/* ===== Design System ===== */
:root {
    --bg-primary: #0b1120;
    --bg-secondary: #111827;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-card-hover: rgba(51, 65, 85, 0.8);
    --border-color: rgba(148, 163, 184, 0.15);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --green: #22c55e;
    --green-bg: rgba(34, 197, 94, 0.15);
    --red: #ef4444;
    --red-bg: rgba(239, 68, 68, 0.15);
    --orange: #f97316;
    --orange-bg: rgba(249, 115, 22, 0.15);
    --yellow: #eab308;
    --yellow-bg: rgba(234, 179, 8, 0.15);
    --grey: #475569;
    --grey-bg: rgba(71, 85, 105, 0.2);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --transition: 0.25s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ===== Glass Card ===== */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ===== Login Page ===== */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 60%);
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    animation: fadeInUp 0.6s ease;
}

.login-header { text-align: center; margin-bottom: 32px; }
.login-icon { color: var(--accent); margin-bottom: 16px; }
.login-header h1 { font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.login-subtitle { color: var(--text-secondary); font-size: 14px; }

.login-form { display: flex; flex-direction: column; gap: 20px; }

.input-group { display: flex; flex-direction: column; gap: 6px; }
.input-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group input {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}
.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.input-group input::placeholder { color: var(--text-muted); }

.btn-login {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform 0.15s ease;
    margin-top: 8px;
}
.btn-login:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-login:active { transform: translateY(0); }

.flash-messages { margin-bottom: 20px; }
.flash {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
}
.flash-error {
    background: var(--red-bg);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}
.shake { animation: shake 0.5s ease; }

/* ===== App Layout ===== */
.app-wrapper {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 24px 48px;
}

/* ===== Header ===== */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}
.app-title svg { color: var(--accent); }

.btn-logout {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}
.btn-logout:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
}

/* ===== Controls Panel ===== */
.controls-panel { padding: 24px; margin-bottom: 24px; }
.controls-grid {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1fr 1fr auto;
    gap: 20px;
    align-items: end;
}

.control-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    overflow: hidden;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.upload-content {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    color: var(--text-secondary);
    font-size: 14px;
}
.upload-content svg { flex-shrink: 0; }

.upload-file {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: rgba(59, 130, 246, 0.08);
    color: var(--accent);
    font-size: 14px;
}
.upload-file svg { flex-shrink: 0; }

.btn-clear {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
    transition: color var(--transition);
}
.btn-clear:hover { color: var(--red); }

/* Date Input */
.date-input {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.date-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
/* Fix date input icon color in dark mode */
.date-input::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
    cursor: pointer;
}

/* Select dropdown styling */
select.date-input {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

/* Start Button */
.control-action { display: flex; align-items: flex-end; }
.btn-start {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    min-width: 120px;
    height: 46px;
}
.btn-start:hover:not(:disabled) { background: var(--accent-hover); transform: translateY(-1px); }
.btn-start:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-start.loading { pointer-events: none; }

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===== Error Block ===== */
.error-block {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    margin-bottom: 24px;
    background: var(--red-bg);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--red);
    font-size: 14px;
}
.error-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--red);
    color: white;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* ===== Summary Panel ===== */
.summary-panel { padding: 24px; margin-bottom: 24px; }
.section-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}
.summary-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 16px;
    text-align: center;
}
.summary-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}
.summary-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Broken Shifts ===== */
.broken-panel { padding: 24px; margin-bottom: 24px; }
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}
.section-header:hover .section-title { color: var(--accent); }
.section-header .chevron { transition: transform var(--transition); color: var(--text-secondary); }
.section-header.open .chevron { transform: rotate(180deg); }

.badge {
    background: var(--yellow-bg);
    color: var(--yellow);
    font-size: 12px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 20px;
}

.broken-content { margin-top: 16px; }

/* ===== Tables ===== */
.table-wrapper { overflow-x: auto; }

/* Matrix table wrapper: fixed viewport height with its own scroll */
.matrix-panel .table-wrapper {
    max-height: calc(100vh - 220px);
    min-height: 300px;
    overflow: auto;
}
/* Hide horizontal scrollbar on matrix wrapper — top mirror replaces it */
.matrix-panel .table-wrapper::-webkit-scrollbar:horizontal {
    height: 0;
    display: none;
}

/* ===== Matrix Sticky Top Bar ===== */
.matrix-sticky-top {
    position: sticky;
    top: 0;
    z-index: 15;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    margin: 0 -24px;
    padding: 0 24px;
}
.matrix-project-label {
    padding: 7px 0 5px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.matrix-scroll-mirror {
    overflow-x: scroll;
    overflow-y: hidden;
    height: 14px;
}
.matrix-scroll-mirror::-webkit-scrollbar { height: 8px; }
.matrix-scroll-mirror::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}
.matrix-scroll-mirror::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}
.matrix-scroll-mirror::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }
.matrix-scroll-mirror-inner { height: 1px; }

/* Column header highlight on row hover */
.matrix-table thead th.col-highlight {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent);
    transition: background 0.15s ease, color 0.15s ease;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 13px;
}
.data-table thead th {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.05em;
    padding: 10px 12px;
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 3;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.06);
    color: var(--text-primary);
}
.data-table tbody tr {
    animation: fadeInRow 0.3s ease forwards;
    opacity: 0;
}
.data-table tbody tr:hover { background: rgba(255, 255, 255, 0.03); }

/* ===== Matrix Table ===== */
.matrix-panel { padding: 24px; margin-bottom: 24px; }

.matrix-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 12px;
    color: var(--text-secondary);
}
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}
.legend-dot.green { background: var(--green); }
.legend-dot.red { background: var(--red); }
.legend-dot.orange { background: var(--orange); }
.legend-dot.grey { background: var(--grey); }
.legend-dot.yellow { background: var(--yellow); }

.matrix-table {
    font-size: 12px;
}
.matrix-table thead th {
    text-align: center;
    min-width: 60px;
    white-space: nowrap;
}
.matrix-table thead th:first-child,
.matrix-table thead th:nth-child(2),
.matrix-table thead th:nth-child(3) {
    text-align: left;
    min-width: 80px;
    position: sticky;
    left: 0;
    z-index: 4;
}
.matrix-table thead th:first-child { min-width: 70px; left: 0; }
.matrix-table thead th:nth-child(2) { min-width: 150px; left: 70px; }
.matrix-table thead th:nth-child(3) { min-width: 150px; left: 220px; }

.matrix-table tbody td:first-child,
.matrix-table tbody td:nth-child(2),
.matrix-table tbody td:nth-child(3) {
    position: sticky;
    background: var(--bg-secondary);
    z-index: 2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}
.matrix-table tbody tr:hover td:first-child,
.matrix-table tbody tr:hover td:nth-child(2),
.matrix-table tbody tr:hover td:nth-child(3) {
    background: rgba(30, 41, 59, 0.95);
}
.matrix-table tbody td:first-child { left: 0; font-weight: 600; }
.matrix-table tbody td:nth-child(2) { left: 70px; }
.matrix-table tbody td:nth-child(3) { left: 220px; color: var(--text-secondary); }

.matrix-cell {
    text-align: center;
    padding: 4px 6px !important;
    transition: transform 0.15s ease;
    cursor: default;
    position: relative;
    min-width: 60px;
}
.matrix-cell:hover { transform: scale(1.08); z-index: 5; }

.cell-inner {
    border-radius: 4px;
    padding: 4px 2px;
}

.cell-hours {
    font-size: 10px;
    color: var(--text-secondary);
    line-height: 1.2;
}
.cell-diff {
    font-size: 13px;
    font-weight: 700;
    line-height: 1.3;
}

/* Cell colors */
.cell-green .cell-inner { background: var(--green-bg); }
.cell-green .cell-diff { color: var(--green); }

.cell-red .cell-inner { background: var(--red-bg); }
.cell-red .cell-diff { color: var(--red); }

.cell-orange .cell-inner { background: var(--orange-bg); }
.cell-orange .cell-diff { color: var(--orange); }

.cell-grey .cell-inner { background: var(--grey-bg); }
.cell-grey .cell-diff { color: var(--text-muted); }

.cell-yellow .cell-inner { background: var(--yellow-bg); }
.cell-yellow .cell-diff { color: var(--yellow); }

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRow {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Row animation delays */
.data-table tbody tr:nth-child(1) { animation-delay: 0.02s; }
.data-table tbody tr:nth-child(2) { animation-delay: 0.04s; }
.data-table tbody tr:nth-child(3) { animation-delay: 0.06s; }
.data-table tbody tr:nth-child(4) { animation-delay: 0.08s; }
.data-table tbody tr:nth-child(5) { animation-delay: 0.10s; }
.data-table tbody tr:nth-child(n+6) { animation-delay: 0.12s; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .controls-grid {
        grid-template-columns: 1fr 1fr;
    }
    .control-group:first-child {
        grid-column: 1 / -1;
    }
}
@media (max-width: 600px) {
    .controls-grid {
        grid-template-columns: 1fr;
    }
    .app-wrapper { padding: 0 12px 24px; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }