/* ============================================================
   TempMail — Factory.ai Style Design System
   浅色工业极简风格：黑白灰 + 深蓝点缀，无渐变，无紫色
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap');

/* ── 设计令牌 ── */
:root {
    --bg:          #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-tertiary:  #f0f0f0;
    --border:      #e0e0e0;
    --border-dark: #c0c0c0;

    --text-primary:   #111111;
    --text-secondary: #555555;
    --text-muted:     #999999;

    --accent:        #0a0a0a;
    --accent-light:  #1a1a1a;
    --accent-blue:   #0f4c81;
    --accent-blue-h: #0a3a6a;

    --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'DM Mono', 'JetBrains Mono', 'Fira Code', monospace;

    --radius: 0px;
    --radius-sm: 2px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.10);

    --transition: 0.15s ease;
    --max-width: 860px;
}

/* Dark mode */
[data-theme="dark"] {
    --bg:          #111111;
    --bg-secondary: #1a1a1a;
    --bg-tertiary:  #242424;
    --border:      #2a2a2a;
    --border-dark: #3a3a3a;

    --text-primary:   #f5f5f5;
    --text-secondary: #aaaaaa;
    --text-muted:     #666666;

    --accent:       #f5f5f5;
    --accent-light: #e0e0e0;
    --accent-blue:  #3b82f6;
    --accent-blue-h:#60a5fa;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 0; }

/* ── Navigation ── */
.top-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    height: 56px;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    text-decoration: none;
}

.brand-icon {
    font-size: 18px;
    line-height: 1;
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border: 1px solid transparent;
    transition: color var(--transition), border-color var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    border-color: var(--border);
}

.nav-link-primary {
    color: var(--bg);
    background: var(--accent);
    border-color: var(--accent);
}

.nav-link-primary:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    color: var(--bg);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px 9px;
    font-size: 13px;
    transition: border-color var(--transition);
    margin-right: 4px;
}

.theme-toggle:hover { border-color: var(--border-dark); }

.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: inline; }

/* ── Container ── */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* ── Hero ── */
.hero-section {
    padding: 72px 0 56px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 4px 10px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -1.5px;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.hero-features {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 4px 10px;
    letter-spacing: 0.02em;
}

.feature-tag i { font-size: 10px; }

/* ── Panel Label ── */
.panel-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}

/* ── Cards ── */
.panel-card {
    border: 1px solid var(--border);
    background: var(--bg);
    padding: 32px;
    margin-bottom: 24px;
    transition: border-color var(--transition);
}

.panel-card:hover { border-color: var(--border-dark); }

/* ── Panel Header ── */
.panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.panel-header h2 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.3px;
    color: var(--text-primary);
}

/* ── Email Display ── */
.email-display { margin-bottom: 20px; }

.email-input-container {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    transition: border-color var(--transition);
}

.email-input-container:focus-within { border-color: var(--accent); }

.email-prefix {
    flex: 1;
    border: none;
    background: transparent;
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--text-primary);
    outline: none;
    min-width: 0;
}

.email-prefix::placeholder { color: var(--text-muted); }

.at-symbol {
    padding: 0 4px;
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--text-muted);
    user-select: none;
    flex-shrink: 0;
}

.domain-selector {
    border: none;
    border-left: 1px solid var(--border);
    background: var(--bg);
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-primary);
    outline: none;
    cursor: pointer;
    flex-shrink: 0;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23999'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

/* ── Buttons ── */
.action-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
    border-radius: var(--radius);
    background: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
}

.btn-secondary {
    background: var(--bg);
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover {
    border-color: var(--border-dark);
    background: var(--bg-secondary);
}

.btn-large {
    padding: 12px 22px;
    font-size: 14px;
}

.btn-icon-only {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 10px;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition);
    border-radius: var(--radius);
}

.btn-icon-only:hover {
    border-color: var(--border-dark);
    color: var(--text-primary);
}

/* ── Inbox ── */
.inbox-section { margin-bottom: 24px; }

.inbox-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.inbox-header-left h2 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.3px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.inbox-header-left h2 i { font-size: 15px; color: var(--text-muted); }

#inbox-list {
    list-style: none;
}

#inbox-list li {
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    cursor: pointer;
    transition: background var(--transition);
}

#inbox-list li:last-child { border-bottom: none; }

#inbox-list li:hover { background: var(--bg-secondary); margin: 0 -32px; padding: 16px 32px; }

.inbox-placeholder {
    padding: 64px 0;
    text-align: center;
}

.placeholder-icon {
    width: 56px;
    height: 56px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--text-muted);
    font-size: 22px;
}

.inbox-placeholder p {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 6px;
}

.inbox-placeholder small {
    font-size: 13px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ── Features ── */
.features-section {
    padding: 48px 0;
    border-top: 1px solid var(--border);
}

.features-header {
    margin-bottom: 36px;
}

.section-title {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0;
    border: 1px solid var(--border);
}

.feature-card {
    padding: 28px 24px;
    border-right: 1px solid var(--border);
    position: relative;
    transition: background var(--transition);
}

.feature-card:last-child { border-right: none; }

.feature-card:hover { background: var(--bg-secondary); }

.feature-num {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.feature-icon {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.feature-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.2px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ── Footer ── */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0 0;
    margin-top: 48px;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding-bottom: 24px;
}

.footer-brand {
    font-weight: 700;
    font-size: 14px;
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    gap: 4px;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    border: 1px solid transparent;
    transition: all var(--transition);
}

.footer-link:hover {
    color: var(--text-primary);
    border-color: var(--border);
}

.footer-copyright p {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* ── Mailbox Management Section ── */
.mailbox-section {
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 24px;
    background: var(--bg);
}

.mailbox-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.mailbox-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.mailbox-info {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-item label {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.info-item span {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.sender-whitelist {
    border: 1px solid var(--border);
    padding: 20px;
    margin-bottom: 16px;
}

.sender-whitelist h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.help-text {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.whitelist-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.whitelist-controls input {
    flex: 1;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    padding: 8px 12px;
    font-size: 13px;
    font-family: var(--font-mono);
    color: var(--text-primary);
    outline: none;
}

.whitelist-controls input:focus { border-color: var(--accent); }

#sender-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

#sender-list li {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 3px 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mailbox-actions { display: flex; gap: 8px; margin-top: 8px; }

/* ── Animations ── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.panel-card { animation: fadeIn 0.3s ease; }
.hero-section { animation: fadeIn 0.4s ease; }

/* ── Responsive ── */
@media (max-width: 600px) {
    .container { padding: 0 16px 60px; }
    .hero-section { padding: 48px 0 36px; }
    .panel-card { padding: 20px 16px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-card { border-bottom: 1px solid var(--border); }
    .feature-card:nth-child(odd) { border-right: 1px solid var(--border); }
    .feature-card:nth-child(even) { border-right: none; }
    .feature-card:nth-last-child(-n+2) { border-bottom: none; }
    .action-buttons { flex-direction: column; }
    .btn-large { width: 100%; justify-content: center; }
    .footer-content { flex-direction: column; align-items: flex-start; }
    .nav-actions .nav-link span { display: none; }
}

/* ── Email item styles (for JS rendered items) ── */
.email-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px;
    width: 100%;
}

.email-item-subject {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-item-from {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-item-time {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    text-align: right;
    align-self: start;
}

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

/* ── Modal / Overlay (used by main.js) ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-box {
    background: var(--bg);
    border: 1px solid var(--border);
    max-width: 640px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.modal-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
    line-height: 1;
}

.modal-close:hover { color: var(--text-primary); }

/* ── Toast ── */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.2s ease;
    min-width: 240px;
}

.toast-success { border-left: 3px solid #16a34a; }
.toast-error   { border-left: 3px solid #dc2626; }
.toast-info    { border-left: 3px solid var(--accent-blue); }

/* ── Utility ── */
.hidden { display: none !important; }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }