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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-main) 0%, #1e1b4b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: var(--bg-card);
    border-radius: 16px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px var(--shadow);
}

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

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats {
    display: flex;
    gap: 20px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-hover);
    border-radius: 8px;
    font-size: 14px;
}

.stat-icon {
    font-size: 20px;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

/* Email Generator */
.email-generator {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.generator-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 6px var(--shadow);
}

.generator-card h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.email-display-container {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.email-display {
    flex: 1;
    background: var(--bg-main);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    font-size: 18px;
    font-family: 'Courier New', monospace;
    color: var(--primary);
    display: flex;
    align-items: center;
    min-height: 56px;
}

.email-display .placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

.email-actions {
    display: flex;
    gap: 8px;
}

.generator-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Custom Email Form */
.custom-email-form {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid var(--border);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.custom-email-form .input,
.custom-email-form .select {
    flex: 1;
    min-width: 200px;
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--shadow);
}

.info-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.info-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.info-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Emails Section */
.emails-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 6px var(--shadow);
}

.emails-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.emails-header h2 {
    font-size: 20px;
}

.emails-actions {
    display: flex;
    gap: 8px;
}

.emails-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.email-item {
    background: var(--bg-main);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.email-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.email-item.unread {
    border-color: var(--primary);
    background: linear-gradient(135deg, var(--bg-main) 0%, rgba(102, 126, 234, 0.1) 100%);
}

.email-info {
    flex: 1;
    min-width: 0;
}

.email-from {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.email-badge {
    background: var(--primary);
    color: white;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
}

.email-subject {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-preview {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.email-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.email-time {
    white-space: nowrap;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    opacity: 0.3;
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

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

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

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-icon {
    padding: 12px;
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn svg {
    stroke-width: 2;
}

/* Input & Select */
.input,
.select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-main);
    border: 2px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s;
}

.input:focus,
.select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.select {
    cursor: pointer;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    border-bottom: 2px solid var(--border);
}

.modal-header h2 {
    font-size: 20px;
    flex: 1;
    margin-right: 20px;
}

.modal-meta {
    padding: 16px 30px;
    background: var(--bg-main);
    border-bottom: 2px solid var(--border);
    font-size: 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-secondary);
}

.modal-body {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.email-view-tabs {
    display: flex;
    gap: 8px;
    padding: 16px 30px;
    border-bottom: 2px solid var(--border);
}

.tab-btn {
    padding: 8px 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.2s;
}

.tab-btn.active {
    background: var(--primary);
    color: white;
}

.email-content {
    flex: 1;
    overflow: auto;
    padding: 20px 30px;
}

.email-frame {
    width: 100%;
    min-height: 400px;
    border: none;
    background: white;
    border-radius: 8px;
}

.email-text {
    background: var(--bg-main);
    padding: 20px;
    border-radius: 8px;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
}

.modal-actions {
    padding: 20px 30px;
    border-top: 2px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Toast */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    min-width: 300px;
    box-shadow: 0 8px 24px var(--shadow);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast-success {
    border-color: var(--success);
}

.toast-error {
    border-color: var(--danger);
}

.toast-icon {
    font-size: 24px;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 16px;
    }

    .stats {
        width: 100%;
        justify-content: center;
    }

    .generator-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .custom-email-form {
        flex-direction: column;
    }

    .custom-email-form .input,
    .custom-email-form .select {
        width: 100%;
    }

    .email-display-container {
        flex-direction: column;
    }

    .email-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .emails-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .emails-actions {
        width: 100%;
    }

    .emails-actions .btn {
        flex: 1;
    }
}