@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --background-color: #f4f7f9;
    --container-background: #ffffff;
    --text-color: #34495e;
    --heading-color: #2c3e50;
    --link-color: #3498db;
    --link-hover-color: #2980b9;
    --footer-text-color: #95a5a6;
    --border-color: #e0e6ed;
    --paypay-color: #d82828;
    --success-color: #27ae60;
    --cancel-color: #c0392b;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex-grow: 1;
    width: 100%;
}

/* --- General Site Structure --- */

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 50px;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    box-sizing: border-box;
}

.logo {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--secondary-color);
}
.logo a {
    color: inherit;
    text-decoration: none;
}

.main-nav a {
    margin: 0 15px;
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}
.main-nav a:hover {
    color: var(--primary-color);
}

.invite-button {
    background-color: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 500;
    text-decoration: none;
    transition: background-color 0.3s ease;
}
.invite-button:hover {
    background-color: var(--link-hover-color);
    color: #fff;
}

.main-footer-bar {
    background-color: var(--secondary-color);
    color: #fff;
    padding: 20px 0;
    width: 100%;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-nav a {
    color: #fff;
    margin-left: 20px;
    opacity: 0.8;
    text-decoration: none;
    transition: opacity 0.3s ease;
}
.footer-nav a:hover {
    opacity: 1;
    text-decoration: underline;
}


/* --- Generic Content Pages (Privacy, Terms) --- */

.container {
    max-width: 850px;
    width: 90%;
    margin: 40px auto;
    padding: 50px;
    box-sizing: border-box;
    background-color: var(--container-background);
    border-radius: 16px;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-color);
}

.container h1 {
    text-align: center;
    color: var(--heading-color);
    font-weight: 700;
    font-size: 2.2em;
    margin-top: 0;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--primary-color);
}

.container h2 {
    color: var(--secondary-color);
    font-weight: 500;
    font-size: 1.5em;
    margin-top: 40px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.container p, .container li {
    line-height: 1.8;
    font-size: 1.05em;
}

.container ul {
    padding-left: 25px;
    list-style-type: '✓';
}

.container li {
    padding-left: 10px;
}

.container .footer {
    text-align: center;
    margin-top: 50px;
    font-size: 0.9em;
    color: var(--footer-text-color);
}


/* --- Homepage Sections --- */

section {
    padding: 80px 50px;
    text-align: center;
    box-sizing: border-box;
    width: 100%;
}

section h2 {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--heading-color);
    margin-top: 0;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2em;
    margin-bottom: 60px;
    color: var(--text-color);
    opacity: 0.9;
}

.hero {
    background: linear-gradient(45deg, var(--primary-color), #5dade2);
    color: #fff;
    padding: 100px 20px;
}

.hero h1 {
    font-size: 3em;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 20px;
    color: #fff;
}

.hero .subtitle {
    color: #fff;
}

.hero-button {
    background-color: #fff;
    color: var(--primary-color);
    padding: 15px 35px;
    font-size: 1.1em;
    font-weight: 700;
    border-radius: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    transition: all 0.3s ease;
}
.hero-button:hover {
    background-color: #f4f7f9;
    color: var(--link-hover-color);
}

.hero .note {
    margin-top: 20px;
    font-size: 0.9em;
    opacity: 0.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    text-align: left;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.07);
    border: 1px solid var(--border-color);
}

.feature-item i {
    font-size: 2.5em;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 1.4em;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.how-to-use {
    background-color: #fff;
}

.steps {
    display: flex;
    justify-content: space-around;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.step {
    max-width: 300px;
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: 700;
    margin-bottom: 20px;
}

.step h3 {
    font-size: 1.4em;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.support {
    background: linear-gradient(45deg, #2c3e50, #34495e);
    color: #fff;
}

.support h2 {
    color: #fff;
}

.support .subtitle {
    color: #fff;
}

.support-button {
    background-color: var(--primary-color);
    color: #fff;
    padding: 15px 35px;
    font-size: 1.1em;
    font-weight: 700;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s ease;
}
.support-button:hover {
    background-color: var(--link-hover-color);
    color: #fff;
}


/* --- Plans Page --- */

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    align-items: stretch;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
}

.plan-item {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.plan-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.plan-item.recommended {
    border-top: 4px solid var(--primary-color);
}

.plan-header {
    padding: 40px;
    border-bottom: 1px solid var(--border-color);
}

.plan-header h3 {
    font-size: 1.6em;
    color: var(--secondary-color);
    margin: 0 0 10px;
}

.price {
    font-size: 2.8em;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.price-note {
    font-size: 1em;
    color: var(--footer-text-color);
    margin: 0;
}

.plan-features {
    padding: 40px;
    list-style: none;
    text-align: left;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.plan-features .fas {
    margin-right: 15px;
    width: 20px;
}

.plan-features .fa-check {
    color: var(--success-color);
}

.plan-features .fa-times {
    color: var(--cancel-color);
}

.feature-detail {
    font-size: 0.9em;
    color: var(--footer-text-color);
    padding-left: 35px !important;
    margin-top: -10px;
}

.plan-footer {
    padding: 40px;
    border-top: 1px solid var(--border-color);
}

.plan-button {
    display: block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 15px 20px;
    border-radius: 5px;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.3s ease;
    width: 100%;
    box-sizing: border-box;
    border: none;
}
.plan-button:hover {
    background-color: var(--link-hover-color);
    color: #fff;
}

.plan-item.free .plan-button {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}
.plan-item.free .plan-button:hover {
    background-color: var(--primary-color);
    color: #fff;
}


/* --- Purchase Page --- */

.purchase-container {
    max-width: 700px;
    margin: 0 auto;
    background: #fff;
    padding: 50px;
    border-radius: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    border: 1px solid var(--border-color);
    text-align: left;
}

.plan-summary h3 {
    font-size: 1.5em;
    color: var(--secondary-color);
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.summary-item, .summary-total {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 1.1em;
}

.summary-total {
    font-weight: 700;
    font-size: 1.3em;
    color: var(--heading-color);
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.payment-info {
    margin-top: 40px;
}

.payment-info h3 {
    font-size: 1.5em;
    color: var(--secondary-color);
    margin-top: 0;
    margin-bottom: 20px;
}

.payment-button-paypay {
    display: inline-block;
    background-color: var(--paypay-color);
    color: #fff;
    padding: 15px 35px;
    border-radius: 5px;
    font-weight: 700;
    font-size: 1.1em;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.payment-button-paypay:hover {
    background-color: #b82020;
}

.payment-button-paypay i {
    margin-right: 10px;
}


/* --- PayPay Modal --- */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal-content {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    width: 90%;
    max-width: 450px;
    text-align: center;
    position: relative;
}

.close-button {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2em;
    color: #aaa;
    background: none;
    border: none;
    cursor: pointer;
}

.modal-content h3 {
    margin-top: 0;
    font-size: 1.8em;
    color: var(--heading-color);
}

#qr-code-container {
    margin: 30px 0;
}

#qr-code-container img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: 5px;
}

#payment-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--paypay-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
}

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


/* --- Payment Result & Success Form Pages --- */

.payment-result {
    padding: 80px 20px;
}

.result-icon {
    font-size: 6em;
    margin-bottom: 30px;
}

.result-icon.success {
    color: var(--success-color);
}

.result-icon.cancel {
    color: var(--cancel-color);
}

.result-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 15px 35px;
    border-radius: 5px;
    font-weight: 700;
    font-size: 1.1em;
    margin-top: 30px;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.result-button:hover {
    background-color: var(--link-hover-color);
    color: #fff;
}

.purchase-form-container {
    max-width: 600px;
    margin: 40px auto 0;
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.07);
    border: 1px solid var(--border-color);
    text-align: left;
}

.purchase-form-container h3 {
    text-align: center;
    font-size: 1.6em;
    color: var(--heading-color);
    margin-top: 0;
    margin-bottom: 15px;
}

.purchase-form-container p {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1em;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--secondary-color);
}

.form-group input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1.1em;
    box-sizing: border-box;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.submit-button {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: var(--success-color);
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 1.2em;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-button:hover {
    background-color: #229954;
}

/* --- Purchase Modal --- */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    border-radius: 10px;
    text-align: left;
}

.close-button {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close-button:hover,
.close-button:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

.modal-content h2 {
    margin-top: 0;
}

.modal-content form {
    margin-top: 20px;
}

.modal-content label {
    display: block;
    margin-bottom: 5px;
}

.modal-content input {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    box-sizing: border-box;
}

.paypay-link {
    display: inline-block;
    background-color: var(--paypay-color);
    color: white;
    padding: 10px 15px;
    text-decoration: none;
    border-radius: 5px;
    margin-bottom: 20px;
}

.submit-button {
    background-color: var(--success-color);
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
}