:root {
    --primary-color: #0ea5e9; /* Sky 500 */
    --primary-hover: #0284c7; /* Sky 600 */
    --secondary-color: #f8fafc; /* Slate 50 */
    --accent-color: #2dd4bf; /* Teal 400 */
    --text-main: #111827; /* Gray 900 */
    --text-light: #6b7280; /* Gray 500 */
    --border-color: #e5e7eb; /* Gray 200 */
    --input-bg: #f9fafb; /* Gray 50 */
    --success-color: #10b981; /* Emerald 500 */
    --warning-color: #f59e0b; /* Amber 500 */
    --danger-color: #ef4444; /* Red 500 */
    --bg-color: #f9fafb; /* Gray 50 */
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.3);
    --border-radius: 16px;
    --border-radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.ad-container {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
}

.ad-left {
    left: 20px;
}

.ad-right {
    right: 20px;
}

.ad-top-center {
    text-align: center;
    margin-bottom: 2rem;
}

/* Background decorations */
.background-shape {
    position: absolute;
    border-radius: 50%;
    z-index: -1;
    filter: blur(100px);
    opacity: 0.3;
}

.shape-1 {
    top: -150px;
    left: -150px;
    width: 450px;
    height: 450px;
    background: #e0f2fe; /* Sky 100 */
}

.shape-2 {
    bottom: 10%;
    right: -150px;
    width: 400px;
    height: 400px;
    background: #ccfbf1; /* Teal 100 */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
}

header h1 {
    margin-bottom: 1rem;
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-light);
    font-size: 1.125rem;
    max-width: 650px;
    margin: 0 auto;
}

/* Section styling */
.section-title {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.section-title h2 {
    font-size: 1.75rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title p {
    color: var(--text-light);
    font-size: 1rem;
    margin-top: 0.5rem;
}

.icon {
    font-size: 1.2em;
}

/* Common Card Styles */
.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* Common Settings Area */
.common-settings {
    margin-bottom: 3.5rem;
    display: flex;
    align-items: center;
    padding: 2rem;
}

.card-header-simple {
    margin-right: 3rem;
    flex-shrink: 0;
}

.card-header-simple h2 {
    font-size: 1.5rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
}

.area-group {
    flex-grow: 1;
    max-width: 350px;
    margin: 0 !important;
}

/* Grid Layout */
.directions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

/* Direction Cards */
.direction-card {
    display: flex;
    flex-direction: column;
    border: 2px solid transparent;
}

.direction-card.active {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.card-header {
    background-color: var(--secondary-color);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.direction-card.active .card-header {
    background-color: #f0f9ff; /* Sky 50 */
    border-bottom-color: #bae6fd; /* Sky 200 */
}

.compass-icon {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-light);
    background: white;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.direction-card.active .compass-icon {
    color: var(--primary-color);
    background-color: var(--card-bg);
    transform: rotate(360deg);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-main);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    position: relative;
    width: 1.5rem;
    height: 1.5rem;
    margin-right: 1rem;
    appearance: none;
    background-color: #fff;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.checkbox-label input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '✔';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1rem;
}

.card-body {
    padding: 1.5rem;
    transition: var(--transition);
}

.card-body.disabled {
    opacity: 0.5;
    pointer-events: none;
    filter: grayscale(80%);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 600;
}

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

.input-with-unit input {
    width: 100%;
    padding: 0.75rem 3.5rem 0.75rem 1rem; /* space for unit */
}

.input-with-unit .unit {
    position: absolute;
    right: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
    pointer-events: none;
}

input[type="number"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    color: var(--text-main);
    transition: var(--transition);
    font-family: inherit;
}

input[type="number"]:hover,
select:hover {
    background-color: #f3f4f6; /* Gray 100 */
    border-color: #d1d5db; /* Gray 300 */
}

input[type="number"]:focus,
select:focus {
    outline: none;
    background-color: white;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

/* Hide number spin buttons */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}
input[type=number] {
  -moz-appearance: textfield;
}

.card-header-main {
    position: relative;
}

/* Select wrapper for custom arrow */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    font-size: 0.8rem;
    color: var(--text-light);
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    transition: var(--transition);
}

.select-wrapper:focus-within::after {
    transform: translateY(-50%) rotate(180deg);
}

.dir-name {
    position: absolute;
    top: 0;
    right: 0;
    transform: translate(120%, 0.5rem);
}

select {
    appearance: none;
    padding-right: 2.5rem;
}

/* Action Button */
.action-container {
    text-align: center;
    margin: 4rem 0 2rem;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    padding: 1.25rem 4rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 10px 20px -5px rgba(14, 165, 233, 0.4);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.primary-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 25px -5px rgba(14, 165, 233, 0.5);
}

.primary-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px -5px rgba(14, 165, 233, 0.4);
}

.contact-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 8px 15px -5px rgba(14, 165, 233, 0.4);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 20px -5px rgba(14, 165, 233, 0.5);
}

.contact-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 10px -5px rgba(14, 165, 233, 0.4);
}

.close-btn {
    position: absolute;
    top: 0;
    right: 0.5rem;
    font-size: 2.5rem;
    color: var(--text-light);
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-main);
}


.btn-icon {
    font-size: 1.4em;
}

/* Result Area */
.result-area {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid var(--border-color);
    animation: fadeIn 0.8s ease-out;
}

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

.result-header {
    text-align: center;
    margin-bottom: 3rem;
}

.result-header h2 {
    color: var(--text-main);
    font-size: 2.5rem;
    font-weight: 800;
}

.result-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.res-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border-top: 5px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.res-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.res-card.front { border-top-color: var(--primary-color); }
.res-card.side { border-top-color: var(--success-color); }
.res-card.back { border-top-color: var(--warning-color); }

/* Badge for ranking if needed, or visual accent */
.res-card::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 120px;
    height: 120px;
    background-color: var(--primary-color);
    opacity: 0.05;
    border-radius: 50%;
    transition: var(--transition);
}
.res-card:hover::before {
    opacity: 0.1;
    transform: scale(1.1);
}

.front::before { background-color: var(--primary-color); }
.side::before { background-color: var(--success-color); }
.back::before { background-color: var(--warning-color); }

.res-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.res-dir {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.res-type {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
}

.front .res-type { background-color: var(--primary-color); }
.side .res-type { background-color: var(--success-color); }
.back .res-type { background-color: var(--warning-color); }

.res-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.res-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* 【削除厳禁】子要素がはみ出たら改行させる */
}

.res-label {
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: pre; /* 【削除厳禁】改行禁止 */
}

.res-val {
    font-weight: 600;
    color: var(--text-main);
    white-space: pre; /* 【削除厳禁】改行禁止 */
    margin-left: auto; /* 【削除厳禁】改行したときに右寄せにするためのプロパティ */
}

.res-footer {
    background-color: var(--secondary-color);
    border-radius: var(--border-radius-sm);
    padding: 1.25rem;
    margin-top: 2rem;
}

.calc-formula {
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    text-align: center;
}

.res-highlight-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-top: 0.75rem;
    flex-wrap: wrap; /* 【削除厳禁】子要素がはみ出たら改行させる */
}

.res-highlight-label {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-light);
    white-space: pre; /* 【削除厳禁】改行禁止 */
}

.res-highlight {
    font-size: 2rem;
    color: var(--primary-color); /* default */
    font-weight: 800;
    line-height: 1;
    white-space: pre; /* 【削除厳禁】改行禁止 */
    margin-left: auto; /* 【削除厳禁】改行したときに右寄せにするためのプロパティ */
}

.front .res-highlight { color: var(--primary-color); }
.side .res-highlight { color: var(--success-color); }
.back .res-highlight { color: var(--warning-color); }

/* Contact Section */
.contact-section {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid var(--border-color);
    transform: translateY(50px);
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.contact-section.visible {
    transform: translateY(0);
    opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 1600px) {
    .ad-container {
        display: none;
    }
}

@media (max-width: 1024px) {
    .directions-grid, .result-cards {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 2rem 1rem;
    }
    
    .common-settings {
        flex-direction: column;
        align-items: stretch;
    }
    
    .card-header-simple {
        margin-right: 0;
        margin-bottom: 1.5rem;
    }
    
    .area-group {
        max-width: 100%;
    }

    .directions-grid {
        grid-template-columns: 1fr;
    }
    
    .result-cards {
        grid-template-columns: 1fr;
    }
}