/**
 * VPN Bot Admin Panel - UI Enhancements
 * Dark Mode, Toast Notifications, Animations, Loading States
 */

/* ============================================================================
   DARK MODE SUPPORT
   ============================================================================ */

:root {
    /* Light Mode Colors (default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);

    /* Accent Colors */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #10b981;
    --success-hover: #059669;
    --warning: #f59e0b;
    --warning-hover: #d97706;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --info: #3b82f6;
    --info-hover: #2563eb;
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-tertiary: #2d2d2d;
    --text-primary: #e5e5e5;
    --text-secondary: #a3a3a3;
    --text-muted: #737373;
    --border-color: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
}

/* ============================================================================
   DARK MODE TOGGLE BUTTON
   ============================================================================ */

.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 18px;
    color: var(--text-primary);
    margin-right: 8px;
}

.theme-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle .fa-sun {
    display: none;
}

.theme-toggle .fa-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .fa-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .fa-moon {
    display: none;
}

/* ============================================================================
   TOAST NOTIFICATION SYSTEM
   ============================================================================ */

.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 400px;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 24px var(--shadow-lg);
    opacity: 0;
    transform: translateX(400px);
    animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast.removing {
    animation: slideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOut {
    to {
        opacity: 0;
        transform: translateX(400px);
    }
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 14px;
}

.toast.success .toast-icon {
    background: var(--success);
    color: white;
}

.toast.error .toast-icon {
    background: var(--danger);
    color: white;
}

.toast.warning .toast-icon {
    background: var(--warning);
    color: white;
}

.toast.info .toast-icon {
    background: var(--info);
    color: white;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.toast-message {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.toast-close {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 16px;
    padding: 0;
}

.toast-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Mobile Toast Adjustments */
@media (max-width: 768px) {
    .toast-container {
        top: 12px;
        right: 12px;
        left: 12px;
        max-width: none;
    }

    .toast {
        padding: 14px 16px;
    }
}

/* ============================================================================
   LOADING STATES FOR BUTTONS
   ============================================================================ */

.btn {
    position: relative;
    transition: all 0.2s ease;
}

.btn.loading {
    pointer-events: none;
    color: transparent !important;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin-top: -8px;
    margin-left: -8px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Preserve icon color when loading */
.btn.loading i {
    opacity: 0;
}

/* ============================================================================
   CONFIRMATION DIALOG
   ============================================================================ */

.confirm-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.confirm-dialog.active {
    opacity: 1;
    pointer-events: all;
}

.confirm-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.confirm-box {
    position: relative;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    max-width: 480px;
    width: 90%;
    box-shadow: 0 20px 60px var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.confirm-dialog.active .confirm-box {
    transform: scale(1);
}

.confirm-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.confirm-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 24px;
    color: white;
}

.confirm-icon.warning {
    background: var(--warning);
}

.confirm-icon.danger {
    background: var(--danger);
}

.confirm-icon.info {
    background: var(--info);
}

.confirm-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.confirm-message {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.confirm-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.confirm-actions .btn {
    min-width: 100px;
}

/* ============================================================================
   COPY TO CLIPBOARD BUTTON
   ============================================================================ */

.copy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
    padding: 0;
    margin-left: 8px;
    vertical-align: middle;
}

.copy-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.05);
}

.copy-btn:active {
    transform: scale(0.95);
}

.copy-btn.copied {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.copy-btn.copied::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
}

.copy-btn.copied i {
    display: none;
}

/* ============================================================================
   SMOOTH ANIMATIONS FOR DATA UPDATES
   ============================================================================ */

.data-table tbody tr {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.data-table tbody tr.new-row {
    animation: highlightNew 1.5s ease-out;
}

@keyframes highlightNew {
    0% {
        background: rgba(16, 185, 129, 0.2);
        transform: scale(1.02);
    }
    100% {
        background: transparent;
        transform: scale(1);
    }
}

.data-table tbody tr.updated-row {
    animation: highlightUpdate 1s ease-out;
}

@keyframes highlightUpdate {
    0% {
        background: rgba(59, 130, 246, 0.2);
    }
    100% {
        background: transparent;
    }
}

.stat-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--shadow-lg);
}

.stat-card h3 {
    transition: color 0.3s ease;
}

/* Pulse animation for active connections */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.status-indicator.active {
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================================================
   SKELETON LOADING
   ============================================================================ */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 0%,
        var(--bg-secondary) 50%,
        var(--bg-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 8px;
}

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

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-text.large {
    height: 24px;
}

.skeleton-text.small {
    height: 12px;
    width: 60%;
}

/* ============================================================================
   ENHANCED SEARCH INPUT
   ============================================================================ */

.search-wrapper {
    position: relative;
    display: inline-block;
}

.search-wrapper input {
    padding-left: 40px !important;
}

.search-wrapper::before {
    content: '\f002';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-wrapper.loading::after {
    content: '';
    position: absolute;
    right: 14px;
    top: 50%;
    width: 16px;
    height: 16px;
    margin-top: -8px;
    border: 2px solid var(--text-muted);
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ============================================================================
   BADGE IMPROVEMENTS
   ============================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
}

.badge.pulse {
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        box-shadow: 0 0 0 0 currentColor;
    }
    50% {
        box-shadow: 0 0 0 4px transparent;
    }
}

/* ============================================================================
   SMOOTH TRANSITIONS FOR ALL INTERACTIVE ELEMENTS
   ============================================================================ */

button,
input,
select,
textarea,
.tab-btn,
.stat-card,
.panel {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================================
   IMPROVED SCROLLBAR
   ============================================================================ */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #525252;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #737373;
}

/* ============================================================================
   RIPPLE EFFECT FOR BUTTONS
   ============================================================================ */

.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* ============================================================================
   MOBILE OPTIMIZATIONS FOR ENHANCEMENTS
   ============================================================================ */

@media (max-width: 768px) {
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .confirm-box {
        padding: 20px;
    }

    .confirm-title {
        font-size: 18px;
    }

    .confirm-actions {
        flex-direction: column-reverse;
    }

    .confirm-actions .btn {
        width: 100%;
        min-width: unset;
    }
}

/* ============================================================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================================================ */

.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
    .theme-toggle,
    .toast-container,
    .btn,
    .tabs,
    .dashboard-header,
    .dashboard-footer {
        display: none !important;
    }

    .panel {
        page-break-inside: avoid;
    }
}