.concept-page {
    width: min(1440px, calc(100% - 40px));
    margin: 32px auto 72px;
}

.concept-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 270px;
    gap: 28px;
    align-items: stretch;
    padding: 34px 38px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: linear-gradient(135deg, #ffffff 0%, #f5f8fd 100%);
    box-shadow: 0 16px 40px rgba(8, 38, 91, 0.08);
}

.concept-hero h1 {
    margin: 5px 0 12px;
    color: var(--navy);
    font-size: clamp(2rem, 4vw, 3.1rem);
    line-height: 1.05;
}

.concept-hero p:not(.eyebrow) {
    max-width: 860px;
    margin: 0;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.65;
}

.concept-readiness-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 24px;
    border-radius: 14px;
    background: linear-gradient(145deg, #102f68, #365a9f);
    color: #fff;
}

.concept-readiness-card span {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.concept-readiness-card strong {
    margin: 7px 0;
    color: var(--gold);
    font-size: 2.5rem;
}

.concept-readiness-card small {
    color: rgba(255, 255, 255, 0.76);
    line-height: 1.45;
}

.concept-guidance {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 18px 0 26px;
}

.concept-guidance article {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 72px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
}

.concept-guidance strong {
    display: grid;
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 50%;
    background: #eef3fb;
    color: var(--navy);
}

.concept-guidance span {
    color: var(--navy);
    font-size: 0.88rem;
    font-weight: 700;
    line-height: 1.35;
}

.concept-errors {
    margin-bottom: 20px;
}

.concept-form {
    display: grid;
    gap: 18px;
}

.concept-section {
    padding: 30px 32px 34px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 8px 26px rgba(15, 43, 86, 0.045);
}

.concept-section-internal {
    border-color: #e2c36f;
    background: #fffdf6;
}

.concept-section-heading {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid #e8edf5;
}

.concept-section-heading > span {
    display: grid;
    flex: 0 0 46px;
    width: 46px;
    height: 46px;
    place-items: center;
    border-radius: 12px;
    background: var(--navy);
    color: var(--gold);
    font-weight: 900;
}

.concept-section-heading h2 {
    margin: 0 0 4px;
    color: var(--navy);
    font-size: 1.35rem;
}

.concept-section-heading p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.concept-grid {
    display: grid;
    gap: 20px;
}

.concept-grid-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.concept-grid-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.nested-grid {
    gap: 20px;
}

.field-wide,
.field-span-two {
    grid-column: 1 / -1;
}

.concept-form label {
    display: block;
    margin-bottom: 7px;
    color: var(--navy);
    font-size: 0.9rem;
    font-weight: 800;
}

.concept-form input,
.concept-form select,
.concept-form textarea {
    width: 100%;
    border: 1px solid #cfd9e9;
    border-radius: 9px;
    background: #fff;
    color: #10274f;
    font: inherit;
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.concept-form input,
.concept-form select {
    min-height: 46px;
    padding: 10px 12px;
}

.concept-form textarea {
    min-height: 110px;
    padding: 12px 13px;
    resize: vertical;
    line-height: 1.55;
}

.concept-form input:focus,
.concept-form select:focus,
.concept-form textarea:focus {
    outline: none;
    border-color: #3f63a4;
    box-shadow: 0 0 0 3px rgba(48, 83, 145, 0.13);
}

.concept-form input::placeholder,
.concept-form textarea::placeholder {
    color: #94a0b4;
}

.upload-grid {
    margin-top: 8px;
}

.upload-field {
    padding: 18px;
    border: 1px dashed #aebdd3;
    border-radius: 12px;
    background: #f8faff;
}

.upload-field input[type="file"] {
    min-height: auto;
    padding: 10px;
    background: #fff;
}

.upload-field small {
    display: block;
    margin-top: 8px;
    color: var(--muted);
}

.existing-assets {
    margin-bottom: 26px;
}

.existing-assets h3 {
    margin: 0 0 14px;
    color: var(--navy);
}

.asset-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.asset-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
    gap: 7px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 11px;
    background: #fff;
    color: var(--navy);
    text-decoration: none;
}

.asset-card:hover {
    border-color: #879ec5;
    box-shadow: 0 7px 18px rgba(18, 53, 106, 0.08);
}

.asset-card img {
    width: 100%;
    height: 130px;
    border-radius: 8px;
    object-fit: cover;
    background: #eef2f8;
}

.asset-card strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.asset-card small {
    color: var(--muted);
}

.asset-file-icon {
    display: grid;
    height: 130px;
    place-items: center;
    border-radius: 8px;
    background: #eef3fb;
    color: var(--navy);
    font-weight: 900;
    letter-spacing: 0.08em;
}

.concept-submit-bar {
    position: sticky;
    z-index: 20;
    bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 22px;
    border: 1px solid #b9c7da;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 14px 36px rgba(8, 33, 76, 0.15);
    backdrop-filter: blur(10px);
}

.concept-submit-bar > div:first-child {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.concept-submit-bar strong {
    color: var(--navy);
}

.concept-submit-bar span {
    color: var(--muted);
    font-size: 0.9rem;
}

.concept-submit-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.concept-completeness {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: 999px;
    background: #eef3fb;
    color: var(--navy);
    font-size: 0.82rem;
    font-weight: 800;
}

.concept-data-preview {
    margin-top: 18px;
    border-top: 1px solid var(--line);
    padding-top: 16px;
}

.concept-data-preview summary {
    cursor: pointer;
    color: var(--navy);
    font-weight: 800;
}

.concept-preview-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 18px;
    margin-top: 14px;
}

.concept-preview-item {
    padding: 12px;
    border-radius: 9px;
    background: #f7f9fc;
}

.concept-preview-item strong,
.concept-preview-item span {
    display: block;
}

.concept-preview-item strong {
    margin-bottom: 5px;
    color: var(--navy);
    font-size: 0.82rem;
}

.concept-preview-item span {
    color: #52627b;
    white-space: pre-line;
    line-height: 1.45;
}

@media (max-width: 1050px) {
    .concept-guidance,
    .asset-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .concept-grid-three {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .concept-page {
        width: min(100% - 22px, 1440px);
        margin-top: 18px;
    }

    .concept-hero,
    .concept-grid-two,
    .concept-grid-three,
    .concept-preview-grid {
        grid-template-columns: 1fr;
    }

    .concept-hero,
    .concept-section {
        padding: 22px 18px;
    }

    .concept-guidance,
    .asset-grid {
        grid-template-columns: 1fr;
    }

    .concept-submit-bar {
        position: static;
        align-items: stretch;
        flex-direction: column;
    }

    .concept-submit-actions {
        align-items: stretch;
        flex-direction: column-reverse;
    }

    .concept-submit-actions .button {
        width: 100%;
        text-align: center;
    }
}