:root {
    --edt-navy-deep: #0B1320;
    --edt-navy-mid: #0A1422;
    --edt-navy-light: #162B44;
    --edt-blue-mid: #2A4F6B;
    --edt-accent-blue: #2B78B8;
    --edt-highlight-blue: #3B8ED0;
    --edt-glass-bg: rgba(255, 255, 255, 0.06);
    --edt-glass-border: rgba(255, 255, 255, 0.10);
    --edt-text-primary: rgba(255, 255, 255, 0.92);
    --edt-text-secondary: rgba(255, 255, 255, 0.82);
    --edt-text-tertiary: rgba(255, 255, 255, 0.65);
    --edt-success: #2ECC71;
    --edt-warning: #F39C12;
    --edt-error: #E74C3C;
    --edt-info: #3498DB;
}

[data-theme="light"] {
    --edt-navy-deep: #F6F8FC;
    --edt-navy-mid: #FFFFFF;
    --edt-navy-light: #E8EDF5;
    --edt-blue-mid: #D0DFF0;
    --edt-accent-blue: #2B78B8;
    --edt-highlight-blue: #3B8ED0;
    --edt-glass-bg: rgba(255, 255, 255, 0.85);
    --edt-glass-border: rgba(0, 0, 0, 0.08);
    --edt-text-primary: #0B1320;
    --edt-text-secondary: rgba(11, 19, 32, 0.82);
    --edt-text-tertiary: rgba(11, 19, 32, 0.65);
}

* {
    box-sizing: border-box;
}

.edt-container {
    position: relative;
    width: 100%;
    min-height: 600px;
    padding: 40px 20px;
    background: var(--edt-navy-deep);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    overflow: hidden;
}

.edt-hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 400px;
    background: linear-gradient(135deg, var(--edt-navy-mid) 0%, var(--edt-navy-light) 50%, var(--edt-blue-mid) 100%);
    opacity: 0.6;
    pointer-events: none;
    z-index: 0;
}

.edt-main-card {
    position: relative;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    background: var(--edt-glass-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid var(--edt-glass-border);
    padding: 48px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 1;
    overflow: hidden;
}

.edt-header {
    text-align: center;
    margin-bottom: 48px;
}

.edt-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--edt-text-primary);
    margin: 0 0 12px 0;
    letter-spacing: -0.5px;
}

.edt-subtitle {
    font-size: 16px;
    color: var(--edt-text-secondary);
    margin: 0 0 16px 0;
    font-weight: 400;
}

.edt-branding {
    font-size: 13px;
    color: var(--edt-text-tertiary);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.edt-input-section {
    margin-bottom: 32px;
}

.edt-input-wrapper {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.edt-input {
    flex: 1;
    padding: 16px 20px;
    font-size: 16px;
    color: var(--edt-text-primary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--edt-glass-border);
    border-radius: 12px;
    outline: none;
    transition: all 0.3s ease;
    font-family: inherit;
}

.edt-input::placeholder {
    color: var(--edt-text-tertiary);
}

.edt-input:focus {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--edt-accent-blue);
    box-shadow: 0 0 0 4px rgba(59, 142, 208, 0.1);
}

.edt-btn-primary {
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    color: #FFFFFF;
    background: linear-gradient(180deg, var(--edt-highlight-blue) 0%, var(--edt-accent-blue) 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(59, 142, 208, 0.3);
    white-space: nowrap;
}

.edt-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 142, 208, 0.4);
}

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

.edt-btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.edt-btn-text,
.edt-btn-loading {
    display: flex;
    align-items: center;
    gap: 8px;
}

.edt-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #FFFFFF;
    border-radius: 50%;
    animation: edt-spin 0.8s linear infinite;
}

@keyframes edt-spin {
    to { transform: rotate(360deg); }
}

.edt-error-message {
    padding: 12px 16px;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    border-radius: 8px;
    color: #E74C3C;
    font-size: 14px;
}

.edt-results-header {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--edt-glass-border);
}

.edt-results-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--edt-text-primary);
    margin: 0 0 16px 0;
}

.edt-results-email {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.edt-label {
    color: var(--edt-text-tertiary);
    font-weight: 500;
}

.edt-email-display {
    padding: 6px 14px;
    background: rgba(59, 142, 208, 0.15);
    border: 1px solid rgba(59, 142, 208, 0.3);
    border-radius: 6px;
    color: var(--edt-highlight-blue);
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

.edt-diagnostics-grid {
    display: grid;
    gap: 16px;
    margin-bottom: 32px;
}

.edt-diagnostic-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--edt-glass-border);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
    animation: edt-fadeIn 0.5s ease forwards;
    opacity: 0;
    overflow: hidden;
    word-wrap: break-word;
}

.edt-diagnostic-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

@keyframes edt-fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.edt-diagnostic-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.edt-status-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
    flex-shrink: 0;
}

.edt-status-pass {
    background: rgba(46, 204, 113, 0.15);
    color: var(--edt-success);
}

.edt-status-fail {
    background: rgba(231, 76, 60, 0.15);
    color: var(--edt-error);
}

.edt-status-warning {
    background: rgba(243, 156, 18, 0.15);
    color: var(--edt-warning);
}

.edt-status-info {
    background: rgba(52, 152, 219, 0.15);
    color: var(--edt-info);
}

.edt-diagnostic-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--edt-text-primary);
    margin: 0;
}

.edt-diagnostic-message {
    font-size: 14px;
    color: var(--edt-text-secondary);
    margin: 0 0 8px 0;
}

.edt-diagnostic-details {
    font-size: 13px;
    color: var(--edt-text-tertiary);
    line-height: 1.6;
    margin: 0;
}

.edt-record-list {
    margin: 12px 0 0 0;
    padding: 12px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    overflow-x: auto;
    max-width: 100%;
}

.edt-record-item {
    padding: 6px 0;
    color: var(--edt-text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    white-space: nowrap;
    overflow-x: auto;
}

.edt-record-item:last-child {
    border-bottom: none;
}

.edt-actions-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.edt-btn-secondary {
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--edt-text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--edt-glass-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.edt-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--edt-accent-blue);
}

.edt-btn-secondary svg {
    flex-shrink: 0;
}

.edt-email-section {
    padding: 24px;
    background: rgba(59, 142, 208, 0.05);
    border: 1px solid rgba(59, 142, 208, 0.2);
    border-radius: 12px;
    margin-bottom: 32px;
}

.edt-email-section h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--edt-text-primary);
    margin: 0 0 16px 0;
}

.edt-email-input-wrapper {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.edt-email-help {
    font-size: 13px;
    color: var(--edt-text-tertiary);
    margin: 0;
    font-style: italic;
}

.edt-email-status {
    padding: 14px 18px;
    border-radius: 8px;
    margin-top: 16px;
    font-size: 14px;
    font-weight: 500;
    display: none;
    animation: edt-slideIn 0.3s ease;
}

.edt-email-status .status-icon {
    font-size: 16px;
    margin-right: 8px;
}

.edt-email-status.status-validating {
    background: rgba(52, 152, 219, 0.1);
    border: 1px solid rgba(52, 152, 219, 0.3);
    color: var(--edt-info);
}

.edt-email-status.status-connecting {
    background: rgba(52, 152, 219, 0.15);
    border: 1px solid rgba(52, 152, 219, 0.4);
    color: var(--edt-info);
}

.edt-email-status.status-sending {
    background: rgba(52, 152, 219, 0.2);
    border: 1px solid rgba(52, 152, 219, 0.5);
    color: var(--edt-info);
}

.edt-email-status.status-delivered {
    background: rgba(46, 204, 113, 0.15);
    border: 1px solid rgba(46, 204, 113, 0.4);
    color: var(--edt-success);
}

.edt-email-status.status-error {
    background: rgba(231, 76, 60, 0.15);
    border: 1px solid rgba(231, 76, 60, 0.4);
    color: var(--edt-error);
}

.edt-config-link {
    margin-top: 16px;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--edt-glass-border);
    border-radius: 8px;
    font-size: 13px;
    color: var(--edt-text-secondary);
}

.edt-config-link a {
    color: var(--edt-highlight-blue);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.edt-config-link a:hover {
    color: var(--edt-accent-blue);
    text-decoration: underline;
}

.edt-btn-primary svg {
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .edt-main-card {
        padding: 32px 24px;
    }

    .edt-title {
        font-size: 28px;
    }

    .edt-input-wrapper {
        flex-direction: column;
    }

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

    .edt-actions-bar {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .edt-container {
        padding: 20px 12px;
    }

    .edt-main-card {
        padding: 24px 16px;
        border-radius: 16px;
    }

    .edt-title {
        font-size: 24px;
    }

    .edt-subtitle {
        font-size: 14px;
    }
}

.edt-fade-in {
    animation: edt-fadeIn 0.5s ease forwards;
}

.edt-slide-in {
    animation: edt-slideIn 0.5s ease forwards;
}

@keyframes edt-slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}