/* ============================================
   SMTP Checker - Modern Dark Theme
   ============================================ */

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252542;
    --bg-card: linear-gradient(145deg, #1e1e35, #16162b);

    --accent-orange: #FF6B35;
    --accent-orange-glow: rgba(255, 107, 53, 0.3);
    --accent-yellow: #F7931E;
    --accent-green: #00C853;
    --accent-red: #FF5252;
    --accent-blue: #448AFF;
    --accent-cyan: #00BCD4;

    --text-primary: #ffffff;
    --text-secondary: #a0a0b5;
    --text-muted: #6b6b80;

    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(255, 107, 53, 0.5);

    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px var(--accent-orange-glow);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Background gradient effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(255, 107, 53, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(247, 147, 30, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-yellow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Tab Switcher */
.tab-switcher {
    display: flex;
    gap: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 5px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.tab-btn:hover {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-yellow));
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 15px var(--accent-orange-glow);
}

/* Form Styles */
.check-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 30px;
    box-shadow: var(--shadow-card);
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

/* Custom Email Section */
.custom-email-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 20px 30px;
    box-shadow: var(--shadow-card);
    margin-bottom: 30px;
}

.custom-fields {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    animation: fadeIn 0.3s ease;
}

/* Editor + Preview Layout */
.editor-preview-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    min-height: 350px;
}

.editor-pane,
.preview-pane {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.pane-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.editor-pane textarea {
    flex: 1;
    resize: vertical;
    min-height: 300px;
}

.preview-pane iframe {
    flex: 1;
    width: 100%;
    min-height: 300px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: #ffffff;
}

@media (max-width: 768px) {
    .editor-preview-container {
        grid-template-columns: 1fr;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.form-group {
    position: relative;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group label .icon {
    font-size: 1rem;
}

.form-group label .hint {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: 'Inter', monospace;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-orange);
    box-shadow: 0 0 0 3px var(--accent-orange-glow);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 42px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    opacity: 0.6;
    transition: var(--transition);
}

.toggle-password:hover {
    opacity: 1;
}

/* Textarea */
textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    transition: var(--transition);
    resize: vertical;
    line-height: 1.8;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-orange);
    box-shadow: 0 0 0 3px var(--accent-orange-glow);
}

textarea::placeholder {
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
}

/* Checkbox Label */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-orange);
}

/* Buttons */
.btn-small {
    padding: 6px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-small:hover {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 40px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-yellow));
    color: white;
    box-shadow: 0 4px 15px var(--accent-orange-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--accent-orange-glow);
}

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

/* Results Section */
.results-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 25px;
    box-shadow: var(--shadow-card);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
}

.results-actions {
    display: flex;
    gap: 10px;
}

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-orange);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

.status-bar.loading .spinner {
    display: block;
}

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

/* Summary Card */
.summary-card {
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.summary-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px;
    text-align: center;
    transition: var(--transition);
}

.summary-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent-orange);
}

.summary-item .summary-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.summary-item .summary-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-item.total .summary-value {
    color: var(--accent-blue);
}

.summary-item.valid .summary-value {
    color: var(--accent-green);
}

.summary-item.invalid .summary-value {
    color: var(--accent-red);
}

.summary-item.errors .summary-value {
    color: var(--accent-yellow);
}

/* Results List */
.results-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.result-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.result-card:hover {
    border-color: var(--accent-orange);
}

.result-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
    transition: var(--transition);
}

.result-card-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.result-card-header h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    font-weight: 600;
}

.result-card-header .result-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.valid {
    background: rgba(0, 200, 83, 0.15);
    color: var(--accent-green);
}

.status-badge.invalid {
    background: rgba(255, 82, 82, 0.15);
    color: var(--accent-red);
}

.status-badge.error {
    background: rgba(247, 147, 30, 0.15);
    color: var(--accent-yellow);
}

.status-badge.sent {
    background: rgba(0, 188, 212, 0.15);
    color: var(--accent-cyan);
}

.result-card-body {
    padding: 0 20px 20px;
    display: none;
    border-top: 1px solid var(--border-color);
}

.result-card.expanded .result-card-body {
    display: block;
    padding-top: 15px;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.detail-item {
    background: var(--bg-secondary);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
}

.detail-item .detail-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.detail-item .detail-value {
    font-size: 0.9rem;
    color: var(--accent-orange);
    font-family: monospace;
    word-break: break-all;
}

.detail-item.full-width {
    grid-column: 1 / -1;
}

.detail-item .detail-value.message {
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
}

/* Toggle arrow */
.toggle-arrow {
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition);
}

.result-card.expanded .toggle-arrow {
    transform: rotate(180deg);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }

    .results-header {
        flex-direction: column;
        gap: 15px;
    }

    .tab-switcher {
        flex-direction: column;
    }
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-orange);
    border-radius: 3px;
}

/* ============================================
   Toast notification
   ============================================ */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 14px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius-md);
    color: var(--accent-green);
    font-size: 0.9rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
    z-index: 1000;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }

    to {
        opacity: 0;
        transform: translateY(20px);
    }
}