:root {
    --background: #f5f7fa;
    --surface: #ffffff;
    --primary: #245b78;
    --primary-dark: #183f55;
    --text: #24313a;
    --muted: #667680;
    --border: #dce4e8;
    --shadow: 0 10px 30px rgba(25, 55, 70, 0.08);
    --focus: #c46737;
    --error: #9f2d2d;
    --error-background: #fdecec;
    --success: #256342;
    --success-background: #eaf7ef;
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: column;
    color: var(--text);
    background: var(--background);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    padding: 28px 0;
    color: #ffffff;
    background: var(--primary);
}

.site-header .container {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    color: #ffffff;
    font-size: 1.45rem;
    font-weight: 700;
    text-decoration: none;
}

.site-header p {
    margin: 0;
    color: rgba(255, 255, 255, 0.82);
}

main {
    flex: 1;
    padding: 64px 0 80px;
}

.intro {
    max-width: 720px;
    margin-bottom: 40px;
}

.intro h1 {
    margin: 0 0 12px;
    color: var(--primary-dark);
    font-size: clamp(2rem, 5vw, 3.25rem);
    line-height: 1.15;
}

.intro p {
    margin: 0;
    color: var(--muted);
    font-size: 1.1rem;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.tool-card {
    display: block;
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow);
    color: inherit;
    text-decoration: none;
    transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.tool-card:hover,
.tool-card:focus-visible {
    border-color: var(--primary);
    box-shadow: 0 14px 34px rgba(25, 55, 70, 0.13);
    transform: translateY(-2px);
}

.tool-card h2 {
    margin: 0 0 10px;
    color: var(--primary-dark);
    font-size: 1.3rem;
}

.tool-card p {
    margin: 0 0 24px;
    color: var(--muted);
}

.tool-link {
    display: inline-block;
    border: 0;
    padding: 10px 16px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font: inherit;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.tool-link:hover {
    background: var(--primary-dark);
}

.tool-link:disabled,
.secondary-button:disabled {
    color: var(--muted);
    background: #edf1f3;
    border-color: #edf1f3;
    cursor: not-allowed;
}

.secondary-button {
    display: inline-block;
    border: 1px solid var(--primary);
    padding: 9px 15px;
    border-radius: 8px;
    color: var(--primary-dark);
    background: var(--surface);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.secondary-button:hover {
    color: #ffffff;
    background: var(--primary);
}

.breadcrumb {
    margin-bottom: 24px;
}

.breadcrumb a {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.tool-form,
.result-section {
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.tool-form {
    display: grid;
    gap: 20px;
}

.tool-form.compact {
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

label {
    display: grid;
    gap: 8px;
    color: var(--primary-dark);
    font-weight: 700;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 11px 12px;
    color: var(--text);
    background: #ffffff;
    font: inherit;
}

textarea {
    min-height: 260px;
    resize: vertical;
}

input[type="file"] {
    padding: 10px;
}

input:focus,
textarea:focus,
button:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(196, 103, 55, 0.3);
    outline-offset: 2px;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.form-message {
    margin: 0;
    padding: 12px 14px;
    border-radius: 8px;
    font-weight: 700;
    white-space: pre-line;
}

.form-message.error {
    color: var(--error);
    background: var(--error-background);
}

.form-message.success {
    color: var(--success);
    background: var(--success-background);
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.workflow-step {
    position: relative;
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.workflow-step h2 {
    margin: 0 0 18px;
    color: var(--primary-dark);
    font-size: 1.3rem;
}

.workflow-step h3 {
    margin: 0 0 8px;
    color: var(--primary-dark);
    font-size: 1.05rem;
}

.step-number {
    display: inline-grid;
    width: 34px;
    height: 34px;
    margin-bottom: 14px;
    place-items: center;
    border-radius: 50%;
    color: #ffffff;
    background: var(--primary);
    font-weight: 700;
}

.help-text {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.download-panel {
    margin-top: 22px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.download-panel p {
    margin: 0 0 14px;
    color: var(--muted);
    overflow-wrap: anywhere;
}

.result-section {
    margin-top: 28px;
}

.section-heading-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.result-section h2,
.result-section h3 {
    margin-top: 0;
    color: var(--primary-dark);
}

.result-grid {
    display: grid;
    grid-template-columns: minmax(220px, 0.8fr) minmax(280px, 1.2fr);
    gap: 28px;
}

.pseudonym-list {
    margin: 0;
    padding-left: 24px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--primary-dark);
    background: #f0f5f7;
}

.site-footer {
    padding: 22px 0;
    border-top: 1px solid var(--border);
    color: var(--muted);
    background: var(--surface);
    font-size: 0.9rem;
}

.site-footer p {
    margin: 0;
}

@media (max-width: 650px) {
    .site-header .container {
        display: block;
    }

    .site-header p {
        margin-top: 6px;
    }

    main {
        padding-top: 44px;
    }

    .form-grid,
    .result-grid,
    .workflow-grid {
        grid-template-columns: 1fr;
    }

    .section-heading-row {
        display: block;
    }

    .section-heading-row form {
        margin-top: 16px;
    }
}