:root[data-theme="dark"] {
    --bg-main: #09090b;
    --bg-panel: #09090b;
    --border: #27272a;
    --border-hover: #3f3f46;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --accent: #fafafa;
    --accent-fg: #09090b;
    --hover-bg: #18181b;
    --upload-bg: #09090b;
}

:root[data-theme="light"] {
    --bg-main: #ffffff;
    --bg-panel: #ffffff;
    --border: #e4e4e7;
    --border-hover: #d4d4d8;
    --text-primary: #09090b;
    --text-secondary: #71717a;
    --accent: #09090b;
    --accent-fg: #fafafa;
    --hover-bg: #f4f4f5;
    --upload-bg: #ffffff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: -0.015em;
    -webkit-font-smoothing: antialiased;
}

body {
    background: var(--bg-main);
    color: var(--text-primary);
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 1.25rem;
    cursor: pointer;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: var(--hover-bg);
}

:root[data-theme="dark"] .dark-icon { display: none; }
:root[data-theme="light"] .light-icon { display: none; }

.container {
    width: 100%;
    max-width: 540px;
    padding: 2.5rem;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 4px 24px -12px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.app-logo {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border);
}

header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.upload-area {
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    background: var(--upload-bg);
    transition: all 0.2s ease;
    margin-bottom: 1.5rem;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--text-secondary);
    background: var(--hover-bg);
}

.upload-icon {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.upload-area h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.supported-formats {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.settings-area {
    animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--upload-bg);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.app-footer p {
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--fg-muted);
    user-select: none;
    cursor: default;
}

.file-info i {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.format-selector {
    margin-bottom: 1.5rem;
}

.format-selector label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.radio-group {
    display: flex;
    background: var(--upload-bg);
    padding: 0.25rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.radio-group .format-option {
    flex: 1 1 0px;
    display: flex;
}

.radio-group input[type="radio"] {
    display: none;
}

.radio-group label {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.25rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    margin: 0;
}

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

.primary-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent);
    color: var(--accent-fg);
    border: 1px solid var(--accent);
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.1s, opacity 0.2s;
}

.primary-btn:hover {
    opacity: 0.9;
}

.primary-btn:active {
    transform: scale(0.98);
}

.primary-btn.outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    margin-top: 1rem;
    text-decoration: none;
}

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

.result-area {
    text-align: center;
    animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.success-icon {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.result-area h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.download-box {
    text-align: left;
}

.download-box p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.url-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.url-container input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: var(--upload-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.8rem;
    outline: none;
}

.url-container input:focus {
    border-color: var(--text-secondary);
}

.icon-btn {
    background: var(--bg-panel);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 2.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.icon-btn:hover {
    background: var(--hover-bg);
    border-color: var(--border-hover);
}

.hint {
    font-size: 0.75rem !important;
    line-height: 1.5;
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    width: 100%;
    transition: color 0.2s;
}

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

.loading-overlay {
    position: absolute;
    inset: 0;
    background: var(--bg-panel);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

/* Footer */
.app-footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.social-links {
    margin-top: 0.75rem;
    display: flex;
    justify-content: center;
    gap: 1.25rem;
}

.social-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: color 0.2s;
}

.social-links a:hover {
    color: var(--text-primary);
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-main);
    border-top: 1px solid var(--border);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    z-index: 1000;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cookie-banner a {
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cookie-accept-btn {
    background: var(--text-primary);
    color: var(--bg-main);
    border: none;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.8rem;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.cookie-accept-btn:hover {
    opacity: 0.9;
}

/* Policy Pages */
.policy-page {
    max-width: 640px;
    width: 100%;
}
.policy-page.container {
    padding: 3rem;
}

.policy-content h2 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.policy-content h3 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.policy-content p,
.policy-content li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.policy-content ul {
    padding-left: 1.25rem;
    margin-bottom: 1rem;
}

.policy-content a {
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.policy-updated {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.policy-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

.policy-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.85rem;
}

.policy-table th,
.policy-table td {
    padding: 0.75rem;
    border: 1px solid var(--border);
    text-align: left;
}

.policy-table th {
    background: var(--upload-bg);
    color: var(--text-primary);
    font-weight: 500;
}

.home-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.home-link:hover {
    color: var(--text-primary);
}

@media (max-width: 600px) {
    .container, .policy-page.container {
        padding: 1.5rem;
        width: 90%;
        border-radius: 12px;
    }
    .cookie-banner {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Easter Egg Override */
.doge-mode-logo {
    animation: spin-fast 0.15s linear infinite !important;
}
.doge-mode-rainbow {
    animation: rainbow-bg 2s linear infinite !important;
}
@keyframes spin-fast {
    100% { transform: rotate(360deg); }
}
@keyframes rainbow-bg {
    0% { background-color: #ff0000; color: #ffff00; }
    16% { background-color: #ff7f00; color: #00ffff; }
    33% { background-color: #ffff00; color: #ff00ff; }
    50% { background-color: #00ff00; color: #ff0000; }
    66% { background-color: #0000ff; color: #ffff00; }
    83% { background-color: #4b0082; color: #00ff00; }
    100% { background-color: #ff0000; color: #ffff00; }
}

/* QR Code & Action Buttons */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}
.action-buttons .primary-btn {
    margin-top: 0;
    flex: 1;
}
.qr-container {
    margin-top: 1rem;
    text-align: center;
    animation: slideUpFade 0.3s ease;
}
.qr-container img {
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 1rem;
    background: #ffffff;
    max-width: 200px;
    box-shadow: 0 4px 20px -10px rgba(0,0,0,0.1);
}

/* ============================================================
   プライバシーバッジ
   ============================================================ */
.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1rem;
    margin-bottom: 2rem;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--hover-bg);
    border: 1px solid var(--border);
    letter-spacing: 0;
}
.privacy-badge i {
    font-size: 0.9rem;
}

/* ============================================================
   結果画面フッターアクション
   ============================================================ */
.result-footer-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}
.delete-btn {
    color: var(--text-secondary) !important;
    font-size: 0.8rem !important;
    opacity: 0.7;
    transition: opacity 0.2s ease, color 0.2s ease;
}
.delete-btn:hover {
    opacity: 1;
}
.delete-btn.deleted {
    pointer-events: none;
}