/* === Минимальный конструктивизм === */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --black: #1a1a1a;
    --red: #cc0000;
    --gray: #999;
    --light: #f5f5f5;
    --white: #fff;
    --border: #e0e0e0;
    --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font);
    color: var(--black);
    background: var(--white);
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Header --- */

.site-header {
    border-bottom: 2px solid var(--black);
    padding: 16px 0;
    margin-bottom: 48px;
}

.header-inner {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
}

.logo {
    text-decoration: none;
    color: var(--black);
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo-mark { color: var(--red); font-size: 18px; }

.logo-text {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.header-org {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray);
}

/* --- Typography --- */

.page-title {
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 3px;
    border-bottom: 2px solid var(--black);
    padding-bottom: 8px;
    margin-bottom: 32px;
}

.section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray);
    margin-bottom: 12px;
}

/* --- Upload --- */

.upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.drop-zone {
    border: 2px dashed var(--border);
    background: var(--light);
    padding: 48px 24px;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.drop-zone:hover,
.drop-zone--dragover { border-color: var(--black); background: var(--white); }
.drop-zone--has-file { border-color: var(--black); border-style: solid; background: var(--white); }

.drop-zone__label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--black);
    margin-bottom: 8px;
}

.drop-zone__example {
    font-size: 11px;
    color: var(--black);
    font-style: italic;
    margin-bottom: 12px;
    word-break: break-all;
}

.drop-zone__hint { font-size: 12px; color: var(--black); font-weight: 700; }
.drop-zone__filename { font-size: 13px; font-weight: 600; margin-top: 8px; }
.drop-zone__input { display: none; }

/* --- Buttons --- */

.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    font-family: var(--font);
    transition: opacity 0.2s;
}

.btn:disabled { opacity: 0.3; cursor: not-allowed; }
.btn--primary { background: var(--black); color: var(--white); }
.btn--primary:hover:not(:disabled) { background: var(--red); }
.btn--secondary { background: var(--light); color: var(--black); }

.upload-actions { text-align: center; margin-bottom: 48px; }

/* --- Loading --- */

.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.95);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
}

.loading-overlay--active { display: flex; }

.loading-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: 160px;
}

.loading-cell {
    width: 44px;
    height: 44px;
    border: 2px solid var(--black);
    animation: morphCell 3s ease-in-out infinite;
}

.loading-cell:nth-child(1) { animation-delay: 0s; }
.loading-cell:nth-child(2) { animation-delay: 0.2s; }
.loading-cell:nth-child(3) { animation-delay: 0.4s; }
.loading-cell:nth-child(4) { animation-delay: 0.6s; }
.loading-cell:nth-child(5) { animation-delay: 0.3s; animation-duration: 2.5s; }
.loading-cell:nth-child(6) { animation-delay: 0.5s; }
.loading-cell:nth-child(7) { animation-delay: 0.8s; }
.loading-cell:nth-child(8) { animation-delay: 0.1s; animation-duration: 3.5s; }
.loading-cell:nth-child(9) { animation-delay: 0.7s; }

@keyframes morphCell {
    0%   { transform: scale(1) rotate(0deg);   border-color: var(--black); }
    25%  { transform: scale(0.8) rotate(90deg); border-color: var(--red); }
    50%  { transform: scale(1.1) rotate(180deg); border-color: var(--black); }
    75%  { transform: scale(0.9) rotate(270deg); border-color: var(--red); }
    100% { transform: scale(1) rotate(360deg);  border-color: var(--black); }
}

.loading-text {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray);
    animation: fadeText 2s ease infinite;
}

@keyframes fadeText {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* --- Summary --- */

.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    background: var(--border);
    margin-bottom: 48px;
}

.summary-item { background: var(--white); padding: 20px 16px; min-width: 0; }

.summary-item__label {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray);
    margin-bottom: 4px;
}

.summary-item__value { font-size: 22px; font-weight: 700; white-space: nowrap; font-variant-numeric: tabular-nums; overflow: hidden; text-overflow: ellipsis; }
.summary-item__value--accent { color: var(--red); }
.summary-item__unit { font-size: 11px; color: var(--gray); margin-left: 4px; }

/* --- Categories --- */

.categories { display: flex; flex-direction: column; gap: 20px; }
.category-block { border-left: 3px solid var(--red); }

.category-header {
    display: grid;
    grid-template-columns: 1fr auto 56px 24px;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: var(--light);
    user-select: none;
}

.category-header:hover { background: var(--border); }

.category-download {
    padding: 4px 12px;
    font-size: 10px;
    background: var(--black);
    color: var(--white);
    border: none;
    transition: background 0.2s;
}

.category-download:hover { background: var(--red); }

.category-header__title {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
}

.category-header__count {
    font-size: 12px;
    font-weight: 700;
    color: var(--red);
    background: var(--white);
    padding: 2px 10px;
    text-align: center;
    cursor: pointer;
}

.category-header__arrow {
    font-size: 10px;
    color: var(--gray);
    transition: transform 0.2s;
    text-align: center;
    cursor: pointer;
}

.category-block--open .category-header__arrow { transform: rotate(90deg); }

.category-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.category-block--open .category-content { max-height: 9999px; }

/* --- Tables --- */

.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }

.data-table th {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray);
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--black);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.data-table th:hover { color: var(--black); }
.data-table th--sorted-asc::after { content: " ▲"; font-size: 8px; }
.data-table th--sorted-desc::after { content: " ▼"; font-size: 8px; }

.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
}

.data-table tr:hover td { background: var(--light); }
.data-table th.amount,
.data-table .amount { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.data-table .difference { color: var(--red); font-weight: 600; }

/* --- Totals Card --- */

.totals-card {
    background: var(--light);
    padding: 24px;
    margin-bottom: 48px;
    border-left: 3px solid var(--black);
}

.totals-card__title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.totals-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }

.totals-section { background: var(--white); padding: 16px; border-top: 2px solid var(--black); }

.totals-section__name {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray);
    margin-bottom: 8px;
}

.totals-row { display: flex; justify-content: space-between; font-size: 13px; padding: 2px 0; }
.totals-row__label { color: var(--gray); }
.totals-row__diff { color: var(--red); font-weight: 600; }

/* --- Misc --- */

.back-link {
    display: inline-block;
    margin: 48px 0;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--gray);
    text-decoration: none;
}

.back-link:hover { color: var(--black); }

.error-message {
    background: var(--light);
    border-left: 3px solid var(--red);
    padding: 16px;
    margin-bottom: 24px;
    font-size: 13px;
    color: var(--red);
    display: none;
}

.error-message--visible { display: block; }