:root {
    --primary: #173763;
    --accent: #d8952d;
    --bg: #edf6ff;
    --card-bg: rgba(255, 255, 255, 0.95);
    --text: #2c3e50;
    --border: #dce6f1;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #edf6ff 0%, #c9def4 100%);
    margin: 0;
    padding-top: 50px; /* Chiều cao topbar */
    display: flex;
    flex-direction: column;
    justify-content: flex-start; /* Luôn bắt đầu từ top */
    align-items: center;
    min-height: 100vh;
    color: var(--text);
    box-sizing: border-box;
}

/* Top Bar Styles */
.id-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: #173763;
    z-index: 1000;
    color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.topbar-inner {
    max-width: 1100px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.topbar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
    font-weight: 800;
    font-size: 18px;
    text-transform: uppercase;
}

.topbar-logo img {
    height: 35px;
}

.topbar-nav {
    display: flex;
    gap: 20px;
}

.topbar-nav a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.topbar-nav a:hover {
    color: #fff;
}

.topbar-nav a.active {
    color: var(--accent);
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 20px;
    margin: 50px 0 100px 0; /* Khoảng cách top cố định */
    transition: all 0.3s;
}

/* Dashboard Hợp Nhất */
.container.has-sidebar {
    max-width: 1100px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(23, 55, 99, 0.15);
    display: flex;
    padding: 0; /* Xóa padding để sidebar chạm mép */
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.8);
    align-items: stretch; /* Đảm bảo sidebar và content cao bằng nhau */
}

/* Sidebar Styles - Gắn liền */
.sidebar {
    width: 280px;
    background: #fcfdfe; /* Màu nền hơi khác để phân biệt */
    padding: 30px 0;
    border-right: 1px solid #eef4fb;
    display: flex;
    flex-direction: column;
}

.user-brief {
    padding: 0 25px 25px;
    border-bottom: 1px solid #f0f4f8;
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.user-avatar i {
    font-size: 45px;
    color: var(--primary);
}

.user-name strong {
    display: block;
    font-size: 16px;
    color: var(--primary);
    text-transform: capitalize;
}

.user-name span.user-status {
    font-size: 11px;
    color: #95a5a6;
    display: flex;
    align-items: center;
    gap: 5px;
}

.sidebar-points-box {
    padding: 0 25px 20px;
    border-bottom: 1px solid #f0f4f8;
    margin-bottom: 10px;
}

.user-points {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, rgba(216, 149, 45, 0.1), rgba(216, 149, 45, 0.05));
    padding: 12px 15px;
    border-radius: 10px;
    border: 1px solid rgba(216, 149, 45, 0.2);
}

.points-label {
    font-size: 12px;
    font-weight: 600;
    color: #856404;
    display: flex;
    align-items: center;
    gap: 8px;
}

.points-label i {
    color: var(--accent);
    font-size: 14px;
}

.points-value strong {
    color: var(--primary);
    font-size: 16px;
    font-weight: 800;
}

.text-success { color: #2ecc71; }

.sidebar-menu {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.sidebar-menu a {
    padding: 15px 25px;
    color: #5d6d7e;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid transparent;
}

.sidebar-menu a:hover {
    background: #f4f8ff;
    color: var(--primary);
}

.sidebar-menu a.active {
    background: #f0f5ff;
    color: var(--primary);
    border-left-color: var(--accent);
}

.menu-divider {
    height: 1px;
    background: #f0f4f8;
    margin: 15px 25px;
}

.logout-item {
    color: #e74c3c !important;
    margin-top: auto;
}

/* Main Content Area - Gắn liền */
.main-content {
    flex: 1;
    padding: 40px;
    background: #fff;
}

/* Xóa style card khi nằm trong main-content để tránh bị lặp khung */
.main-content .card {
    background: transparent;
    box-shadow: none;
    padding: 0;
    border: none;
}

.card {
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(23, 55, 99, 0.15);
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

/* Unified Page Header for Dashboard */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f0f4f8;
}

.page-title-box {
    display: flex;
    align-items: center;
    gap: 15px;
}

.page-header h1 {
    color: var(--primary);
    font-size: 22px;
    margin: 0;
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 1px;
}

.page-header h1::after {
    display: none !important; /* Hide old underline style */
}

/* Small Badge Icon */
.header-icon-box.small {
    width: 45px;
    height: 45px;
    background: linear-gradient(145deg, #ffffff, #e6f0ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #fff;
    box-shadow: 0 5px 15px rgba(23, 55, 99, 0.08);
}

.header-icon-box.small i {
    font-size: 18px;
    color: var(--primary);
}

.header {
    margin-bottom: 35px;
    padding-bottom: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

/* Khối icon kiểu Huy Hiệu (Badge) */
.header-icon-box {
    width: 76px;
    height: 76px;
    background: linear-gradient(145deg, #ffffff, #e6f0ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid #fff;
    position: relative;
    box-shadow:
        0 10px 25px rgba(23, 55, 99, 0.12),
        inset 0 -4px 10px rgba(23, 55, 99, 0.05);
}

/* Vòng trang trí bên ngoài icon */
.header-icon-box::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    opacity: 0.4;
    border-style: dashed;
}

.header-icon-box i {
    font-size: 32px;
    color: var(--primary);
    filter: drop-shadow(2px 2px 3px rgba(0,0,0,0.1));
}

.header h1 {
    color: var(--primary);
    font-size: 26px;
    margin: 0;
    text-transform: uppercase;
    font-weight: 900;
    letter-spacing: 2px;
    position: relative;
    text-align: center;
}

/* Thanh gạch chân trang trí hài hòa */
.header h1::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, transparent, var(--accent), transparent);
    border-radius: 2px;
}

.logo-small {
    height: 60px;
}

.form-group {
    margin-bottom: 15px;
    position: relative;
}

.form-group label {
    display: none;
}

.input-wrapper {
    position: relative;
}

.form-control {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    box-sizing: border-box;
    transition: all 0.3s;
    background: #fff;
}

.input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #a0aec0;
    font-size: 18px;
    transition: all 0.3s;
    pointer-events: none;
    z-index: 2;
}

.form-control:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(216, 149, 45, 0.1);
}

.form-control:focus + .input-icon {
    color: var(--accent);
}

.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-sizing: border-box;
}

.btn-primary {
    background: linear-gradient(to right, #173763, #214d83);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(23, 55, 99, 0.3);
}

.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background: #fdf2f2;
    color: #c81e1e;
    border: 1px solid #f8b4b4;
}

.alert-success {
    background: #f3faf7;
    color: #046c4e;
    border: 1px solid #84e1bc;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.info-item {
    background: #f8fbff;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid #eef4fb;
    text-align: center;
}

.info-item small {
    display: block;
    color: #7f8c8d;
    font-size: 12px;
    margin-bottom: 5px;
}

.info-item strong {
    color: var(--primary);
    font-size: 18px;
}

.tabs {
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
    display: flex;
}

.tab-link {
    padding: 10px 15px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    font-weight: 600;
    color: #7f8c8d;
}

.tab-link.active {
    color: var(--primary);
    border-bottom-color: var(--accent);
}

.logout-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: #e74c3c;
    text-decoration: none;
    font-weight: 600;
}

.footer-note {
    text-align: center;
    font-size: 12px;
    color: #95a5a6;
    margin-top: 20px;
}

/* Validation Styles */
.hp-field { display: none !important; }
.validation-status {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    display: none;
    z-index: 2;
}
.is-valid + .input-icon + .validation-status,
.is-invalid + .input-icon + .validation-status {
    display: block;
}
.is-valid + .input-icon + .validation-status { color: #2ecc71; }
.is-invalid + .input-icon + .validation-status { color: #e74c3c; }

.validation-msg {
    font-size: 11px;
    margin-top: 4px;
    padding-left: 10px;
    display: none; /* Ẩn mặc định */
    color: #e74c3c;
    font-weight: 600;
}

/* Hiển thị khi input con có class .is-invalid */
.form-group:has(.is-invalid) .validation-msg {
    display: block;
}

.is-invalid { border-color: #e74c3c !important; background-color: #fff8f8; }
.is-valid { border-color: #2ecc71 !important; background-color: #f8fff8; }