/* Strict Apple HIG */
:root {
    /* Light Mode */
    --bg-main: #F2F2F7;
    --bg-card: #FFFFFF;
    --text-primary: #000000;
    --text-secondary: #8E8E93;
    --border-color: #E5E5EA;
    
    /* HIG System Colors */
    --sys-blue: #007AFF;
    --sys-green: #34C759;
    --sys-red: #FF3B30;
    --sys-purple: #AF52DE;
    --sys-gray: #8E8E93;

    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --border-radius-card: 16px;
    --border-radius-sm: 10px;
    
    --font-main: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --transition: 0.2s ease-in-out;
}

[data-theme="dark"] {
    /* Dark Mode */
    --bg-main: #000000;
    --bg-card: #1C1C1E;
    --text-primary: #FFFFFF;
    --text-secondary: #EBEBF5;
    --border-color: #38383A;
    
    --sys-blue: #0A84FF;
    --sys-green: #30D158;
    --sys-red: #FF453A;
    --sys-purple: #BF5AF2;
    --sys-gray: #98989D;

    --card-shadow: none;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: var(--font-main); }

body { background-color: var(--bg-main); color: var(--text-primary); min-height: 100vh; overflow-x: hidden; -webkit-font-smoothing: antialiased; transition: background-color var(--transition), color var(--transition); }

.app-container { display: flex; min-height: 100vh; }
.app-container.no-sidebar .sidebar { display: none; }

.main-content {
    flex: 1; padding: 32px 48px; display: flex; flex-direction: column; gap: 24px;
    height: 100vh; overflow-y: auto;
}

.card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-card);
    box-shadow: var(--card-shadow);
    padding: 24px;
    transition: background-color var(--transition), box-shadow var(--transition);
}

.top-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.page-title { font-size: 32px; font-weight: 700; letter-spacing: -0.5px; color: var(--text-primary); }
.page-subtitle { color: var(--sys-gray); font-size: 15px; margin-top: 4px; font-weight: 400; }

.header-actions { display: flex; align-items: center; gap: 16px; }

.theme-toggle {
    background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-primary);
    border-radius: 50%; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
    font-size: 20px; cursor: pointer; box-shadow: var(--card-shadow); transition: var(--transition);
}
.theme-toggle:hover { transform: scale(1.05); }

.user-profile img { border-radius: 50%; width: 44px; height: 44px; object-fit: cover; border: 1px solid var(--border-color); }

/* Summaries */
.summary-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.summary-card { display: flex; flex-direction: column; gap: 4px; padding: 20px; }

.card-icon-box { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.card-icon {
    width: 36px; height: 36px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center; font-size: 20px; color: #fff;
}
.card-icon.global { background-color: var(--sys-gray); }
.card-icon.blue { background-color: var(--sys-blue); }
.card-icon.purple { background-color: var(--sys-purple); }

.card-title { font-size: 14px; color: var(--sys-gray); font-weight: 600; text-transform: uppercase; letter-spacing: -0.2px; }
.card-value { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; color: var(--text-primary); }
.card-meta-text { font-size: 14px; color: var(--sys-gray); font-weight: 500;}

.perf-badge { display: flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600; margin-top: 4px; }
.perf-badge i { font-size: 18px; }
.perf-badge.positive { color: var(--sys-green); }
.perf-badge.negative { color: var(--sys-red); }

/* Progress bar (Solid HIG) */
.progress-bar {
    width: 100%; height: 6px; background-color: var(--border-color);
    border-radius: 3px; overflow: hidden; margin-top: 12px;
}
.progress { height: 100%; border-radius: 3px; }
.progress.blue { background-color: var(--sys-blue); }
.progress.purple { background-color: var(--sys-purple); }

/* Shifts Grid */
.shift-cards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.shift-card { display: flex; flex-direction: column; gap: 12px; padding: 20px; border-radius: var(--border-radius-card); }

.shift-header {
    display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 600; letter-spacing: -0.3px;
    color: var(--text-primary); padding-bottom: 12px; border-bottom: 1px solid var(--border-color);
}
.shift-header i { font-size: 20px; color: var(--sys-blue); }

.shift-section { display: flex; flex-direction: column; gap: 6px; }
.shift-section-title { font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--sys-gray); font-weight: 600; margin-bottom: 4px; margin-top: 8px; }

.shift-row {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 14px; padding: 10px 12px; background-color: var(--bg-card);
    border-radius: var(--border-radius-sm); border: 1px solid var(--border-color);
}
.shift-row span:first-child { color: var(--text-primary); font-weight: 500; }
.shift-row span:last-child { font-weight: 600; color: var(--sys-green); }
.shift-row small { font-size: 11px; color: var(--sys-gray); font-weight: 400; margin-left: 6px; }

.shift-row.negative span:last-child { color: var(--sys-red); }
.shift-row.neutral { justify-content: center; background-color: transparent; border: 1px dashed var(--border-color); }
.shift-row.neutral span { color: var(--sys-gray); font-style: italic;}

.shift-divider { height: 1px; background-color: var(--border-color); margin: 8px 0; }
.shift-total { display: flex; justify-content: space-between; align-items: center; font-size: 16px; color: var(--text-primary); font-weight: 600; }
.shift-total strong { font-size: 20px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.5px;}

.shift-compare { margin-top: auto; padding-top: 12px; }
.compare-box {
    display: flex; flex-direction: column; gap: 6px; padding: 12px;
    background-color: var(--bg-main); border-radius: var(--border-radius-sm); border: 1px solid var(--border-color); text-align: center;
}
.compare-label { font-size: 12px; color: var(--sys-gray); font-weight: 500; }
.compare-values { display: flex; justify-content: center; align-items: center; gap: 8px; }
.compare-abs { font-size: 15px; font-weight: 600; }
.compare-percent { font-size: 15px; font-weight: 600; }
.positive-text { color: var(--sys-green); display: flex; align-items: center; gap: 2px;}
.negative-text { color: var(--sys-red); display: flex; align-items: center; gap: 2px;}

/* Charts Area */
.charts-area { display: flex; flex-direction: column; gap: 20px; margin-bottom: 20px; }
.charts-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.chart-card h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.5px; margin-bottom: 2px; }
.chart-subtitle { font-size: 14px; color: var(--sys-gray); margin-bottom: 16px; font-weight: 500;}

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--sys-gray); }

/* Apexcharts overrides */
.apexcharts-text { fill: var(--sys-gray) !important; font-family: var(--font-main) !important; font-weight: 500; }
.apexcharts-tooltip {
    background: var(--bg-card) !important; border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important; border-radius: var(--border-radius-sm) !important; box-shadow: var(--card-shadow) !important;
}
.apexcharts-tooltip-title { background: var(--bg-main) !important; border-bottom: 1px solid var(--border-color) !important; font-weight: 600 !important; font-family: var(--font-main) !important;}
.apexcharts-gridline { stroke: var(--border-color) !important; stroke-dasharray: 4; }
.apexcharts-legend-text { color: var(--sys-gray) !important; font-family: var(--font-main) !important; }

/* Responsive Grid */
@media (max-width: 1400px) {
    .shift-cards-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
    .shift-cards-grid { grid-template-columns: 1fr; }
    .summary-cards { grid-template-columns: 1fr; }
    .charts-row { grid-template-columns: 1fr; }
    .main-content { padding: 24px; }
}