/* =======================================================
   1. BIẾN SỐ TOÀN CỤC & GIAO DIỆN (DARK/LIGHT MODE)
   ======================================================= */
:root { 
    --primary: #fe2c55; 
    --primary-hover: #e0274b; 
    --bg-color: #f4f7f6; 
    --box-bg: #ffffff; 
    --text-main: #333333; 
    --text-muted: #666666;
    --border: #e0e0e0; 
    --table-header: #f1f3f5;
    --row-hover: #f8f9fa;
}

[data-theme="dark"] {
    --primary: #ff476c; 
    --primary-hover: #ff708c; 
    --bg-color: #121212; 
    --box-bg: #1e1e1e; 
    --text-main: #e0e0e0; 
    --text-muted: #aaaaaa;
    --border: #333333; 
    --table-header: #2c2c2c;
    --row-hover: #2a2a2a;
}

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

body { 
    font-family: 'Segoe UI', Tahoma, sans-serif; 
    background: var(--bg-color); 
    margin: 0; 
    padding: 15px; /* Giảm padding viền ngoài để màn hình rộng hơn */
    color: var(--text-main); 
    transition: background 0.3s, color 0.3s;

    /* FIX GIẬT CHỮ: Kích hoạt render phần cứng trên trình duyệt */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

html { overflow-y: scroll; scroll-behavior: smooth; }

.container { 
    max-width: 100%; /* Đổi từ 1500px thành 100% ĐỂ GIAO DIỆN FULL MÀN HÌNH */
    margin: auto; 
    background: var(--box-bg); 
    padding: 25px 30px; 
    border-radius: 12px; 
    box-shadow: 0 5px 15px rgba(0,0,0,0.05); 
    width: 100%;
    transition: background 0.3s;
}

.header { text-align: center; margin-bottom: 30px; position: relative; }
.header h2 { color: var(--primary); margin: 0; font-size: 26px; text-transform: uppercase; }

.theme-toggle {
    position: absolute; right: 0; top: 0;
    background: transparent; border: 1px solid var(--border);
    color: var(--text-main); font-size: 20px;
    padding: 5px 10px; border-radius: 20px; cursor: pointer; transition: 0.3s;
}
.theme-toggle:hover { background: var(--border); }

/* =======================================================
   2. UI COMPONENTS CHUNG (BUTTONS, INPUTS, LOGIN)
   ======================================================= */
.login-box { text-align: center; margin-top: 50px; padding: 40px; border: 1px dashed var(--border); border-radius: 8px; background: var(--table-header); max-width: 500px; margin-left: auto; margin-right: auto;}
.login-box input { padding: 12px 15px; width: 280px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; outline: none; margin: 0; background: var(--box-bg); color: var(--text-main); }
.login-box button { padding: 12px 24px; background: var(--primary); color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold; transition: all 0.2s; margin: 0;}

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; font-size: 13px; font-weight: 600; border-radius: 6px; border: none; cursor: pointer; transition: all 0.2s; white-space: nowrap; flex-shrink: 0;}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 4px 8px rgba(254,44,85,0.2);}
.btn-warning { background: #ffc107; color: #333; }
.btn-warning:hover { background: #e0a800; transform: translateY(-1px); }
.btn-danger { background: #dc3545; color: white; }
.btn-danger:hover { background: #c82333; transform: translateY(-1px); }
.btn-success { background: #28a745; color: white; }
.btn-success:hover { background: #218838; transform: translateY(-1px); }
.btn-secondary { background: #6c757d; color: white; }
.btn-secondary:hover { background: #5a6268; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

.search-bar { display: flex; align-items: center; background: var(--bg-color); border: 1px solid var(--border); border-radius: 6px; padding: 0 10px; overflow: hidden; width: 100%; flex: 1; min-width: 150px; max-width: 350px;}
.search-bar input { border: none; background: transparent; padding: 10px; width: 100%; outline: none; font-size: 13px; color: var(--text-main);}

.empty-row { text-align: center; padding: 40px !important; color: var(--text-muted); font-size: 14px; background: rgba(0,0,0,0.01);}
.empty-state { text-align: center; padding: 50px; color: var(--text-muted); display: flex; flex-direction: column; align-items: center; }
.empty-state span { font-size: 40px; margin-bottom: 10px; }
.status-msg { text-align: center; margin-top: 15px; color: #dc3545; font-weight: 500; }

/* =======================================================
   3. TRANG ADMIN (QUẢN TRỊ VIÊN)
   ======================================================= */
.card { background: var(--box-bg); border: 1px solid var(--border); border-radius: 12px; padding: 25px; margin-bottom: 20px; box-shadow: 0 4px 12px rgba(0,0,0,0.03); height: max-content; }
.card-title { font-size: 16px; font-weight: bold; color: var(--primary); margin-top: 0; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; border-bottom: 1px dashed var(--border); padding-bottom: 15px;}
.flex-row { display: flex; gap: 25px; flex-wrap: wrap; align-items: flex-start;}
#appArea { display: none; }

/* Form Trái Sticky - Bật GPU rendering để chống giật UI */
.form-card {
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: scroll;
    overflow-x: hidden;
    transform: translateZ(0);
    will-change: transform;
}
.form-card::-webkit-scrollbar { width: 6px; }
.form-card::-webkit-scrollbar-track { background: transparent; }
.form-card::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 15px; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label { font-weight: 600; font-size: 13px; color: var(--text-main); }
.form-group input:not([type="checkbox"]), .form-group select { 
    padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; 
    background: var(--bg-color); color: var(--text-main); outline: none; transition: 0.2s; font-size: 13px;
}
.form-group input:not([type="checkbox"]):focus, .form-group select:focus { 
    border-color: var(--primary); box-shadow: 0 0 0 3px rgba(254, 44, 85, 0.1); background: var(--box-bg);
}

/* CƠ CHẾ THU GỌN / MỞ RỘNG (Grid 0fr -> 1fr) SIÊU MƯỢT */
.form-group-collapse {
    display: grid;
    grid-template-rows: 0fr; 
    opacity: 0;
    margin-bottom: 0 !important;
    transition: grid-template-rows 0.35s ease-out, opacity 0.3s ease-out, margin-bottom 0.35s ease-out;
}
.form-group-collapse.show {
    grid-template-rows: 1fr; 
    opacity: 1;
    margin-bottom: 15px !important; 
}
.collapse-inner {
    min-height: 0; 
    overflow: hidden; 
    display: flex;
    flex-direction: column;
    gap: 5px;
}

/* Các box chọn checkbox */
.role-checkbox-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; padding: 15px; background: rgba(0,0,0,0.02); border: 1px solid var(--border); border-radius: 8px; }
.role-checkbox-item { 
    display: flex; align-items: center; gap: 8px; font-size: 13px; cursor: pointer; padding: 5px; border-radius: 4px; transition: 0.2s; color: var(--text-main); font-weight: 500;
    user-select: none; 
}
.role-checkbox-item:hover { background: rgba(0,0,0,0.05); }
.role-checkbox-item input { width: 16px; height: 16px; cursor: pointer; margin: 0; accent-color: var(--primary); flex-shrink: 0;}

.scroll-checkbox-list { 
    max-height: 180px; 
    overflow-y: scroll;
    overflow-x: hidden;
    border: 1px solid var(--border); 
    padding: 12px; 
    border-radius: 8px; 
    background: var(--bg-color); 
    display: flex; 
    flex-direction: column;
    gap: 5px;
}
.scroll-checkbox-list > div { width: 100%; }

/* Bảng */
.table-scroll { max-height: 550px; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; background: var(--box-bg);}
.table-scroll th { position: sticky; top: 0; background: var(--table-header); box-shadow: 0 2px 2px -1px rgba(0,0,0,0.1); z-index: 10; padding: 12px 15px; text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px;}
.table-scroll td { padding: 12px 15px; font-size: 13px; }

/* Tabs quản trị */
.admin-tabs { display: flex; gap: 10px; margin-bottom: 25px; border-bottom: 1px solid var(--border); padding-bottom: 15px; overflow-x: auto;}
.tab-btn { background: var(--table-header); border: 1px solid var(--border); padding: 10px 20px; font-size: 14px; font-weight: 600; color: var(--text-muted); cursor: pointer; border-radius: 20px; transition: 0.3s; white-space: nowrap; }
.tab-btn:hover { color: var(--primary); background: rgba(254, 44, 85, 0.05); border-color: rgba(254, 44, 85, 0.2);}
.tab-btn.active { color: white; background: var(--primary); border-color: var(--primary); box-shadow: 0 4px 10px rgba(254,44,85,0.3);}
.tab-content { display: none; animation: fadeInTab 0.3s ease; }
.tab-content.active { display: block; }
@keyframes fadeInTab { from { opacity: 0; } to { opacity: 1; } }

/* Components khác */
.upload-box { border: 2px dashed #17a2b8; padding: 25px 20px; text-align: center; border-radius: 8px; margin-bottom: 20px; background: rgba(23, 162, 184, 0.05); transition: 0.3s;}
.upload-box input[type="file"] { display: none; }
.toggle-group { display: inline-flex; background: var(--table-header); border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.toggle-btn { padding: 10px 18px; font-size: 13px; font-weight: bold; background: transparent; border: none; color: var(--text-muted); cursor: pointer; transition: 0.3s; white-space: nowrap; flex-shrink: 0;}
.toggle-btn.active { background: var(--primary); color: white; }

/* =======================================================
   4. TRANG INDEX (BÁO CÁO TIKTOK)
   ======================================================= */
.report-tabs { display: none; gap: 10px; margin-bottom: 25px; border-bottom: 2px solid var(--border); padding-top: 10px; }
.r-tab-btn { background: transparent; border: none; padding: 12px 25px; font-size: 15px; font-weight: bold; color: var(--text-muted); cursor: pointer; border-radius: 8px 8px 0 0; transition: 0.3s; margin-bottom: -2px; border-bottom: 3px solid transparent; display: flex; align-items: center; gap: 8px; }
.r-tab-btn:hover { color: var(--primary); background: var(--table-header); }
.r-tab-btn.active { color: var(--primary); border-bottom: 3px solid var(--primary); background: var(--box-bg); }

.toolbar { display: none; flex-direction: column; margin-bottom: 10px; background: var(--table-header); padding: 20px; border-radius: 8px; border: 1px solid var(--border); }
.toolbar-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; border-bottom: 1px dashed var(--border); padding-bottom: 15px;}
.record-count { font-weight: 600; color: white; font-size: 14px; background: var(--primary); padding: 6px 12px; border-radius: 20px; }
.filter-grid { display: flex; flex-wrap: wrap; gap: 15px; width: 100%; align-items: flex-end; }
.filter-item { display: flex; flex-direction: column; flex: 1; min-width: 140px;}
.filter-item label { font-size: 12px; font-weight: bold; color: var(--text-muted); margin-bottom: 5px; }
.filter-item select, .filter-item input { padding: 9px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; outline: none; background: var(--box-bg); color: var(--text-main); }
.btn-quick { background: var(--box-bg); color: var(--text-main); padding: 7px 14px; font-size: 13px; font-weight: bold; border-radius: 6px; border: 1px solid var(--border); cursor: pointer; transition: 0.2s; }
.btn-toggle-adv { background: #6c757d; color: white; padding: 9px 15px; border-radius: 6px; border: none; cursor: pointer; font-size: 12px; font-weight: bold; height: 37px;}

.kpi-grid { display: none; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-bottom: 20px; }
.kpi-card { background: var(--box-bg); padding: 25px 20px; border-radius: 10px; border: 1px solid var(--border); box-shadow: 0 4px 6px rgba(0,0,0,0.02); text-align: center; }
.kpi-title { font-size: 13px; font-weight: bold; color: var(--text-muted); margin-bottom: 10px; }
.kpi-value { font-size: 32px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.kpi-trend { font-size: 13px; font-weight: 600; padding: 5px 10px; border-radius: 20px; display: inline-block; }
.trend-up { background: rgba(40, 167, 69, 0.15); color: #28a745; }
.trend-down { background: rgba(220, 53, 69, 0.15); color: #dc3545; }
.trend-neutral { background: var(--table-header); color: var(--text-muted); }

.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; width: 100%; }
.dashboard-grid .chart-container:first-child { grid-column: 1 / -1; }
.chart-container { background: var(--box-bg); padding: 15px; border-radius: 8px; border: 1px solid var(--border); height: 480px; position: relative; box-shadow: 0 2px 4px rgba(0,0,0,0.02); width: 100%; min-width: 0; }

.table-wrapper { max-height: 50vh; overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; display: none; width: 100%; background: var(--box-bg); margin-bottom: 20px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; text-align: left; }
th, td { border-bottom: 1px solid var(--border); padding: 14px 10px; white-space: nowrap; }
th { background-color: var(--table-header); color: var(--text-main); font-weight: 600; position: sticky; top: 0; z-index: 10; box-shadow: 0 2px 2px -1px rgba(0,0,0,0.1); }
tbody tr:hover { background-color: var(--row-hover); }

@media (max-width: 992px) { .dashboard-grid { grid-template-columns: 1fr; } }

/* =======================================================
   5. MODAL, LOADER & TOASTS
   ======================================================= */
.loader-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 9999; justify-content: center; align-items: center; flex-direction: column; color: white; }
.spinner { width: 50px; height: 50px; border: 5px solid rgba(255,255,255,0.3); border-radius: 50%; border-top-color: var(--primary); animation: spin 1s ease-in-out infinite; margin-bottom: 15px; }
@keyframes spin { to { transform: rotate(360deg); } }

.modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 10000; justify-content: center; align-items: center; padding: 20px;}
.modal-content { background: var(--box-bg); width: 100%; max-width: 800px; max-height: 85vh; border-radius: 12px; display: flex; flex-direction: column; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,0.2); animation: zoomIn 0.2s ease;}
.modal-header { padding: 15px 20px; background: var(--table-header); border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center;}
.modal-header h3 { margin: 0; color: var(--primary); font-size: 16px; display: flex; align-items: center; gap: 8px;}
.close-btn { background: transparent; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); padding: 0; line-height: 1;}
.close-btn:hover { color: var(--primary); }
.modal-body { padding: 0; overflow-y: auto; flex: 1; }

#toastContainer { position: fixed; top: 20px; right: 20px; z-index: 99999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--box-bg); color: var(--text-main); padding: 12px 20px; border-radius: 8px; border-left: 4px solid var(--primary); box-shadow: 0 4px 12px rgba(0,0,0,0.15); font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 10px; animation: slideIn 0.3s ease; min-width: 280px; }
.toast.error { border-left-color: #dc3545; }
.toast.warning { border-left-color: #ffc107; }

@keyframes slideIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes zoomIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }

/* =======================================================
   THANH TÌM KIẾM TRONG DANH SÁCH CHECKBOX
   ======================================================= */
.mini-search {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-main);
    outline: none;
    font-size: 12px;
    margin-bottom: 5px;
    transition: 0.2s;
}
.mini-search:focus {
    border-color: var(--primary);
    background: var(--box-bg);
}