:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --danger: #ef4444;
    --success: #22c55e;
    --border: #334155;
    --glass: rgba(30, 41, 59, 0.7);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
    /* App-like feel */
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 320px;
    background-color: var(--bg-card);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    flex-shrink: 0;
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.025em;
}

.brand .highlight {
    color: var(--accent);
}

.email-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
}

.email-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.email-address-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

#email-address {
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 0.5rem;
    color: var(--accent);
}

#copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
    padding: 4px;
}

#copy-btn:hover {
    color: var(--text-primary);
}

.timer-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.action-btn {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 0.5rem;
    background-color: var(--accent);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 0.5rem;
}

.action-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.action-btn.secondary {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.action-btn.secondary:hover {
    border-color: var(--danger);
    color: var(--danger);
}

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

.top-bar {
    height: 80px;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
}

.status-indicator {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    margin-right: 0.5rem;
    box-shadow: 0 0 8px var(--success);
}

/* Split View */
.content-split {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.email-list-container {
    width: 400px;
    border-right: 1px solid var(--border);
    overflow-y: auto;
    background-color: rgba(30, 41, 59, 0.3);
}

.email-list {
    list-style: none;
}

.email-item {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background-color 0.2s;
}

.email-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

.email-item.active {
    background-color: rgba(56, 189, 248, 0.1);
    border-left: 3px solid var(--accent);
}

.email-item.unread .email-subject {
    font-weight: 700;
    color: var(--text-primary);
}

.email-sender {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    display: flex;
    justify-content: space-between;
}

.email-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.email-subject {
    font-size: 0.9rem;
    color: var(--text-secondary);
    /* Default to less bold */
    margin-bottom: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-excerpt {
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Detail View */
.email-detail-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    background-color: var(--bg-dark);
}

.empty-state {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.empty-state svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Email Content Styles */
.detail-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.detail-subject {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.detail-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.detail-body {
    line-height: 1.6;
    color: var(--text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

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

/* Footer Credits */
.footer-credits {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: #e2e8f0;
    /* High contrast text (slate-200) */
    line-height: 1.6;
}

.footer-credits p {
    margin-bottom: 0.5rem;
}

.footer-credits a {
    color: #ffffff;
    /* Max contrast (white) */
    font-weight: 700;
    text-decoration: underline;
    text-decoration-color: var(--accent);
    transition: all 0.2s;
}

.footer-credits a:hover {
    color: var(--accent);
    text-decoration-color: white;
}