/* CSS Reset & Variables */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --secondary: #059669;
    --danger: #dc2626;
    --danger-light: #fef2f2;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    
    --bg-color: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #cbd5e1;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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;
    position: relative;
}

/* Dynamic Background Elements */
.blob-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 20s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, #bfdbfe, #3b82f6);
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, #a7f3d0, #10b981);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 40%;
    width: 30vw;
    height: 30vw;
    background: radial-gradient(circle, #fed7aa, #f59e0b);
    animation-duration: 25s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(5%, 10%) scale(1.1); }
    100% { transform: translate(-5%, 5%) scale(0.9); }
}

/* Layout */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Glassmorphism Classes */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: 2.5rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.glass-card:hover {
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
    transform: translateY(-2px);
}

.glass-card.transparent-bg {
    background: rgba(255, 255, 255, 0.6);
}

/* Header */
.form-header {
    text-align: center;
    border-top: 4px solid var(--primary);
}

.form-title {
    display: inline-block;
    text-align: left;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.form-subtitle {
    color: var(--text-muted);
}

.instruction-text {
    padding: 1.5rem 2rem;
    font-size: 0.95rem;
}

/* Sections */
.section-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-bottom-left-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e2e8f0;
    color: var(--text-main);
}

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

.row-group {
    display: flex;
    flex-direction: column;
}

@media (min-width: 768px) {
    .row-group {
        flex-direction: row;
        align-items: flex-start;
        border-bottom: 1px dashed var(--border-color);
        padding-bottom: 1.5rem;
    }
    .row-group:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .form-label {
        width: 32%;
        flex-shrink: 0;
        padding-right: 1.5rem;
        margin-top: 0.5rem;
    }
    .input-area {
        flex-grow: 1;
        width: 68%;
    }
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-left: 0.5rem;
    vertical-align: middle;
}

.badge.required {
    background-color: var(--danger);
    color: white;
}

.helper-text {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

.font-normal { font-weight: 400; }
.font-bold { font-weight: 700; }
.text-danger { color: var(--danger); }
.text-success { color: var(--secondary); }
.text-link { color: var(--primary); text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }
.ml-0 { margin-left: 0; }
.ml-2 { margin-left: 0.5rem; }
.ml-auto { margin-left: auto; }
.d-flex-align { display: flex; align-items: center; }
.border-0 { border: none !important; }

/* Inputs */
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-main);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-control.is-invalid {
    border-color: #f43f5e !important;
    background-color: #fff1f2 !important;
}

.radio-vertical-list.is-invalid {
    border: 1px solid #f43f5e;
    background-color: #fff1f2;
    padding: 1rem;
    border-radius: var(--radius-sm);
}

.confirm-data-list {
    margin-bottom: 2rem;
    border-top: 1px solid var(--border-color);
}
.confirm-row {
    display: flex;
    flex-direction: column;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}
@media (min-width: 640px) {
    .confirm-row {
        flex-direction: row;
    }
    .confirm-label {
        width: 35%;
        font-weight: 600;
        color: var(--text-muted);
        padding-right: 1rem;
    }
    .confirm-value {
        width: 65%;
        font-weight: 500;
        color: var(--text-main);
        word-break: break-word;
    }
}

.error-msg {
    display: none;
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 0.4rem;
    font-weight: 500;
}

.is-invalid + .error-msg,
.is-invalid ~ .error-msg {
    display: block;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Custom Addons */
.input-with-addon {
    display: flex;
    align-items: center;
}

.input-with-addon .form-control {
    flex-grow: 1;
}

.input-with-addon .addon {
    padding: 0 1rem;
    font-weight: 600;
    color: var(--text-muted);
}

.prefix-addon .form-control {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.prefix-addon .addon {
    background: #f1f5f9;
    border: 1px solid var(--border-color);
    border-right: none;
    border-top-left-radius: var(--radius-sm);
    border-bottom-left-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
}

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

.select-wrapper::after {
    content: "▼";
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-muted);
    pointer-events: none;
}

select.form-control {
    appearance: none;
    padding-right: 2.5rem;
    cursor: pointer;
}

/* Custom Radio & Checkbox */
.custom-radio, .custom-checkbox {
    display: inline-flex;
    align-items: flex-start;
    position: relative;
    padding-left: 2rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    font-size: 0.95rem;
    user-select: none;
    transition: var(--transition);
}

.custom-radio:hover, .custom-checkbox:hover {
    color: var(--primary);
}

.custom-radio input, .custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.radio-mark, .checkbox-mark {
    position: absolute;
    top: 0.15rem;
    left: 0;
    height: 1.25rem;
    width: 1.25rem;
    background-color: #fff;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.radio-mark {
    border-radius: 50%;
}

.checkbox-mark {
    border-radius: 4px;
}

.custom-radio:hover input ~ .radio-mark,
.custom-checkbox:hover input ~ .checkbox-mark {
    border-color: var(--primary);
}

.custom-radio input:checked ~ .radio-mark,
.custom-checkbox input:checked ~ .checkbox-mark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.radio-mark:after, .checkbox-mark:after {
    content: "";
    position: absolute;
    display: none;
}

.custom-radio input:checked ~ .radio-mark:after,
.custom-checkbox input:checked ~ .checkbox-mark:after {
    display: block;
}

.custom-radio .radio-mark:after {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
}

.custom-checkbox .checkbox-mark:after {
    left: 5px;
    top: 1px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

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

.radio-text {
    line-height: 1.4;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-top: 1rem;
}

@media (min-width: 640px) {
    .checkbox-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.boxed-checkbox {
    background: white;
    padding: 1.5rem;
    padding-left: 3.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    width: 100%;
}
.boxed-checkbox .checkbox-mark {
    left: 1.5rem;
    top: 1.6rem;
}

/* Address Nested Group */
.nested-group {
    background: #f8fafc;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    overflow: hidden;
}

.nested-row {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.2rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px dashed var(--border-color);
}

@media (min-width: 640px) {
    .nested-row {
        flex-direction: row;
        align-items: baseline;
    }
    .nested-label {
        width: 140px;
        flex-shrink: 0;
        font-size: 0.9rem;
        font-weight: 600;
        padding-right: 1rem;
    }
    .nested-input {
        flex-grow: 1;
    }
}

/* Icons */
.block-icon {
    color: var(--primary);
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

/* File Upload */
.file-upload-area {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    background: #f8fafc;
    padding: 2.5rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload-area:hover, .file-upload-area.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 10;
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.file-upload-area:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.btn-select-file {
    background: white;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    pointer-events: none;
}

.file-name {
    font-weight: 600;
    word-break: break-all;
}

/* Legal List */
.legal-list {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.legal-list li {
    margin-bottom: 0.5rem;
}

/* Alert Box */
.alert-box {
    background-color: var(--warning-bg);
    border-left: 4px solid var(--warning);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
}

.alert-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.alert-list {
    list-style: none;
    font-size: 0.85rem;
    padding: 0;
}

.alert-list li {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary-light);
}

.btn-full-width {
    width: 100%;
}

.submit-area {
    text-align: center;
    margin: 3rem 0;
}

.btn-submit {
    padding: 1rem 4rem;
    font-size: 1.2rem;
    border-radius: 50px;
    min-width: 250px;
}

.btn-submit.loading .btn-text {
    opacity: 0;
}

.btn-submit.loading .loader-spinner {
    display: block;
}

.loader-spinner {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Footer Notices */
.form-footer {
    background: transparent;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 3rem;
}

.form-footer p {
    margin-bottom: 1rem;
}

.copyright {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    max-width: 450px;
    width: 90%;
    text-align: center;
    transform: translateY(20px) scale(0.95);
    transition: var(--transition);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-icon {
    margin-bottom: 1rem;
}