:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --surface-hover: #2c2c2c;
    --text-primary: #e0e0e0;
    --text-secondary: #aaaaaa;
    --accent-color: #E50914; /* Netflix Red */
    --accent-hover: #f40612;
    --border-color: #333333;
    --danger-color: #cf6679;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

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

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    height: 64px;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo-text {
    color: var(--accent-color);
    font-weight: 800;
    font-size: 24px;
    letter-spacing: 1px;
}

.logo-sub {
    color: var(--text-secondary);
    font-size: 14px;
}

.search-bar input {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 24px;
    width: 400px;
    outline: none;
    transition: border-color 0.2s;
}

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

.profile-icon {
    width: 32px;
    height: 32px;
    background-color: var(--accent-color);
    border-radius: 50%;
}

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

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--bg-color);
    padding: 20px 0;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.compose-btn {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    margin: 0 20px 20px;
    border-radius: 16px;
    cursor: not-allowed;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    list-style: none;
}

.nav-links li {
    padding: 12px 24px;
    cursor: pointer;
    border-radius: 0 20px 20px 0;
    margin-right: 20px;
    color: var(--text-secondary);
    transition: background-color 0.2s, color 0.2s;
}

.nav-links li:hover {
    background-color: var(--surface-hover);
}

.nav-links li.active {
    background-color: rgba(229, 9, 20, 0.1);
    color: var(--accent-color);
    font-weight: 500;
}

/* List View */
.email-list-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-color);
}

.list-header {
    padding: 10px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.refresh-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.refresh-btn:hover {
    background: var(--surface-hover);
}

.email-list {
    flex: 1;
    overflow-y: auto;
}

.email-item {
    display: flex;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    align-items: center;
    transition: background-color 0.2s;
}

.email-item:hover {
    background-color: var(--surface-hover);
    box-shadow: inset 2px 0 0 var(--accent-color);
}

.email-item.unread {
    background-color: var(--surface-color);
    font-weight: 600;
}

.email-item-sender {
    width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 15px;
}

.email-item-subject {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.email-item-date {
    width: 100px;
    text-align: right;
    color: var(--text-secondary);
    font-size: 12px;
}

/* Detail View */
.email-detail-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--surface-color);
}

.hidden {
    display: none !important;
}

.detail-toolbar {
    padding: 10px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.back-btn, .delete-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.back-btn:hover {
    background: var(--surface-hover);
}

.delete-btn {
    margin-left: auto;
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.delete-btn:hover {
    background: rgba(207, 102, 121, 0.1);
}

.email-header {
    padding: 30px;
    border-bottom: 1px solid var(--border-color);
}

.email-subject {
    font-size: 22px;
    margin-bottom: 15px;
    font-weight: 400;
}

.email-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 14px;
}

.email-body {
    flex: 1;
    padding: 20px;
    overflow: hidden;
    background-color: #ffffff; /* Typically emails look better on white, even in dark mode */
}

#email-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #ffffff;
}