:root {
    --primary-color: #6aa89d;
    --primary-color-dark: color-mix(in srgb, var(--primary-color), #000 15%);
    --primary-color-light: color-mix(in srgb, var(--primary-color), #fff 90%);
    --secondary-color: #f28100;
    --secondary-color-dark: color-mix(in srgb, var(--secondary-color), #000 30%);;
    --secondary-color-light: color-mix(in srgb, var(--secondary-color), #fff 90%);
    --text-color-main: #444;
    --text-color-placeholder: #a0a0a0;
    --input-border-color: #d1d5db;
}

body {
    font-family: "BIZ UDPGothic", "Noto Sans JP", "Helvetica Neue",  Arial, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--primary-color-light);
    color: var(--text-color-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.mt-xs { 
    margin-top: 0.5rem; 
}
.mt-sm { 
    margin-top: 1rem; 
}
.mt-md { 
    margin-top: 1.5rem; 
}
.mt-lg { 
    margin-top: 3rem; 
}

#container {
    width: 95%;
    max-width: 720px;
    margin: 40px auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}


.title {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 20px;
    font-size: 1.4rem;
    font-weight: bold;
    text-align: left;
    display: flex;
    align-items: center;
    min-height: 48px;
}

.title-logo-icon {
    display: inline-block;
    width: 32px;
    height: 32px;
    margin-right: 10px;
    background-image: url('../img/logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    flex-shrink: 0;
}

.subtitle {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 0;
}

.form-content {
    padding: 30px;
}

.form-content .subtitle {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.sub-label {
    display: flex;
    font-weight: bold;
    margin: 12px 0;
    align-items: center;
}

.sub-label::before {
    content: "";
    display: inline-block;
    width: 7px;
    height: 1.2em;
    background: var(--primary-color);
    margin-right: 12px;
    border-radius: 2px;
}

#drag_drop_area {
    border: 1px solid var(--primary-color);
    background-color: var(--primary-color-light);
    border-radius: 6px;
    padding: 20px 20px 0 20px;
    text-align: center;
    transition: all 0.3s ease;
    margin-bottom: 12px;
    cursor: pointer;
}

#drag_drop_area.dragover {
    background-color: color-mix(in srgb, var(--primary-color), #fff 75%);
    border-style: dotted;
}

#drag_drop_info {
    color: var(--primary-color);
    margin: 0;
}

input[type="text"], input[type="email"], textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--input-border-color);
    border-radius: 6px;
    box-sizing: border-box;
    font-family: inherit;
    font-size: 1rem;
    margin-top: 5px;
}

input[type="text"]:focus, input[type="email"]:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 173, 115, 0.2);
}

.file-disp {
    color: var(--secondary-color); 
    font-weight: bold; 
    font-size: 1.1rem;
    margin-top: 10px;
}

.center-text {
    text-align: center;
}

.small-text {
    font-size: 0.85rem;
    color: #6b7280;
}

.success-icon {
    font-size: 3.4rem;
    color: var(--primary-color);
    background-color: var(--primary-color-light);
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
    margin: 20px auto;
    font-weight: bolder;
}

.msg-info {
    margin: 30px 0;
    padding: 15px;
    color: var(--text-color-main);
    background-color: var(--primary-color-light);
    font-size: 1.1rem;
}

.msg-success {
    margin: 30px 0;
    padding: 15px;
    color: var(--primary-color-dark);
    background-color: var(--primary-color-light);
    font-size: 1.1rem;
    border: 2px solid #28a745;
}

.msg-err {
    margin: 10px 0;
    padding: 5px 10px;
    color: #c92232;
    background-color: #f8d7da;
    font-size: 1.0rem;
}

.btn-primary {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 20px auto 0;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-primary:not(:disabled):hover {
    background-color: var(--primary-color-dark);
}

.btn-primary:not(:disabled):active {
    background-color: var(--primary-color-dark);
    transform: scale(0.98);
}

.btn-primary:disabled {
    background-color: #cccccc;
    color: #ffffff;
    cursor: text;
    box-shadow: none;
}

.btn-primary.is-processing:disabled {
    cursor: wait;
}

.btn-back {
    display: inline-block;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    border: none;
    background-color: #6b7280;
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    transition: 0.3s;
    margin-top: 20px;
}

.btn-back:hover {
    text-decoration: none;
    background-color: #3f444d;
    color: #fff;
}

.btn-back:active {
    background-color: #3f444d;
    transform: scale(0.98);
}

::placeholder {
    color: var(--text-color-placeholder);
    opacity: 1;
}

fieldset {
  border: 1px solid #c0c0c0;
}

#footer {
    margin-top: auto;
    padding: 10px 0;
    text-align: center;
    color: #888;
    font-size: 0.8rem;
    border-top: 1px solid #ddd;
    background-color: white;
}
.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px;
}

.copyright {
    margin: 0;
    text-align: left;
}

.version {
    margin: 0;
    text-align: right;
}

/* SP */
@media (max-width: 480px) {
    #container {
        margin: 0;
        width: 100%;
        border-radius: 0;
    }

    .form-content p {
        font-size: 0.95rem;
        line-height: 1.5;
        text-align: left;
    }

    .form-content {
        padding: 20px 15px;
    }

    .title {
        font-size: 1.1rem;
        padding: 10px 15px;
    }

    input[type="text"],
    textarea {
        font-size: 16px;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .btn-primary {
        width: 100%;
        max-width: none;
        padding: 16px;
        border-radius: 50px;
        font-size: 1.1rem;
    }

    .small-text {
        font-size: 0.8rem;
    }

    #footer {
        font-size: 0.7rem;
    }

}

@media (max-width: 768px) {

    #drag-drop-info br {
        display: none;
    }

    .footer-container {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .copyright {
        text-align: center;
    }

    .version {
        text-align: center;
    }    
}

@media (hover: none) {
    .btn-primary:hover {
        background-color: var(--primary-color);
    }
}