:root {
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    background-color: #f7f7f8;
    color: #1f2933;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 960px;
    margin: 40px auto 64px;
    padding: 32px;
    background-color: #ffffff;
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
    border-radius: 16px;
}

h1 {
    text-align: center;
    color: #1a73e8;
    margin-bottom: 24px;
}

.upload-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.dropzone {
    position: relative;
    min-height: 200px;
    border: 2px dashed #1a73e8;
    text-align: center;
    padding: 40px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.08), rgba(26, 115, 232, 0));
    transition: border-color 0.3s ease, transform 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
}

.dropzone p {
    margin: 0;
    font-size: 16px;
}

.dropzone small {
    color: #4a5568;
}

.dropzone.dragover {
    border-color: #0b5394;
    transform: scale(1.01);
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.12), rgba(26, 115, 232, 0.04));
}

.hidden-input {
    display: none;
}

.primary-button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 14px 20px;
    background-color: #1a73e8;
    color: #ffffff;
    border: none;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.primary-button:hover {
    background-color: #0b5394;
}

.primary-button:disabled {
    background-color: #9bbdf7;
    cursor: not-allowed;
}

.secondary-button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 999px;
    border: 1px solid rgba(26, 115, 232, 0.5);
    background-color: rgba(26, 115, 232, 0.08);
    color: #1a73e8;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.secondary-button:hover,
.secondary-button:focus-visible {
    background-color: rgba(26, 115, 232, 0.16);
    color: #0b5394;
    box-shadow: 0 16px 30px rgba(15, 23, 42, 0.12);
    outline: none;
}

.secondary-button:focus-visible {
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.35);
}

.secondary-button:active {
    transform: translateY(1px);
}

.secondary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    box-shadow: none;
}

.notification {
    margin-top: 16px;
    padding: 14px 18px;
    border-radius: 12px;
    background-color: rgba(26, 115, 232, 0.12);
    color: #0b5394;
    display: none;
}

.notification.is-visible {
    display: block;
}

.notification.error {
    background-color: rgba(220, 38, 38, 0.12);
    color: #b91c1c;
}

.notification.success {
    background-color: rgba(22, 163, 74, 0.12);
    color: #15803d;
}

#file-info {
    margin-top: 16px;
    padding: 16px;
    border-radius: 12px;
    background-color: #f1f5f9;
    line-height: 1.6;
}

#results {
    margin-top: 32px;
    display: grid;
    gap: 32px;
}

section h2 {
    margin-bottom: 16px;
    color: #1a202c;
}

.stats-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.stat-card {
    padding: 18px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.08), rgba(26, 115, 232, 0));
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-card span {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #4a5568;
}

.stat-card strong {
    font-size: 24px;
    color: #1a202c;
}

.card-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
    padding: 20px;
    border-radius: 14px;
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card h3 {
    margin: 0;
    font-size: 18px;
    color: #1a73e8;
}

.card p {
    margin: 0;
}

.card a {
    color: #1a73e8;
    text-decoration: none;
}

.card a:hover {
    text-decoration: underline;
}

.bar-chart {
    display: grid;
    gap: 12px;
}

.bar-item {
    display: grid;
    gap: 8px;
}

.bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: #1f2933;
}

.bar {
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(26, 115, 232, 0.75), rgba(26, 115, 232, 1));
}

body.is-modal-open {
    overflow: hidden;
}

.modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: transparent;
    z-index: 1000;
}

.modal.is-visible {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(2px);
}

.modal-dialog {
    position: relative;
    background: #ffffff;
    border-radius: 18px;
    box-shadow: 0 32px 80px rgba(15, 23, 42, 0.25);
    width: min(1040px, 92vw);
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 1;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 28px;
    border-bottom: 1px solid #e2e8f0;
    gap: 12px;
}

.modal-header h2 {
    margin: 0;
    font-size: 20px;
    color: #1a202c;
}

.modal-body {
    padding: 0 28px 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    height: 100%;
}

.modal-description {
    margin: 16px 0 0;
    color: #475569;
    font-size: 14px;
}

.modal-gallery {
    flex: 1;
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    overflow-y: auto;
    padding: 16px 4px;
    overscroll-behavior: contain;
}

.modal-gallery-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 0;
}

.modal-gallery img {
    width: 100%;
    border-radius: 14px;
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.2);
    cursor: zoom-in;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: #0f172a10;
    transform-origin: center center;
}

.modal-gallery img:focus-visible {
    outline: 3px solid rgba(26, 115, 232, 0.45);
    outline-offset: 4px;
}

.modal-gallery img.is-zoomed {
    transform: scale(1.6);
    box-shadow: 0 24px 50px rgba(15, 23, 42, 0.3);
    cursor: zoom-out;
    z-index: 1;
}

.modal-gallery img.has-error {
    cursor: not-allowed;
    box-shadow: none;
    background: #fee2e2;
    color: #b91c1c;
}

.modal-gallery figcaption {
    font-size: 13px;
    color: #475569;
    word-break: break-word;
}

.modal-close {
    border: none;
    background: none;
    color: #64748b;
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s ease;
}

.modal-close:hover,
.modal-close:focus-visible {
    color: #1a73e8;
    outline: none;
}

.empty-state {
    text-align: center;
    color: #64748b;
    padding: 24px;
    border: 1px dashed #cbd5f5;
    border-radius: 12px;
}

@media (max-width: 640px) {
    .container {
        margin: 16px;
        padding: 24px;
    }

    .dropzone {
        padding: 24px;
    }

    .modal-dialog {
        width: 94vw;
        max-height: 90vh;
        border-radius: 14px;
    }

    .modal-header {
        padding: 16px 20px;
    }

    .modal-body {
        padding: 0 20px 20px;
    }

    .modal-gallery {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 16px;
    }
}