:root {
    --picnet-bg: #f7f9f8;
    --picnet-surface: #ffffff;
    --picnet-surface-muted: #f4f7f5;
    --picnet-ink: #18211d;
    --picnet-ink-strong: #111915;
    --picnet-muted: #546159;
    --picnet-border: #cbd5cf;
    --picnet-border-light: #dce3df;
    --picnet-green: #178447;
    --picnet-green-dark: #0e6535;
    --picnet-green-soft: #e9f6ee;
    --picnet-coral: #dc665f;
    --picnet-blue-soft: #edf4fb;
    --picnet-blue-border: #c8d9eb;
    --picnet-blue-text: #34536e;
    --picnet-danger: #b84038;
    --picnet-shadow: 0 12px 32px rgba(31, 48, 39, 0.06);
}

* { box-sizing: border-box; }
html { color-scheme: light; }
body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background: var(--picnet-bg) !important;
    color: var(--picnet-ink) !important;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
    line-height: 1.5;
    letter-spacing: 0 !important;
}
button, input, select, textarea { font: inherit; letter-spacing: 0 !important; }
button, select, input[type="range"], input[type="checkbox"], input[type="color"] { cursor: pointer; }
a { color: inherit; }
button:focus-visible, a:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 3px solid rgba(23, 132, 71, 0.22);
    outline-offset: 2px;
}

.header {
    position: sticky !important;
    top: 0;
    z-index: 1000;
    width: 100%;
    min-height: 64px;
    padding: 8px max(20px, calc((100vw - 1200px) / 2 + 20px)) !important;
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    border-bottom: 1px solid var(--picnet-border-light) !important;
    background: rgba(255, 255, 255, 0.96) !important;
    box-shadow: none !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.logo, .brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.logo img, .brand img { display: block; width: 116px !important; height: auto !important; max-height: 42px; }
.menu {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 18px !important;
    margin-left: auto;
}
.menu a {
    color: #37443d !important;
    font-size: 0.88rem !important;
    font-weight: 700 !important;
    text-decoration: none !important;
    white-space: nowrap;
}
.menu a:hover { color: var(--picnet-green-dark) !important; }
.picnet-actions { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.picnet-tools-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #37443d;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
}
.picnet-tools-link:hover { color: var(--picnet-green-dark); }
.picnet-lang-switch {
    display: inline-flex;
    gap: 3px;
    padding: 3px;
    border: 1px solid var(--picnet-border-light);
    border-radius: 8px;
    background: var(--picnet-surface-muted);
}
.picnet-lang-btn {
    min-width: 42px;
    min-height: 34px;
    padding: 6px 10px;
    border: 0;
    border-radius: 5px;
    background: transparent;
    color: var(--picnet-muted);
    font-size: 0.82rem;
    font-weight: 700;
}
.picnet-lang-btn.active {
    background: var(--picnet-surface);
    color: var(--picnet-ink-strong);
    box-shadow: 0 1px 4px rgba(24, 33, 29, 0.1);
}
.hamburger {
    width: 40px;
    height: 40px;
    display: none !important;
    place-items: center;
    flex: 0 0 auto;
    padding: 0 !important;
    border: 1px solid var(--picnet-border) !important;
    border-radius: 6px !important;
    background: white !important;
    color: var(--picnet-ink) !important;
    font-size: 1.25rem !important;
}

.main-wrapper, .page-wrapper, main {
    width: min(100% - 40px, 1200px) !important;
    max-width: 1200px !important;
    margin: 0 auto !important;
    padding: 34px 0 64px !important;
}
.container { max-width: none !important; margin: 0 !important; padding: 0 !important; }
.title-section { margin-bottom: 22px; }
h1 {
    margin: 0 !important;
    color: var(--picnet-ink-strong) !important;
    font-size: 2.6rem !important;
    line-height: 1.08 !important;
    font-weight: 700 !important;
    letter-spacing: 0 !important;
}
.sub-title, .subtitle {
    max-width: 780px;
    margin: 10px 0 22px !important;
    padding: 0 !important;
    border: 0 !important;
    color: var(--picnet-muted) !important;
    font-size: 1.04rem !important;
}
.picnet-privacy-note {
    width: fit-content;
    min-height: 54px;
    margin: 0 0 22px;
    padding: 13px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid #c7e1d1;
    border-radius: 8px;
    background: var(--picnet-green-soft);
    color: #245f3c;
    font-size: 0.88rem;
    font-weight: 700;
}

.tool-card, .tab-content.active, .seo-section {
    padding: 24px !important;
    border: 1px solid var(--picnet-border) !important;
    border-radius: 8px !important;
    background: var(--picnet-surface) !important;
    box-shadow: var(--picnet-shadow) !important;
}
.tool-card { margin-top: 0 !important; }
.tab-content { margin-top: 18px; }
.tab-nav, .mode-switch, .format-options {
    display: flex;
    gap: 3px !important;
    padding: 3px !important;
    border: 1px solid var(--picnet-border-light) !important;
    border-radius: 8px !important;
    background: var(--picnet-surface-muted) !important;
    box-shadow: none !important;
}
.tab-btn, .mode-btn, .format-option {
    flex: 1;
    min-height: 40px;
    padding: 8px 14px !important;
    border: 0 !important;
    border-radius: 5px !important;
    background: transparent !important;
    color: var(--picnet-muted) !important;
    font-size: 0.88rem !important;
    font-weight: 700 !important;
    white-space: normal;
}
.tab-btn.active, .mode-btn.active, .format-option.active {
    background: var(--picnet-surface) !important;
    color: var(--picnet-ink-strong) !important;
    box-shadow: 0 1px 4px rgba(24, 33, 29, 0.1) !important;
}

.dropzone {
    width: 100%;
    min-height: 210px;
    padding: 28px 20px !important;
    display: flex !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1.5px dashed #9eada4 !important;
    border-radius: 8px !important;
    background: #fbfcfb !important;
    color: var(--picnet-ink) !important;
    text-align: center;
    transition: border-color 160ms ease, background 160ms ease;
}
.dropzone:hover, .dropzone.dragover {
    border-color: var(--picnet-green) !important;
    background: #f2faf5 !important;
}
.dropzone-icon {
    width: 52px;
    height: 52px;
    display: grid !important;
    place-items: center;
    margin-bottom: 14px !important;
    border-radius: 8px;
    background: var(--picnet-green);
    color: white;
    font-size: 1.45rem !important;
}
.dropzone-title { color: var(--picnet-ink); font-size: 1.05rem !important; font-weight: 700 !important; }
.dropzone-hint { margin-top: 7px; color: var(--picnet-muted) !important; font-size: 0.86rem !important; }
.file-badge { color: #37443d !important; font-size: 0.88rem; font-weight: 700 !important; }

.control-panel, .settings-panel, .options-panel, .quality-section, .base64-section, .format-selector, .svg-input-area, .upload-panel, .result-panel {
    border: 1px solid var(--picnet-border-light) !important;
    border-radius: 8px !important;
    background: var(--picnet-surface-muted) !important;
    box-shadow: none !important;
}
.control-panel, .settings-panel, .options-panel, .quality-section, .base64-section, .format-selector {
    padding: 18px !important;
}
select, textarea, input[type="number"], input[type="text"] {
    border: 1px solid var(--picnet-border) !important;
    border-radius: 6px !important;
    background-color: white !important;
    color: var(--picnet-ink) !important;
}
input[type="range"] { accent-color: var(--picnet-green); }
.quality-value, #qualityValue { color: var(--picnet-green-dark) !important; font-weight: 700; }

.btn, .btn-primary, .btn-secondary, .btn-outline, .btn-upload, .btn-copy, .btn-download {
    min-height: 44px;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px !important;
    border-radius: 6px !important;
    font-weight: 700 !important;
    text-decoration: none !important;
}
.btn-primary, .btn-upload, .btn-copy {
    border: 1px solid var(--picnet-green) !important;
    background: var(--picnet-green) !important;
    color: white !important;
}
.btn-primary:hover, .btn-upload:hover, .btn-copy:hover {
    border-color: var(--picnet-green-dark) !important;
    background: var(--picnet-green-dark) !important;
}
.btn-secondary, .btn-outline, .btn-download {
    border: 1px solid var(--picnet-border) !important;
    background: white !important;
    color: #37443d !important;
}
.btn-secondary:hover, .btn-outline:hover, .btn-download:hover { background: var(--picnet-surface-muted) !important; }
.btn:disabled { opacity: 0.48; cursor: not-allowed; }
.action-row, .action-bar, .button-container { gap: 10px !important; }

.status-box, .output-message, .notice, .result-placeholder {
    border: 1px solid var(--picnet-blue-border) !important;
    border-radius: 6px !important;
    background: var(--picnet-blue-soft) !important;
    color: var(--picnet-blue-text) !important;
    font-size: 0.82rem !important;
    font-weight: 600 !important;
}
.status-box.success, .success-box { border-color: #b9dcc6 !important; background: var(--picnet-green-soft) !important; color: #245f3c !important; }
.status-box.error, .error-box { border-color: #e7c1be !important; background: #fff2f1 !important; color: #8c332e !important; }

.preview-grid, .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)) !important;
    gap: 10px !important;
}
.preview-card, .feature-card {
    min-width: 0;
    padding: 16px !important;
    border: 1px solid var(--picnet-border-light) !important;
    border-radius: 8px !important;
    background: white !important;
    box-shadow: none !important;
}
.feature-grid { margin-top: 24px !important; }
.feature-card h3, .feature-card h4 {
    margin: 0 0 6px !important;
    color: var(--picnet-ink-strong) !important;
    font-size: 0.9rem !important;
}
.feature-card p, .feature-card { color: var(--picnet-muted) !important; font-size: 0.82rem !important; }
.footnote {
    color: var(--picnet-muted) !important;
    font-size: 0.78rem !important;
    font-weight: 600;
    text-align: center;
}

.site-footer, footer.picnet-footer {
    width: 100%;
    margin: 0 !important;
    padding: 0 !important;
    border-top: 1px solid var(--picnet-border-light) !important;
    background: white !important;
    color: var(--picnet-muted) !important;
}
.picnet-footer-inner {
    width: min(100% - 40px, 1200px);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    font-size: 0.8rem;
}
.picnet-footer a {
    color: var(--picnet-ink) !important;
    font-weight: 700;
    text-decoration: none;
}
.picnet-footer a:hover { color: var(--picnet-green-dark) !important; text-decoration: underline; }

@media (max-width: 980px) {
    .menu { gap: 12px !important; overflow-x: auto; padding-bottom: 2px; }
    .menu a { font-size: 0.8rem !important; }
}
@media (max-width: 768px) {
    .header { min-height: 58px; padding-inline: 14px !important; }
    .logo img, .brand img { width: 96px !important; }
    .hamburger { display: grid !important; }
    .menu {
        display: none !important;
        position: absolute;
        top: 58px;
        left: 0;
        right: 0;
        z-index: 999;
        flex-direction: column;
        align-items: stretch;
        gap: 0 !important;
        padding: 8px 14px 14px !important;
        border-bottom: 1px solid var(--picnet-border-light);
        background: white;
        box-shadow: 0 16px 24px -8px rgba(24, 33, 29, 0.1);
    }
    .menu.active { display: flex !important; }
    .menu a { padding: 10px 0; font-size: 0.95rem !important; }
    .picnet-actions { margin-left: auto; gap: 8px; }
    .picnet-tools-link span { display: none; }
    .main-wrapper, .page-wrapper, main {
        width: min(100% - 28px, 1200px) !important;
        padding: 24px 0 44px !important;
    }
    h1 { font-size: 2rem !important; }
    .sub-title, .subtitle { font-size: 0.92rem !important; }
    .picnet-privacy-note { width: 100%; min-height: 0; }
    .tool-card, .tab-content.active, .seo-section { padding: 14px !important; }
    .tab-nav, .mode-switch, .format-options { flex-direction: column; }
    .dropzone { min-height: 190px; padding: 24px 12px !important; }
    .action-row, .action-bar, .button-container { align-items: stretch !important; flex-direction: column !important; }
    .btn, .btn-primary, .btn-secondary, .btn-outline { width: 100%; }
    .preview-grid, .feature-grid { grid-template-columns: 1fr !important; }
    .picnet-footer-inner {
        width: min(100% - 28px, 1200px);
        min-height: 72px;
        flex-wrap: wrap;
        padding: 14px 0;
    }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}