/* ================================
   CSS Variables & Reset
================================ */
:root {
    /* Light Theme Colors */
    --bg-primary: #FDFBF7;
    --bg-secondary: #F5F0E8;
    --bg-card: #FFFFFF;
    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --text-muted: #A0A8AB;
    --primary: #6A4C93;
    --primary-light: #8B6AAF;
    --primary-dark: #4A3466;
    --secondary: #FF9F1C;
    --secondary-light: #FFB74D;
    --accent: #E8D5F2;
    --success: #00B894;
    --success-light: #55EFC4;
    --warning: #FDCB6E;
    --danger: #E17055;
    --danger-light: #FAB1A0;
    --border: #E8E4DE;
    --shadow: rgba(106, 76, 147, 0.1);
    --shadow-strong: rgba(106, 76, 147, 0.2);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Typography */
    --font-heading: 'Georgia', 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1A1A2E;
    --bg-secondary: #16213E;
    --bg-card: #0F0F23;
    --text-primary: #E8E8E8;
    --text-secondary: #B8B8C8;
    --text-muted: #6C6C7E;
    --primary: #9B7BC7;
    --primary-light: #B89FD6;
    --primary-dark: #6A4C93;
    --accent: #2D2D4A;
    --border: #2D2D4A;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-strong: rgba(0, 0, 0, 0.5);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ================================
   Layout
================================ */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl);
    width: 100%;
}

/* ================================
   Header
================================ */
.header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--primary);
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.privacy-badge {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--success);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.privacy-badge .shield-icon {
    width: 16px;
    height: 16px;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--accent);
    transform: scale(1.05);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

/* ================================
   Hero Section
================================ */
.hero {
    text-align: center;
    padding: var(--space-2xl) var(--space-xl);
    background: linear-gradient(135deg, var(--accent) 0%, var(--bg-primary) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-xl);
}

.hero h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--space-md);
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ================================
   Form Styles
================================ */
.compatibility-form {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: 0 4px 20px var(--shadow);
}

.partners-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.partner-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.partner-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px var(--shadow);
}

.partner-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.partner-avatar {
    width: 50px;
    height: 50px;
    background: var(--primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-avatar svg {
    width: 28px;
    height: 28px;
    color: white;
}

.partner-header h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
}

.heart-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
}

.heart-connector svg {
    width: 48px;
    height: 48px;
    color: var(--danger);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-body);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--accent);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

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

.error-message {
    display: block;
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: var(--space-xs);
    min-height: 1.2rem;
}

.form-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.btn-calculate {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 15px var(--shadow-strong);
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-strong);
}

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

.btn-calculate svg {
    width: 20px;
    height: 20px;
}

.btn-clear {
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-clear:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* ================================
   Results Section
================================ */
.results-section {
    margin-top: var(--space-2xl);
    animation: fadeInUp 0.6s ease;
}

.results-section.hidden {
    display: none;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.results-header h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--primary);
}

.btn-recalculate {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-recalculate:hover {
    background: var(--accent);
    border-color: var(--primary);
}

.btn-recalculate svg {
    width: 18px;
    height: 18px;
}

/* Overall Score Circle */
.overall-score-container {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px var(--shadow);
    margin-bottom: var(--space-xl);
}

.score-circle {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--space-lg);
}

.progress-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--bg-secondary);
    stroke-width: 12;
}

.progress-ring-fill {
    fill: none;
    stroke: url(#gradient);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 565.48;
    transition: stroke-dashoffset 1.5s ease-out;
}

.score-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.score-value {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.score-label {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.score-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: var(--space-sm);
}

.score-summary {
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* Partner Numbers Comparison */
.numbers-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.partner-numbers {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 4px 20px var(--shadow);
}

.partner-numbers h4 {
    font-family: var(--font-heading);
    color: var(--primary);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.numbers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--space-md);
}

.number-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: transform var(--transition-fast);
}

.number-card:hover {
    transform: scale(1.05);
}

.number-card .number-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.number-card .number-value.master {
    color: var(--secondary);
}

.number-card .number-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Dimensions Grid */
.dimensions-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: 0 4px 20px var(--shadow);
    margin-bottom: var(--space-xl);
}

.dimensions-section h3 {
    font-family: var(--font-heading);
    color: var(--primary);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.dimensions-grid {
    display: grid;
    gap: var(--space-md);
}

.dimension-item {
    display: grid;
    grid-template-columns: 140px 1fr 60px;
    align-items: center;
    gap: var(--space-md);
}

.dimension-label {
    font-weight: 600;
    color: var(--text-primary);
}

.dimension-bar {
    height: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.dimension-fill {
    height: 100%;
    border-radius: var(--radius-sm);
    transition: width 1s ease-out;
}

.dimension-fill.high {
    background: linear-gradient(90deg, var(--success) 0%, var(--success-light) 100%);
}

.dimension-fill.medium {
    background: linear-gradient(90deg, var(--warning) 0%, var(--secondary-light) 100%);
}

.dimension-fill.low {
    background: linear-gradient(90deg, var(--danger) 0%, var(--danger-light) 100%);
}

.dimension-score {
    font-weight: 700;
    color: var(--text-primary);
    text-align: right;
}

/* Insights Section */
.insights-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.insight-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: 0 4px 20px var(--shadow);
}

.insight-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.insight-header svg {
    width: 24px;
    height: 24px;
}

.insight-card.strengths .insight-header svg {
    color: var(--success);
}

.insight-card.challenges .insight-header svg {
    color: var(--warning);
}

.insight-header h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
}

.insight-card ul {
    list-style: none;
}

.insight-card li {
    padding: var(--space-sm) 0;
    padding-left: var(--space-lg);
    position: relative;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.insight-card li:last-child {
    border-bottom: none;
}

.insight-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.insight-card.strengths li::before {
    background: var(--success);
}

.insight-card.challenges li::before {
    background: var(--warning);
}

/* Advice Section */
.advice-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    color: white;
}

.advice-section h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
    text-align: center;
}

.advice-content {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.advice-content p {
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.advice-content p:last-child {
    margin-bottom: 0;
}

.advice-tip {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    margin-top: var(--space-md);
}

.advice-tip-icon {
    font-size: 1.5rem;
    line-height: 1;
}

/* ================================
   Footer
================================ */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl);
    text-align: center;
}

.privacy-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.privacy-notice svg {
    width: 24px;
    height: 24px;
    color: var(--success);
    flex-shrink: 0;
}

.privacy-notice p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: left;
}

.disclaimer {
    padding: var(--space-md);
    margin-bottom: var(--space-md);
}

.disclaimer p {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ================================
   Responsive Design
================================ */
@media (max-width: 968px) {
    .partners-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .heart-connector {
        padding: var(--space-md) 0;
        order: 0;
    }

    .partner-card[data-partner="1"] {
        order: -1;
    }

    .numbers-comparison {
        grid-template-columns: 1fr;
    }

    .insights-section {
        grid-template-columns: 1fr;
    }

    .dimension-item {
        grid-template-columns: 100px 1fr 50px;
    }
}

@media (max-width: 640px) {
    .header-content {
        padding: var(--space-sm) var(--space-md);
    }

    .privacy-badge span {
        display: none;
    }

    .logo h1 {
        font-size: 1.25rem;
    }

    .hero {
        padding: var(--space-xl) var(--space-md);
    }

    .hero h2 {
        font-size: 1.75rem;
    }

    .main-content {
        padding: var(--space-md);
    }

    .compatibility-form {
        padding: var(--space-lg);
    }

    .partner-card {
        padding: var(--space-lg);
    }

    .form-actions {
        flex-direction: column;
    }

    .btn-calculate, .btn-clear {
        width: 100%;
        justify-content: center;
    }

    .results-header {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .dimension-item {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }

    .dimension-bar {
        order: 1;
    }

    .dimension-score {
        text-align: left;
    }

    .privacy-notice {
        flex-direction: column;
        text-align: center;
    }

    .privacy-notice p {
        text-align: center;
    }
}

/* ================================
   Utility Classes
================================ */
.hidden {
    display: none !important;
}

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

/* Focus States for Accessibility */
button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header, .footer, .form-actions, .btn-recalculate {
        display: none;
    }

    .results-section {
        margin-top: 0;
    }

    .app-container {
        background: white;
    }
}