:root {
    color-scheme: light;
    --background: #f3f6f8;
    --surface: #ffffff;
    --text: #17212b;
    --muted: #637080;
    --border: #dce3e8;
    --primary: #145c5a;
    --primary-hover: #0d4847;
    --danger: #ad2e24;
    --danger-hover: #88251e;
    --success: #176b45;
    --shadow: 0 12px 32px rgba(23, 33, 43, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

.container {
    width: min(1080px, calc(100% - 32px));
    margin: 0 auto;
}

.page-header {
    padding: 48px 0 84px;
    background: linear-gradient(135deg, #103f4b, #176b64);
    color: #ffffff;
}

.page-header h1 {
    margin: 4px 0 8px;
    font-size: clamp(2rem, 5vw, 3.25rem);
    letter-spacing: -0.04em;
}

.page-header p:last-child {
    max-width: 720px;
    margin: 0;
    color: #dcebea;
}

.eyebrow,
.step {
    margin: 0;
    color: #83d2c9;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.page-content {
    display: grid;
    gap: 24px;
    margin-top: -44px;
    padding-bottom: 56px;
}

.card {
    padding: clamp(24px, 4vw, 36px);
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.section-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 24px;
}

.section-heading h2 {
    margin: 4px 0 0;
    font-size: 1.35rem;
}

.section-heading > p {
    max-width: 520px;
    margin: 0;
    color: var(--muted);
}

.step {
    color: var(--primary);
}

label,
.file-field span {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 700;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 16px;
}

input[type="file"],
textarea {
    width: 100%;
    border: 1px solid #b9c5cd;
    border-radius: 10px;
    background: #ffffff;
    color: var(--text);
    font: inherit;
}

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

input[type="file"]::file-selector-button {
    margin-right: 12px;
    padding: 8px 12px;
    border: 0;
    border-radius: 7px;
    background: #e7f1f0;
    color: var(--primary);
    font-weight: 700;
    cursor: pointer;
}

textarea {
    min-height: 112px;
    padding: 12px 14px;
    resize: vertical;
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(20, 92, 90, 0.25);
    outline-offset: 2px;
}

button {
    min-height: 42px;
    padding: 10px 18px;
    border: 0;
    border-radius: 9px;
    background: var(--primary);
    color: #ffffff;
    font: inherit;
    font-weight: 750;
    cursor: pointer;
}

button:hover:not(:disabled) {
    background: var(--primary-hover);
}

button:disabled {
    cursor: wait;
    opacity: 0.65;
}

.button-secondary {
    border: 1px solid var(--border);
    background: #ffffff;
    color: var(--primary);
}

.button-secondary:hover:not(:disabled) {
    background: #edf5f4;
}

.button-danger {
    background: var(--danger);
}

.button-danger:hover:not(:disabled) {
    background: var(--danger-hover);
}

.message {
    min-height: 24px;
    margin: 14px 0 0;
    color: var(--muted);
}

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

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

.contracts-list {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.contract-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #fafcfc;
}

.contract-item h3 {
    margin: 0 0 4px;
    font-size: 1rem;
    overflow-wrap: anywhere;
}

.contract-meta {
    margin: 0;
    color: var(--muted);
    font-size: 0.85rem;
    overflow-wrap: anywhere;
}

.form-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    margin-top: 12px;
}

.counter {
    color: var(--muted);
    font-size: 0.8rem;
}

.answer-panel {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.answer-panel h3 {
    margin: 0 0 12px;
    font-size: 1rem;
}

.answer-text {
    padding: 18px;
    border-left: 4px solid var(--primary);
    border-radius: 0 8px 8px 0;
    background: #f3f8f7;
    white-space: pre-wrap;
}

.sources-panel {
    margin-top: 28px;
}

details {
    margin-top: 10px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: #ffffff;
}

summary {
    padding: 13px 15px;
    font-weight: 700;
    cursor: pointer;
}

.source-text {
    margin: 0;
    padding: 0 15px 15px;
    color: #3f4c59;
    white-space: pre-wrap;
}

.empty-state {
    padding: 24px;
    border: 1px dashed #b9c5cd;
    border-radius: 10px;
    color: var(--muted);
    text-align: center;
}

@media (max-width: 700px) {
    .page-header {
        padding-top: 36px;
    }

    .section-heading,
    .form-row,
    .contract-item {
        align-items: stretch;
        flex-direction: column;
        grid-template-columns: 1fr;
    }

    .section-heading {
        display: flex;
    }

    .section-heading-inline .button-secondary,
    .contract-item button {
        width: 100%;
    }
}