/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Roboto+Mono:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Product+Sans:wght@400;500;700&display=swap');

:root {
    /* Google Brand Colors */
    --google-blue: #4285F4;
    --google-red: #EA4335;
    --google-yellow: #FBBC04;
    --google-green: #34A853;
    
    --color-primary: #4285F4;
    --color-secondary: #5F6368;
    --color-accent: #EA4335;
    --color-accent-light: #F28B82;
    --color-success: #34A853;
    --color-warning: #FBBC04;
    --color-background: #F8F9FA;
    --color-surface: #FFFFFF;
    --color-border: #DADCE0;
    --color-text: #202124;
    --color-text-secondary: #5F6368;
    --color-text-tertiary: #80868B;
    
    /* Google Material Design Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    --shadow-md: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
    --shadow-lg: 0 4px 6px 0 rgba(60, 64, 67, 0.3), 0 8px 16px 6px rgba(60, 64, 67, 0.15);
    --shadow-xl: 0 8px 12px 0 rgba(60, 64, 67, 0.3), 0 12px 24px 12px rgba(60, 64, 67, 0.15);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

.salary-calculator-wrapper {
    font-family: 'Google Sans', 'Product Sans', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 2rem 1rem;
    background: var(--color-background);
}

.salary-calculator-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: slideUp 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.calculator-header {
    background: var(--google-blue);
    padding: 3rem 2rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.calculator-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.calculator-header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 250px;
    height: 250px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(20px, -20px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

.calculator-title {
    margin: 0 0 0.5rem;
    font-size: 2.25rem;
    font-weight: 500;
    color: #FFFFFF;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.calculator-subtitle {
    margin: 0;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    letter-spacing: 0.01em;
    position: relative;
    z-index: 1;
}

.salary-form {
    padding: 2rem;
}

.form-section {
    margin-bottom: 2.5rem;
    animation: fadeIn 0.5s ease-out backwards;
}

.form-section:nth-child(1) { animation-delay: 0.1s; }
.form-section:nth-child(2) { animation-delay: 0.2s; }

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

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text);
    margin: 0 0 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--google-blue);
}

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

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.01em;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 0.875rem 3.5rem 0.875rem 1rem;
    font-family: 'Roboto Mono', 'Google Sans', monospace;
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    outline: none;
}

.input-wrapper input:hover {
    border-color: var(--color-text-secondary);
    box-shadow: 0 1px 1px 0 rgba(66, 133, 244, 0.1);
}

.input-wrapper input:focus {
    background: var(--color-surface);
    border-color: var(--google-blue);
    border-width: 2px;
    padding: 0.875rem 3.5rem 0.875rem calc(1rem - 1px);
    box-shadow: none;
}

.input-suffix {
    position: absolute;
    right: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: 'Google Sans', 'Product Sans', 'Roboto', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235F6368' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-select:hover {
    border-color: var(--color-text-secondary);
    box-shadow: 0 1px 1px 0 rgba(66, 133, 244, 0.1);
}

.form-select:focus {
    background: var(--color-surface);
    border-color: var(--google-blue);
    border-width: 2px;
    padding: 0.875rem calc(2.5rem - 1px) 0.875rem calc(1rem - 1px);
    box-shadow: none;
}

.calculate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1rem 2rem;
    font-family: 'Google Sans', 'Product Sans', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    color: #FFFFFF;
    background: var(--google-blue);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    margin-top: 1.5rem;
    text-transform: none;
    letter-spacing: 0.25px;
}

.calculate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0);
    transition: background var(--transition-base);
}

.calculate-btn:hover {
    box-shadow: var(--shadow-md);
}

.calculate-btn:hover::before {
    background: rgba(0, 0, 0, 0.08);
}

.calculate-btn:active {
    box-shadow: var(--shadow-lg);
}

.calculate-btn:active::before {
    background: rgba(0, 0, 0, 0.12);
}

.btn-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.result-section {
    padding: 2rem;
    background: var(--color-background);
    border-top: 2px solid var(--color-border);
    animation: slideDown 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-title {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text);
    margin: 0 0 1.5rem;
    text-align: center;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.result-card {
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    animation: scaleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
}

.result-card:nth-child(1) { animation-delay: 0.1s; }
.result-card:nth-child(2) { animation-delay: 0.2s; }
.result-card:nth-child(3) { animation-delay: 0.3s; }

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.result-card-primary {
    background: #E8F5E9;
    border-left: 4px solid var(--google-green);
}

.result-card-secondary {
    background: #FFF9E6;
    border-left: 4px solid var(--google-yellow);
}

.result-card-accent {
    background: var(--google-blue);
    border-left: 4px solid #1A73E8;
    grid-column: 1 / -1;
}

.result-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.result-card-accent .result-label {
    color: rgba(255, 255, 255, 0.9);
}

.result-value {
    font-family: 'Roboto Mono', 'Google Sans', monospace;
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.result-card-accent .result-value {
    color: #FFFFFF;
}

.result-value-large {
    font-size: 2.25rem;
}

.result-breakdown {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    animation: fadeIn 0.6s ease-out 0.4s backwards;
}

.breakdown-title {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    margin: 0 0 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--google-blue);
}

.breakdown-section {
    margin-bottom: 1.5rem;
}

.breakdown-section:last-child {
    margin-bottom: 0;
}

.breakdown-subtitle {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin: 0 0 0.75rem;
}

.breakdown-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.625rem 0.875rem;
    background: var(--color-background);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.breakdown-item:hover {
    background: #E8F0FE;
    transform: translateX(4px);
}

.breakdown-item-name {
    color: var(--color-text-secondary);
    font-weight: 500;
}

.breakdown-item-value {
    font-family: 'Roboto Mono', 'Google Sans', monospace;
    font-weight: 500;
    color: var(--color-text);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .salary-calculator-wrapper {
        padding: 1rem 0.5rem;
    }
    
    .calculator-header {
        padding: 2rem 1.5rem 1.5rem;
    }
    
    .calculator-title {
        font-size: 1.5rem;
    }
    
    .salary-form {
        padding: 1.5rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .result-section {
        padding: 1.5rem;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .result-value {
        font-size: 1.5rem;
    }
    
    .result-value-large {
        font-size: 1.875rem;
    }
}

@media (max-width: 480px) {
    .calculator-title {
        font-size: 1.25rem;
    }
    
    .calculator-subtitle {
        font-size: 0.875rem;
    }
    
    .section-title {
        font-size: 1.125rem;
    }
    
    .input-wrapper input {
        padding: 0.75rem 3rem 0.75rem 0.875rem;
    }
    
    .calculate-btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
}

/* フォームセクションごとに異なるGoogleカラーのアクセント */
.form-section:nth-child(1) .section-title {
    border-bottom-color: var(--google-blue);
}

.form-section:nth-child(2) .section-title {
    border-bottom-color: var(--google-green);
}

.form-section:nth-child(3) .section-title {
    border-bottom-color: var(--google-yellow);
}

.form-section:nth-child(4) .section-title {
    border-bottom-color: var(--google-red);
}