/* Modern Design System for XTempMail */
:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #161d30;
    --bg-glass: rgba(22, 29, 48, 0.65);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-focus: rgba(99, 102, 241, 0.4);
    
    --color-primary: #6366f1; /* Indigo */
    --color-secondary: #a855f7; /* Purple */
    --color-primary-rgb: 99, 102, 241;
    --color-gradient: linear-gradient(135deg, #6366f1, #a855f7);
    
    --color-text-main: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-dark: #64748b;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px 2px rgba(99, 102, 241, 0.15);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.08) 0%, transparent 45%);
    background-attachment: fixed;
    color: var(--color-text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* App Container Layout */
.app-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-glass);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    z-index: 10;
    flex-shrink: 0;
    transition: transform var(--transition-slow);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--color-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
}

.logo-icon i {
    font-size: 20px;
    color: white;
}

.logo-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 40%, var(--color-text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-badge {
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--color-primary);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 12px;
    font-weight: 600;
}

/* Mailbox management panel */
.mailbox-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.section-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    font-weight: 600;
}

.dropdown-container {
    position: relative;
    width: 100%;
}

.custom-select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--color-text-main);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: var(--transition-fast);
}

.custom-select:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.dropdown-container i.select-chevron {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--color-text-muted);
    font-size: 14px;
}

.btn-group {
    display: flex;
    gap: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--color-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    color: var(--color-text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.btn-danger-outline {
    background: transparent;
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-danger);
}

.btn-danger-outline:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--color-danger);
}

.btn-block {
    width: 100%;
}

.btn-icon-only {
    padding: 12px;
}

/* Mailbox List in Sidebar */
.mailbox-list-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mailbox-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.mailbox-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
}

.mailbox-item.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--color-primary);
    box-shadow: inset 0 0 12px rgba(99, 102, 241, 0.05);
}

.mailbox-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    flex: 1;
}

.mailbox-email {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mailbox-label {
    font-size: 10px;
    color: var(--color-text-muted);
}

.mailbox-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.mailbox-btn-del {
    background: transparent;
    border: none;
    color: var(--color-text-dark);
    padding: 6px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.mailbox-btn-del:hover {
    color: var(--color-danger);
    background: rgba(239, 68, 68, 0.15);
}

.sidebar-footer {
    border-top: 1px solid var(--border-glass);
    padding-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 11px;
    color: var(--color-text-dark);
}

.sidebar-footer-links {
    display: flex;
    gap: 12px;
}

.sidebar-footer-links span {
    cursor: pointer;
    transition: var(--transition-fast);
}

.sidebar-footer-links span:hover {
    color: var(--color-primary);
}

/* Main Dashboard Panel */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Loader Progress Bar */
.progress-bar-container {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.02);
    position: relative;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--color-gradient);
    transition: width 0.1s linear;
}

/* Dashboard Header */
.dashboard-header {
    background: rgba(15, 23, 42, 0.4);
    border-bottom: 1px solid var(--border-glass);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.active-mail-card {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 4px 6px 4px 16px;
    max-width: 600px;
    width: 100%;
    gap: 12px;
}

.active-mail-icon {
    color: var(--color-primary);
    font-size: 16px;
    flex-shrink: 0;
}

.active-mail-address {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    user-select: all;
    flex: 1;
}

.active-mail-buttons {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.header-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    color: var(--color-text-main);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.header-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.header-btn i.spin {
    animation: rotate 1s linear infinite;
}

/* Status section */
.status-section {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 20px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-success);
    box-shadow: 0 0 8px var(--color-success);
}

/* Dual Pane Layout */
.inbox-container {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
}

.inbox-list-pane {
    width: 420px;
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex-shrink: 0;
}

.inbox-search-bar {
    padding: 16px;
    border-bottom: 1px solid var(--border-glass);
    position: relative;
}

.inbox-search-bar input {
    width: 100%;
    padding: 10px 12px 10px 36px;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--color-text-main);
    font-size: 13px;
    outline: none;
    transition: var(--transition-fast);
}

.inbox-search-bar input:focus {
    border-color: var(--color-primary);
}

.inbox-search-bar i {
    position: absolute;
    left: 28px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-dark);
    font-size: 13px;
}

/* Message List */
.message-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message-card {
    display: flex;
    gap: 12px;
    padding: 16px;
    border-radius: var(--radius-md);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.message-card:hover {
    background: rgba(255, 255, 255, 0.02);
    border-color: var(--border-glass);
}

.message-card.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.2);
}

.message-avatar {
    width: 38px;
    height: 38px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-main);
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.message-card.active .message-avatar {
    background: var(--color-gradient);
    color: white;
}

.message-details {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.message-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
}

.message-sender {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.message-date {
    font-size: 11px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.message-subject {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.message-snippet {
    font-size: 12px;
    color: var(--color-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Empty State / Loading State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
    gap: 16px;
    color: var(--color-text-muted);
    height: 100%;
}

.empty-state i.large-icon {
    font-size: 48px;
    color: var(--color-text-dark);
    margin-bottom: 8px;
}

.empty-state h3 {
    font-size: 18px;
    color: var(--color-text-main);
    font-weight: 600;
}

.empty-state p {
    font-size: 13px;
    max-width: 280px;
}

/* Reading Pane */
.reading-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: rgba(15, 23, 42, 0.2);
}

.reading-pane-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.reading-meta-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}

.reading-subject {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-main);
    line-height: 1.3;
}

.reading-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.reading-sender-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.reading-sender-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.reading-sender-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-main);
}

.reading-recipient {
    font-size: 12px;
    color: var(--color-text-muted);
}

.reading-date {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* Attachments Panel */
.attachments-panel {
    margin-top: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.attachments-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.attachments-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.attachment-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--color-text-main);
    font-size: 12px;
    text-decoration: none;
    transition: var(--transition-fast);
}

.attachment-badge:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--color-primary);
}

.attachment-badge i {
    color: var(--color-primary);
}

/* Email content frame container */
.reading-pane-body {
    flex: 1;
    position: relative;
    padding: 24px;
    overflow: hidden;
}

.email-iframe-container {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.email-iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Modal Overlay & Dialogs */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(7, 10, 19, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-dialog {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    width: 480px;
    max-width: 90%;
    padding: 28px;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-overlay.active .modal-dialog {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-main);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close-btn:hover {
    color: var(--color-danger);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
}

.input-domain-wrapper {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-fast);
}

.input-domain-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.input-domain-wrapper input {
    flex: 1;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: var(--color-text-main);
    font-size: 14px;
    outline: none;
    font-weight: 500;
}

.domain-suffix {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-left: 1px solid var(--border-glass);
    color: var(--color-text-muted);
    font-size: 14px;
    font-weight: 600;
    user-select: none;
}

.validation-hint {
    font-size: 11px;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.error-message {
    font-size: 12px;
    color: var(--color-danger);
    font-weight: 500;
    display: none;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    color: var(--color-text-main);
    font-size: 13px;
    font-weight: 500;
    animation: slideInRight 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    min-width: 240px;
    max-width: 360px;
}

.toast.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast.toast-warning {
    border-left: 4px solid var(--color-warning);
}

.toast.toast-danger {
    border-left: 4px solid var(--color-danger);
}

.toast i {
    font-size: 16px;
}

.toast.toast-success i { color: var(--color-success); }
.toast.toast-warning i { color: var(--color-warning); }
.toast.toast-danger i { color: var(--color-danger); }

/* Animation Keyframes */
@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes slideInRight {
    0% { transform: translateX(100%); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

/* Skeleton Loading Effects */
.skeleton-loading {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 8px;
}

.skeleton-item {
    height: 70px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glass);
    position: relative;
    overflow: hidden;
}

.skeleton-item::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
    transform: translateX(-100%);
    animation: loading-shimmer 1.5s infinite;
}

@keyframes loading-shimmer {
    100% { transform: translateX(100%); }
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .inbox-list-pane {
        width: 320px;
    }
    .sidebar {
        width: 260px;
    }
}

@media (max-width: 768px) {
    body {
        overflow-y: auto;
    }
    .app-container {
        flex-direction: column;
        overflow: visible;
        height: auto;
    }
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-glass);
    }
    .inbox-container {
        flex-direction: column;
        height: 600px;
    }
    .inbox-list-pane {
        width: 100%;
        height: 300px;
        border-right: none;
        border-bottom: 1px solid var(--border-glass);
    }
    .reading-pane {
        height: 300px;
    }
    .active-mail-card {
        max-width: 100%;
    }
    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
    }
}