:root {
    --bg: #f3f5f4;
    --surface: #ffffff;
    --surface-muted: #eef1ef;
    --text: #243028;
    --muted: #667069;
    --border: #d4dbd6;
    --border-strong: #b8c2bb;
    --green: #0d5c3b;
    --green-deep: #08462d;
    --green-soft: #e6f1eb;
    --green-mid: #1a7a52;
    --error: #b42318;
    --error-bg: #fef3f2;
    --error-border: #f04438;
    --shadow: 0 8px 22px rgba(20, 40, 30, 0.06);
    --radius: 12px;
    --font-ui: "Segoe UI", "Helvetica Neue", Tahoma, sans-serif;
    --font-brand: "Segoe UI Semibold", "Segoe UI", Tahoma, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-ui);
    background: var(--bg);
    background-image: url('/static/assets/hero-bg.png');
    background-position: center top;
    background-size: cover;
    background-repeat: no-repeat;
    color: var(--text);
    line-height: 1.5;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.page {
    max-width: 1120px;
    margin: 0 auto;
    padding: 16px 20px 40px;
}

.topbar {
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.brand {
    margin: 0;
    font-family: var(--font-brand);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--green);
    line-height: 1.2;
}

.tagline {
    margin: 2px 0 0;
    color: var(--muted);
    font-size: 0.88rem;
}

.hero {
    margin-bottom: 14px;
}

.hero h1 {
    margin: 0 0 6px;
    font-size: clamp(1.35rem, 2vw, 1.6rem);
    font-weight: 700;
    color: var(--text);
    line-height: 1.25;
}

.lead {
    margin: 0;
    max-width: 40rem;
    color: #08462d;
    font-weight: 600;
    font-size: 0.95rem;
    text-shadow: none;
    background: rgba(255,255,255,0.92);
    padding: 3px 8px;
    border-radius: 6px;
}

.layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 12px;
    padding: 14px 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.sidebar-label {
    margin: 0 0 8px;
    padding: 0 8px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.categories {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.category-btn {
    width: 100%;
    padding: 9px 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--text);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.category-btn:hover,
.category-btn.is-active {
    background: var(--green-soft);
    color: var(--green);
}

.main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-section {
    padding: 16px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.car-fields {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 12px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.field-wide {
    margin-bottom: 12px;
}

label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
}

input,
select {
    width: 100%;
    padding: 10px 11px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
    color: var(--text);
    font: inherit;
    font-size: 0.93rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

select:disabled,
input:disabled {
    background: var(--surface-muted);
    color: var(--muted);
    cursor: not-allowed;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(13, 92, 59, 0.16);
}

.field.has-error input,
.field.has-error select {
    border-color: var(--error-border);
    background: #fff;
    box-shadow: none;
}

.field-error {
    margin: 0;
    font-size: 0.78rem;
    color: var(--error);
}

#searchButton,
.btn-primary {
    width: 100%;
    padding: 12px 14px;
    border: 0;
    border-radius: 8px;
    background: var(--green);
    color: #ffffff;
    font: inherit;
    font-size: 0.96rem;
    font-weight: 650;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease;
}

#searchButton:hover:not(:disabled),
.btn-primary:hover:not(:disabled) {
    background: var(--green-deep);
}

#searchButton:active:not(:disabled),
.btn-primary:active:not(:disabled) {
    transform: translateY(1px);
}

#searchButton:disabled {
    opacity: 0.72;
    cursor: wait;
}

.results-section {
    min-height: 0;
}

.dialog {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.bubble {
    max-width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
}

.bubble-user {
    align-self: flex-end;
    max-width: min(520px, 100%);
    background: var(--green-soft);
    border-color: #c5ddd0;
}

.bubble-ai {
    align-self: stretch;
    background: var(--surface);
}

.bubble-label {
    margin: 0 0 4px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.bubble-text {
    margin: 0;
    white-space: normal;
}

.bubble-loading {
    color: var(--muted);
}

.bubble-loading .dots::after {
    content: "";
    display: inline-block;
    width: 1.2em;
    animation: dots 1.2s steps(4, end) infinite;
}

.status-banner {
    margin: 0;
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 0.93rem;
}

.status-banner.empty {
    background: #f8f6f0;
    border-color: #e4ddcf;
}

.status-banner.error {
    background: var(--error-bg);
    border-color: #f9c6c1;
    color: var(--error);
}

.parts-grid {
    display: grid;
    gap: 12px;
}

.part-card {
    padding: 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.part-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-1px);
}

.part-card-header {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 10px;
}

.part-icon {
    flex: 0 0 auto;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    background: var(--green-soft);
    color: var(--green);
    font-size: 1.1rem;
}

.part-card h3 {
    margin: 0 0 2px;
    font-size: 1.02rem;
    color: var(--green);
    line-height: 1.3;
}

.part-category {
    margin: 0;
    font-size: 0.84rem;
    color: var(--muted);
}

.part-meta {
    display: grid;
    grid-template-columns: 7.5rem 1fr;
    gap: 4px 10px;
    margin: 0;
    font-size: 0.9rem;
}

.part-meta dt {
    margin: 0;
    font-weight: 600;
    color: var(--muted);
}

.part-meta dd {
    margin: 0;
    color: var(--text);
}

.fitment-note {
    margin-top: 10px;
    padding: 9px 11px;
    border-radius: 8px;
    background: var(--surface-muted);
    border-left: 3px solid var(--green-mid);
    font-size: 0.86rem;
    color: var(--text);
}

.fitment-note strong {
    color: var(--green-deep);
}

.part-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.part-actions button {
    padding: 7px 11px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.84rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.part-actions button:hover {
    border-color: var(--green);
    color: var(--green);
    background: var(--green-soft);
}

.part-actions .btn-vin {
    border-color: var(--green);
    color: var(--green);
    background: var(--green-soft);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%) translateY(12px);
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--green-deep);
    color: #fff;
    font-size: 0.9rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 50;
}

.toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.modal[hidden] {
    display: none;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    padding: 20px;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(20, 32, 26, 0.45);
}

.modal-dialog {
    position: relative;
    width: min(420px, 100%);
    padding: 22px;
    background: var(--surface);
    border-radius: 14px;
    border: 1px solid var(--border);
    box-shadow: 0 24px 60px rgba(10, 30, 20, 0.2);
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 12px;
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--muted);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
}

.modal-close:hover {
    background: var(--surface-muted);
    color: var(--text);
}

.modal-dialog h2 {
    margin: 0 0 8px;
    font-size: 1.15rem;
    color: var(--green);
}

.modal-lead {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 0.9rem;
}

.modal-dialog input {
    margin-bottom: 10px;
}

.vin-message {
    margin: 0 0 12px;
    padding: 10px 12px;
    border-radius: 8px;
    background: #fff;
    color: var(--green-deep);
    font-size: 0.9rem;
}

.modal-actions {
    display: flex;
    gap: 10px;
}

.modal-actions .btn-primary,
.modal-actions .btn-secondary {
    width: auto;
    flex: 1;
}

.btn-secondary {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 0.93rem;
    font-weight: 600;
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--surface-muted);
}

@keyframes dots {
    0% { content: ""; }
    25% { content: "."; }
    50% { content: ".."; }
    75% { content: "..."; }
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .sidebar {
        position: static;
        padding: 12px;
    }

    .categories {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 4px;
    }
}

@media (max-width: 800px) {
    .page {
        padding: 12px 14px 32px;
    }

    .car-fields {
        grid-template-columns: 1fr;
    }

    .part-meta {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .part-meta dt {
        margin-top: 6px;
    }

    .part-meta dt:first-child {
        margin-top: 0;
    }
}

@media (max-width: 520px) {
    .categories {
        grid-template-columns: 1fr;
    }

    .modal-actions {
        flex-direction: column;
    }
}






.topbar {
    margin-bottom: 18px;
    padding: 12px 0 14px;
    border-bottom: 1px solid rgba(255,255,255,0.55);
    text-align: center;
    background: rgba(255,255,255,0.90);
    border-radius: 10px;
}

.brand {
    margin: 0;
    font-family: var(--font-brand);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--green-deep);
    line-height: 1.1;
}

.tagline {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 600;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 14px;
}

.info-card {
    padding: 14px 16px;
    background: rgba(255,255,255,0.94);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.info-card h2 {
    margin: 0 0 5px;
    color: var(--green-deep);
    font-size: 1rem;
    font-weight: 750;
}

.info-card p {
    margin: 0;
    color: var(--text);
    font-size: 0.86rem;
    line-height: 1.4;
}

@media (max-width: 800px) {
    .info-cards {
        grid-template-columns: 1fr;
    }
}
.hero {
    margin: 0 0 14px;
    padding: 18px 24px;
    text-align: center;
    background: rgba(0, 91, 58, 0.82);
    border-radius: 10px;
}

.hero h1 {
    margin: 0 0 6px;
    color: #fff;
}

.hero .lead {
    margin: 0 auto;
    color: #fff;
    background: transparent;
    padding: 0;
    max-width: 60rem;
}