/* =====================================
   BIẾN MÀU SẮC TOÀN CỤC
===================================== */
:root {
    --primary-blue: #2563eb;
    --primary-green: #10b981;
    --light-bg: #f1f5f9;
    --glass-bg: rgba(255, 255, 255, 0.18);
    --glass-border: rgba(255, 255, 255, 0.35);
    --text-dark: #1e293b;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.08);
    --radius-lg: 20px;
    --radius-xl: 28px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", "Poppins", Roboto, Arial, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
}

/* =====================================
   TRANG ĐĂNG NHẬP (INDEX.HTML)
===================================== */
.login-page {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    align-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 45%, #064e3b 100%);
    background-size: 200% 200%;
    animation: gradientShift 12s ease infinite;
    position: relative;
    padding: 20px;
    min-height: 100vh;
    width: 100%;
    overflow-y: auto;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.login-page::before,
.login-page::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.35;
    z-index: 0;
}

.login-page::before {
    width: 350px;
    height: 350px;
    background: var(--primary-green);
    top: -80px;
    left: -80px;
    animation: floatBlob 10s ease-in-out infinite;
}

.login-page::after {
    width: 400px;
    height: 400px;
    background: var(--primary-blue);
    bottom: -100px;
    right: -100px;
    animation: floatBlob 14s ease-in-out infinite reverse;
}

@keyframes floatBlob {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, 30px) scale(1.1); }
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    padding: 48px 36px;
    animation: fadeSlideUp 0.8s ease forwards;
    opacity: 0;
}

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-logo {
    width: 72px;
    height: 72px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: 18px;
    font-size: 32px;
    color: #fff;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
    animation: pulseLogo 3s ease-in-out infinite;
}

@keyframes pulseLogo {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}

.login-title {
    color: #fff;
    font-weight: 800;
    letter-spacing: 1px;
}

.login-subtitle {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

.login-card .form-control {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    border-radius: 14px;
    padding: 12px 16px;
}

.login-card .form-control::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.login-card .form-control:focus {
    background: rgba(255, 255, 255, 0.18);
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    color: #fff;
}

.btn-fit-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border: none;
    color: #fff;
    font-weight: 600;
    border-radius: 14px;
    padding: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-fit-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.45);
    color: #fff;
}

.input-group-glass {
    position: relative;
}

.input-group-glass .toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
}

/* =====================================
   LAYOUT CHUNG TRANG USER / ADMIN
===================================== */
.app-navbar {
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    padding: 14px 0;
}

.app-navbar .brand-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    color: #fff;
    font-size: 20px;
}

.app-navbar .brand-text {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-dark);
}

.btn-logout {
    border-radius: 12px;
    font-weight: 600;
}

/* =====================================
   HERO SECTION (USER)
===================================== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1d4ed8 50%, var(--primary-green) 100%);
    border-radius: var(--radius-xl);
    color: #fff;
    padding: 36px 32px;
    margin: 24px 0;
    position: relative;
    overflow: hidden;
    animation: fadeSlideUp 0.6s ease forwards;
}

.hero-section::after {
    content: "";
    position: absolute;
    width: 240px;
    height: 240px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    right: -60px;
    top: -60px;
}

.hero-section h2 {
    font-weight: 800;
}

.hero-stat {
    text-align: center;
}

.hero-stat .value {
    font-size: 1.9rem;
    font-weight: 800;
}

.hero-stat .label {
    font-size: 0.85rem;
    opacity: 0.85;
}

/* =====================================
   DASHBOARD CARDS THỐNG KÊ
===================================== */
.stat-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 22px;
    height: 100%;
    border: 1px solid rgba(0,0,0,0.03);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: fadeSlideUp 0.6s ease forwards;
    opacity: 0;
    animation-fill-mode: forwards;
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
}

.stat-card .icon-circle {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    margin-bottom: 14px;
}

.icon-blue { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.icon-green { background: linear-gradient(135deg, #34d399, #10b981); }
.icon-orange { background: linear-gradient(135deg, #fbbf24, #f59e0b); }
.icon-purple { background: linear-gradient(135deg, #a78bfa, #7c3aed); }

.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-dark);
}

.stat-card .stat-label {
    color: #64748b;
    font-size: 0.9rem;
}

/* Stagger animation cho các stat card */
.stat-card:nth-child(1) { animation-delay: 0.05s; }
.stat-card:nth-child(2) { animation-delay: 0.15s; }
.stat-card:nth-child(3) { animation-delay: 0.25s; }
.stat-card:nth-child(4) { animation-delay: 0.35s; }

/* =====================================
   BỘ LỌC TÌM KIẾM
===================================== */
.filter-bar {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 18px;
    margin: 24px 0;
}

.filter-bar .form-control,
.filter-bar .form-select {
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.filter-bar .form-control:focus,
.filter-bar .form-select:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* =====================================
   WORKOUT CARDS
===================================== */
.workout-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(0,0,0,0.03);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    height: 100%;
    animation: fadeSlideUp 0.5s ease forwards;
    opacity: 0;
}

.workout-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.15);
}

.workout-card .workout-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.workout-card:hover .workout-img {
    transform: scale(1.06);
}

.workout-card .card-body {
    padding: 18px;
}

.workout-card .muscle-badge {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-blue);
    font-weight: 600;
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 0.78rem;
}

.workout-card .workout-meta {
    color: #64748b;
    font-size: 0.85rem;
}

/* =====================================
   PROGRESS BAR TIẾN ĐỘ
===================================== */
.progress-section {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 24px;
    margin: 24px 0;
}

.progress-section .progress {
    height: 14px;
    border-radius: 999px;
    background: #e2e8f0;
    overflow: hidden;
}

.progress-section .progress-bar {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    transition: width 1.2s ease;
    border-radius: 999px;
}

.progress-item {
    margin-bottom: 18px;
}

.progress-item .progress-label {
    display: flex;
    justify-content: space-between;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

/* =====================================
   SKELETON LOADING
===================================== */
.skeleton {
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: skeletonShine 1.5s infinite;
    border-radius: 8px;
}

@keyframes skeletonShine {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.skeleton-img {
    width: 100%;
    height: 180px;
    border-radius: 0;
}

.skeleton-line {
    height: 14px;
}

/* =====================================
   SPINNER LOADING
===================================== */
.spinner-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 0;
}

/* =====================================
   ADMIN DASHBOARD
===================================== */
.admin-table-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 22px;
    margin: 24px 0;
}

.admin-table-card table img {
    width: 56px;
    height: 56px;
    object-fit: cover;
    border-radius: 10px;
}

.admin-table-card .table thead th {
    border-bottom: 2px solid #e2e8f0;
    color: #475569;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table-card .table tbody tr {
    transition: background 0.2s ease;
}

.admin-table-card .table tbody tr:hover {
    background: rgba(37, 99, 235, 0.04);
}

.btn-action {
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 0.85rem;
}

/* =====================================
   FORM VALIDATION
===================================== */
.error-feedback {
    color: #dc2626;
    font-size: 0.8rem;
    margin-top: 4px;
    display: none;
}

.error-feedback.d-block {
    display: block;
}

/* =====================================
   ANIMATION DÙNG CHUNG
===================================== */
.fade-in {
    animation: fadeSlideUp 0.6s ease forwards;
}

.slide-down {
    display: none;
}

/* =====================================
   RESPONSIVE
===================================== */
@media (max-width: 768px) {
    .hero-stat .value { font-size: 1.4rem; }
    .login-card { padding: 32px 24px; }
    .hero-section { padding: 24px 20px; }
}

@media (max-width: 576px) {
    .stat-card .stat-value { font-size: 1.4rem; }
}



/* =====================================
   DARK MODE OVERRIDES
===================================== */
[data-theme="dark"] {
    /* Cập nhật các biến CSS toàn cục */
    --light-bg: #0f172a;
    --text-dark: #f8fafc;
    --glass-bg: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .app-navbar,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .filter-bar,
[data-theme="dark"] .workout-card,
[data-theme="dark"] .progress-section,
[data-theme="dark"] .admin-table-card,
[data-theme="dark"] .modal-content,
[data-theme="dark"] .bg-white {
    background-color: #1e293b !important;
    border-color: #334155 !important;
    color: var(--text-dark) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3) !important;
}

[data-theme="dark"] .text-muted {
    color: #94a3b8 !important;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: #0f172a;
    border-color: #334155;
    color: #f8fafc;
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: #1e293b;
    color: #f8fafc;
}

[data-theme="dark"] .input-group-text {
    background-color: #1e293b !important;
    border-color: #334155;
    color: #f8fafc;
}

[data-theme="dark"] .table {
    color: #f8fafc;
}

[data-theme="dark"] .table thead th {
    border-bottom-color: #334155;
    color: #cbd5e1;
}

[data-theme="dark"] .table tbody tr:hover {
    background: rgba(37, 99, 235, 0.15);
}

[data-theme="dark"] .table {
    --bs-table-bg: transparent;
    --bs-table-color: #f8fafc;
    --bs-table-border-color: #334155;
}
[data-theme="dark"] .table th,
[data-theme="dark"] .table td {
    background-color: transparent !important;
    color: #f8fafc !important;
    border-bottom-color: #334155 !important;
}
[data-theme="dark"] .table tbody tr:hover td {
    background-color: rgba(255, 255, 255, 0.05) !important;
}
[data-theme="dark"] .pagination .page-link {
    background-color: #1e293b !important;
    border-color: #334155 !important;
    color: #cbd5e1 !important;
}
[data-theme="dark"] .pagination .page-item.active .page-link {
    background-color: var(--primary-blue) !important;
    border-color: var(--primary-blue) !important;
    color: #fff !important;
}
[data-theme="dark"] .pagination .page-item.disabled .page-link {
    background-color: #0f172a !important;
    color: #64748b !important;
    border-color: #334155 !important;
}
[data-theme="dark"] .nav-pills .nav-link {
    color: #cbd5e1;
}

[data-theme="dark"] .nav-pills .nav-link.active {
    background-color: var(--primary-blue) !important;
    color: #ffffff !important;
}
/* =====================================
   TỐI ƯU HÓA MÀU SẮC GIAO DIỆN TỐI (DARK MODE)
===================================== */

/* 1. Sửa màu chữ của Tiêu đề và Label */
[data-theme="dark"] .form-label,
[data-theme="dark"] .modal-title {
    color: #f8fafc !important;
}

/* 2. Sửa màu nền và màu chữ của các ô Input nhập liệu */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: #1e293b !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: #0f172a !important;
    border-color: var(--primary-blue) !important;
    color: #ffffff !important;
    box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.25) !important;
}

[data-theme="dark"] .form-control::placeholder {
    color: #94a3b8 !important;
    opacity: 1;
}

[data-theme="dark"] .bg-light,
[data-theme="dark"] .bg-white {
    background-color: #1e293b !important;
    border-color: #334155 !important;
    color: #f8fafc !important;
}

[data-theme="dark"] .table-light th {
    background-color: #0f172a !important;
    color: #f8fafc !important;
    border-bottom-color: #334155 !important;
}

[data-theme="dark"] .table {
    --bs-table-color: #f8fafc;
    --bs-table-bg: transparent;
    --bs-table-border-color: #334155;
    color: #f8fafc !important;
}

[data-theme="dark"] .text-dark {
    color: #f8fafc !important;
}

[data-theme="dark"] #exerciseSelectList tr:hover td {
    background-color: rgba(255, 255, 255, 0.05) !important;
}

[data-theme="dark"] #exerciseSelectList tr.table-primary td {
    background-color: rgba(37, 99, 235, 0.3) !important;
    color: #ffffff !important;
    border-color: transparent !important;
}