/* CSS Design System for Key Shop Web App */
:root {
    /* Color Palette */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-glow: rgba(37, 99, 235, 0.4);
    --secondary: #10b981;
    --secondary-glow: rgba(16, 185, 129, 0.3);
    
    --bg-main: #f8fafc;
    --bg-sidebar: rgba(255, 255, 255, 0.8);
    --bg-card: #ffffff;
    --bg-input: #f1f5f9;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-on-primary: #ffffff;
    
    --border-color: #e2e8f0;
    --border-glow: rgba(255, 255, 255, 0.6);
    
    /* Layout & Styling Values */
    --sidebar-width: 280px;
    --border-radius-lg: 20px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.03);
    --shadow-glow: 0 10px 30px rgba(37, 99, 235, 0.15);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Overrides */
[data-theme="dark"] {
    --bg-main: #0b0f19;
    --bg-sidebar: rgba(17, 24, 39, 0.85);
    --bg-card: #1f2937;
    --bg-input: #374151;
    
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    
    --border-color: #374151;
    --border-glow: rgba(255, 255, 255, 0.05);
    
    --shadow-glow: 0 10px 30px rgba(37, 99, 235, 0.25);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    min-height: 100vh;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Decorative blur backgrounds */
.bg-blob {
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    filter: blur(160px);
    z-index: -1;
    opacity: 0.12;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.bg-blob-1 {
    background-color: var(--primary);
    top: -100px;
    right: -100px;
}

.bg-blob-2 {
    background-color: #d946ef;
    bottom: -150px;
    left: -100px;
}

[data-theme="dark"] .bg-blob {
    opacity: 0.2;
}

/* ==========================================================================
   AUTHENTICATION SCREEN (LOGIN / REGISTER)
   ========================================================================== */
.auth-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, #e0e7ff 0%, #e8e5f7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

[data-theme="dark"] .auth-wrapper {
    background: linear-gradient(135deg, #090d16 0%, #111026 100%);
}

.auth-wrapper.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.auth-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 420px;
    border-radius: var(--border-radius-lg);
    padding: 40px 30px;
    transform: translateY(0);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-theme="dark"] .auth-card {
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-logo {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.auth-subtitle {
    color: var(--text-muted);
    font-size: 14px;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
}

.form-group input {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    color: var(--text-main);
    font-size: 15px;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus {
    border-color: var(--primary);
    background-color: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.auth-btn {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: var(--text-on-primary);
    border: none;
    padding: 14px;
    border-radius: var(--border-radius-md);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 14px var(--primary-glow);
    margin-top: 10px;
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
    filter: brightness(1.05);
}

.auth-btn:active {
    transform: translateY(0);
}

.auth-switch {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 20px;
}

.auth-switch-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.auth-switch-link:hover {
    text-decoration: underline;
}

/* ==========================================================================
   APP LAYOUT (SIDEBAR + MAIN CONTENT)
   ========================================================================== */
.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.app-container.visible {
    opacity: 1;
    visibility: visible;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--bg-sidebar);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid var(--border-color);
    padding: 30px 24px;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.theme-toggle:hover {
    background-color: var(--bg-input);
    color: var(--text-main);
}

.sidebar-section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin: 24px 0 12px 10px;
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.nav-item:hover {
    background-color: var(--bg-input);
    color: var(--text-main);
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: var(--text-on-primary);
    box-shadow: 0 8px 16px -4px var(--primary-glow);
}

.nav-item.active:hover {
    transform: none;
}

.nav-icon {
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
}

/* Telegram Box & User Profile in Sidebar */
.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.btn-discord {
    background: rgba(88, 101, 242, 0.08);
    color: #5865F2;
    border: 1px solid rgba(88, 101, 242, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    border-radius: var(--border-radius-md);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-discord:hover {
    background-color: #5865F2;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(88, 101, 242, 0.4);
    transform: translateY(-1px);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 4px;
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    border-radius: 50%;
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info {
    flex-grow: 1;
    overflow: hidden;
}

.username {
    font-weight: 700;
    font-size: 14px;
    color: var(--text-main);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

.logout-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

.logout-btn:hover {
    color: #ef4444;
}

/* ==========================================================================
   MAIN VIEWPORT STYLING
   ========================================================================== */
.main-content {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    min-height: 100vh;
    padding: 40px 50px;
    max-width: 1200px;
    width: calc(100% - var(--sidebar-width));
    transition: var(--transition);
}

/* Top Nav & Header */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
}

.page-title-group h2 {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-title-group p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 4px;
}

.wallet-badge {
    position: fixed;
    top: 30px;
    right: 40px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1.5px solid rgba(234, 179, 8, 0.4);
    color: #b45309;
    font-weight: 800;
    font-size: 16px;
    padding: 8px 18px;
    border-radius: 50px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05), 0 0 15px rgba(234, 179, 8, 0.1);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 200;
    transition: var(--transition);
}

[data-theme="dark"] .wallet-badge {
    background: rgba(31, 41, 55, 0.85);
    border: 1.5px solid rgba(234, 179, 8, 0.5);
    color: #fbbf24;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25), 0 0 20px rgba(234, 179, 8, 0.2);
}

.wallet-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(234, 179, 8, 0.2);
    border-color: #ca8a04;
}

.coin-icon-img {
    width: 28px;
    height: 28px;
    object-fit: cover;
    border-radius: 50%;
    animation: coinSpin 4s infinite linear;
    box-shadow: 0 0 8px rgba(234, 179, 8, 0.4);
}

@keyframes coinSpin {
    0% { transform: rotateY(0deg); }
    100% { transform: rotateY(360deg); }
}

/* Tab Panels */
.tab-panel {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   TASKS TAB VIEW (NHIỆM VỤ)
   ========================================================================== */
.tasks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.task-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.task-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.task-banner-placeholder {
    height: 140px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 36px;
}

.task-banner-nhapma {
    background: linear-gradient(135deg, #10b981 0%, #047857 100%);
}

.task-banner-link4m {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.task-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(8px);
    padding: 6px 12px;
    border-radius: 50px;
    color: #fff;
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255,255,255,0.1);
}

.task-body {
    padding: 24px;
}

.task-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.task-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 20px;
}

/* Stats Group in Task Card */
.task-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 20px;
}

.stat-item {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 10px 4px;
    text-align: center;
}

.stat-label {
    font-size: 10px;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
}

.reward-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(234, 179, 8, 0.08);
    border: 1px dashed rgba(234, 179, 8, 0.3);
    color: #ca8a04;
    padding: 10px;
    border-radius: var(--border-radius-md);
    font-weight: 800;
    font-size: 15px;
    margin-bottom: 20px;
}

.reward-bar-coins {
    margin-left: 6px;
    font-size: 16px;
}

.btn-task {
    width: 100%;
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    padding: 14px;
    border-radius: var(--border-radius-md);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 10px var(--primary-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-task:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 6px 14px var(--primary-glow);
    transform: translateY(-1px);
}

/* Active Code Verification State */
.verification-box {
    display: none; /* Toggled by JS */
    border: 1px solid rgba(37, 99, 235, 0.3);
    background-color: rgba(37, 99, 235, 0.03);
    border-radius: var(--border-radius-md);
    padding: 16px;
    margin-top: 15px;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.verification-box p {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.4;
}

.verification-inputs {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.verification-inputs input {
    flex-grow: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: var(--border-radius-sm);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    outline: none;
}

.verification-inputs input:focus {
    border-color: var(--primary);
}

.btn-verify {
    background-color: var(--secondary);
    color: #ffffff;
    border: none;
    padding: 10px 18px;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.btn-verify:hover {
    filter: brightness(1.05);
}

.btn-cancel-task {
    width: 100%;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 8px;
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
}

.btn-cancel-task:hover {
    background-color: rgba(239, 68, 68, 0.05);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.2);
}

/* ==========================================================================
   SHOP TAB VIEW (FREE FIRE)
   ========================================================================== */
.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.shop-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.shop-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.shop-banner {
    height: 180px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.shop-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    padding: 6px 14px;
    border-radius: 50px;
    color: #fff;
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 10px rgba(37,99,235,0.3);
}

.shop-body {
    padding: 24px;
    text-align: center;
}

.shop-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-main);
}

.shop-price {
    font-size: 24px;
    font-weight: 800;
    color: #eab308;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.shop-price-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-muted);
}

.shop-info-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 24px;
    font-size: 13px;
    color: var(--text-muted);
}

.shop-info-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-buy {
    width: 100%;
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    padding: 14px;
    border-radius: var(--border-radius-md);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-buy:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 6px 20px var(--primary-glow);
    transform: translateY(-1px);
}

.btn-buy:disabled {
    background-color: var(--border-color);
    color: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

/* ==========================================================================
   HISTORY TAB VIEW (LỊCH SỬ)
   ========================================================================== */
.history-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.history-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.table-wrapper {
    overflow-x: auto;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 14px 16px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    letter-spacing: 0.5px;
}

td {
    padding: 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

tr:last-child td {
    border-bottom: none;
}

.status-badge {
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 700;
}

.status-badge.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
}

.key-display-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-input);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    width: fit-content;
}

.key-text {
    font-family: monospace;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
}

.btn-copy-mini {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-copy-mini:hover {
    color: var(--primary);
    transform: scale(1.1);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 14px;
}

/* ==========================================================================
   ADMIN PANEL VIEW (QUẢN LÝ)
   ========================================================================== */
.admin-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.admin-subtitle {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.restock-textarea {
    width: 100%;
    height: 120px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--border-radius-md);
    color: var(--text-main);
    font-family: monospace;
    font-size: 13px;
    outline: none;
    resize: vertical;
    margin-bottom: 16px;
    transition: var(--transition);
}

.restock-textarea:focus {
    border-color: var(--primary);
    background-color: var(--bg-card);
}

.admin-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-admin {
    background-color: var(--primary);
    color: #fff;
    border: none;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.btn-admin:hover {
    filter: brightness(1.05);
}

.btn-admin-danger {
    background-color: #ef4444;
}

.btn-admin-secondary {
    background-color: var(--text-muted);
}

/* ==========================================================================
   TOAST NOTIFICATION & RESPONSIVE LAYOUT
   ========================================================================== */
.toast-notice {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--text-main);
    color: var(--bg-main);
    padding: 16px 24px;
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 14px;
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
}

.toast-notice.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-notice.success-type {
    background-color: var(--secondary);
    color: #ffffff;
}

.toast-notice.error-type {
    background-color: #ef4444;
    color: #ffffff;
}

/* Modal Popup */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 480px;
    padding: 30px;
    text-align: center;
    transform: scale(0.9);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.modal-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.modal-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 24px;
}

.modal-key-box {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--border-radius-md);
    font-family: monospace;
    font-weight: 700;
    font-size: 20px;
    letter-spacing: 1px;
    margin-bottom: 24px;
    color: var(--primary);
    position: relative;
}

.btn-close-modal {
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.btn-close-modal:hover {
    filter: brightness(1.05);
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    body {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
    }
    
    .sidebar-header {
        margin-bottom: 20px;
    }
    
    .nav-menu {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 8px;
        gap: 12px;
    }
    
    .nav-item {
        white-space: nowrap;
        padding: 8px 16px;
    }
    
    .nav-item:hover {
        transform: none;
    }
    
    .sidebar-footer {
        display: none; /* Hide profile and Telegram on mobile top bar to save space */
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 30px 20px;
    }
    
    .wallet-badge {
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 200;
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        padding: 6px 14px;
        font-size: 14px;
    }
}

@media (max-width: 576px) {
    .tasks-grid, .shop-grid {
        grid-template-columns: 1fr;
    }
    
    .top-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
}

/* Action Buttons in Admin Tables */
.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.action-btn.btn-coins {
    background-color: #f59e0b; /* Yellow/Amber */
    box-shadow: 0 4px 10px rgba(245, 158, 11, 0.2);
}

.action-btn.btn-coins:hover {
    background-color: #d97706;
    transform: translateY(-1px);
}

.action-btn.btn-reset {
    background-color: #3b82f6; /* Blue */
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.2);
}

.action-btn.btn-reset:hover {
    background-color: #2563eb;
    transform: translateY(-1px);
}

.action-btn.btn-delete {
    background-color: #ef4444; /* Red */
    box-shadow: 0 4px 10px rgba(239, 68, 68, 0.2);
}

.action-btn.btn-delete:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
}

.admin-controls-group {
    display: flex;
    gap: 8px;
    align-items: center;
}