size: 12px;
    text-align: center;
    margin-top: 16px;
}

/* Famous People */
.famous-people {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.famous-person {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
    transition: var(--transition);
}

.famous-person:hover {
    background: rgba(231, 76, 60, 0.15);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.famous-person .emoji {
    font-size: 32px;
    margin-bottom: 8px;
}

.famous-person .name {
    font-weight: 600;
    font-size: 14px;
    color: var(--color-text-primary);
}

.famous-person .title {
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* Wellness Info */
.wellness-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.wellness-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
}

.wellness-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.wellness-item h4 {
    color: var(--color-primary);
    margin-bottom: 8px;
    font-size: 16px;
}

.wellness-item p {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.disclaimer {
    background: rgba(243, 156, 18, 0.1);
    border-left: 3px solid var(--color-warning);
    padding: 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 20px;
}

/* Distribution */
.distribution-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.distribution-item {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
}

.distribution-item .type {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.distribution-item .bar {
    width: 100%;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.distribution-item .fill {
    height: 100%;
    background: linear-gradient(90deg, #e74c3c, #c0392b);
    border-radius: 10px;
    transition: width 0.8s ease-out;
}

.distribution-item .percentage {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Share Section */
.share-section {
    padding: 24px;
    background: var(--color-glass-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    margin: 24px 0;
}

.share-section h3 {
    margin-bottom: 16px;
}

.share-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.share-btn {
    background: linear-gradient(135deg, var(--color-primary), #c0392b);
    border: none;
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

/* Ad Containers */
.ad-container {
    background: var(--color-glass-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 16px 0;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-top {
    margin-top: 20px;
}

.ad-bottom {
    margin-bottom: 20px;
}

/* Premium Button */
.premium-btn {
    background: linear-gradient(135deg, var(--color-primary), #c0392b);
    border: none;
    color: white;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    width: 100%;
    margin-top: 20px;
    min-height: 44px;
    font-size: 16px;
}

.premium-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.premium-btn:active {
    transform: scale(0.98);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 16px;
    animation: fadeIn 0.3s ease-out;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 400px;
    width: 100%;
    position: relative;
    backdrop-filter: blur(10px);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    font-size: 28px;
    cursor: pointer;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: 16px;
}

.modal-content p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #c0392b);
    border: none;
    color: white;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    width: 100%;
    min-height: 44px;
    font-size: 16px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Particle Canvas */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* Responsive */
@media (max-width: 768px) {
    .title {
        font-size: 28px;
    }

    .subtitle {
        font-size: 14px;
    }

    .screen-content {
        padding: 24px 16px;
    }

    .screen-content h2 {
        font-size: 24px;
    }

    .blood-type-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tabs {
        flex-wrap: wrap;
    }

    .traits-container {
        grid-template-columns: 1fr;
    }

    .compatibility-chart {
        font-size: 11px;
    }

    .famous-people {
        grid-template-columns: repeat(2, 1fr);
    }

    .modal-content {
        padding: 24px;
    }

    .header {
        margin-top: 80px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    .title {
        font-size: 22px;
    }

    .subtitle {
        font-size: 12px;
    }

    .screen-content {
        padding: 16px 12px;
        border-radius: var(--radius-md);
    }

    .screen-content h2 {
        font-size: 20px;
    }

    .blood-type-grid {
        gap: 12px;
    }

    .blood-type-btn {
        padding: 16px 12px;
    }

    .blood-drop {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    .tab-btn {
        padding: 8px 12px;
        font-size: 12px;
    }

    .traits-container {
        gap: 16px;
    }

    .trait-group {
        padding: 16px;
    }

    .famous-people {
        grid-template-columns: 1fr;
    }

    .share-buttons {
        flex-direction: column;
    }

    .share-btn {
        width: 100%;
        justify-content: center;
    }

    .language-selector {
        top: 10px;
        right: 10px;
    }

    .lang-toggle {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .language-selector,
    .ad-container,
    .back-btn,
    .tabs,
    .share-section,
    #particle-canvas {
        display: none !important;
    }

    .screen-content {
        background: white;
        border: 1px solid #ddd;
        box-shadow: none;
    }
}