/* app.css — DNS Monitor: Dark industrial theme */
@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,700;1,9..40,300&display=swap');

:root {
    --bg:           #0d0f14;
    --bg-card:      #141720;
    --bg-hover:     #1a1e2b;
    --bg-input:     #1c2030;
    --border:       #242838;
    --border-light: #2e3448;

    --text:         #e2e6f0;
    --text-muted:   #6b7594;
    --text-dim:     #434966;

    --accent:       #3d6ef5;
    --accent-glow:  rgba(61,110,245,0.18);
    --accent-hover: #5585ff;

    --green:        #22c55e;
    --green-bg:     rgba(34,197,94,0.1);
    --red:          #ef4444;
    --red-bg:       rgba(239,68,68,0.1);
    --amber:        #f59e0b;
    --amber-bg:     rgba(245,158,11,0.1);
    --blue:         #60a5fa;
    --blue-bg:      rgba(96,165,250,0.1);

    --font-sans:    'DM Sans', system-ui, sans-serif;
    --font-mono:    'Space Mono', 'Courier New', monospace;

    --radius:       8px;
    --radius-lg:    12px;
    --shadow:       0 4px 24px rgba(0,0,0,0.4);
    --shadow-sm:    0 2px 8px rgba(0,0,0,0.3);
}

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

html { font-size: 15px; }

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

code {
    font-family: var(--font-mono);
    font-size: 0.82em;
    background: var(--bg-input);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 4px;
    color: var(--blue);
    word-break: break-all;
}

/* ─── Navbar ─────────────────────────────── */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}
.navbar-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 32px;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}
.navbar-name {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    letter-spacing: -0.02em;
}
.navbar-links {
    display: flex;
    gap: 4px;
    flex: 1;
}
.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 6px 14px;
    border-radius: 6px;
    transition: all 0.15s;
    text-decoration: none;
}
.nav-link:hover, .nav-link.active {
    color: var(--text);
    background: var(--bg-hover);
}
.nav-link.active {
    color: var(--accent);
}

/* ─── Main Content ───────────────────────── */
.main-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
}
.page-title {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
    line-height: 1.2;
}
.page-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}
.breadcrumb {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 6px;
    font-family: var(--font-mono);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--text); }
.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}

/* ─── Stats Grid ─────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--border-light);
}
.stat-card--healthy::before { background: var(--green); }
.stat-card--issues::before  { background: var(--red); }
.stat-card--unchecked::before { background: var(--amber); }
.stat-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    color: var(--text);
}
.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ─── Cards ──────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    overflow: hidden;
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}
.card-title {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
}
.card-full { grid-column: 1 / -1; }
.header-filters {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ─── DNS Cards ──────────────────────────── */
.dns-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.dns-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: border-color 0.2s;
}
.dns-card:hover { border-color: var(--border-light); }
.dns-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
    gap: 8px;
}
.dns-card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.dns-card-title h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
}
.dns-desc {
    font-size: 0.75rem;
    color: var(--text-dim);
    width: 100%;
    margin-top: 2px;
}
.dns-icon { font-size: 1.1rem; }
.dns-record {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 12px;
    margin-bottom: 12px;
    overflow-x: auto;
}
.dns-record code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    white-space: pre-wrap;
    word-break: break-all;
}
.dns-info p {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ─── Badges ─────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 4px;
    white-space: nowrap;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}
.badge-icon { font-size: 0.75rem; }
.badge-pass    { background: var(--green-bg); color: var(--green); border: 1px solid rgba(34,197,94,0.25); }
.badge-fail    { background: var(--red-bg);   color: var(--red);   border: 1px solid rgba(239,68,68,0.25); }
.badge-missing { background: var(--amber-bg); color: var(--amber); border: 1px solid rgba(245,158,11,0.25); }
.badge-unknown { background: rgba(107,117,148,0.12); color: var(--text-muted); border: 1px solid rgba(107,117,148,0.2); }
.badge-postmark { background: var(--blue-bg); color: var(--blue); border: 1px solid rgba(96,165,250,0.25); }

/* ─── Health Dots ────────────────────────── */
.health-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.health-dot--healthy { background: var(--green); box-shadow: 0 0 6px var(--green); }
.health-dot--critical { background: var(--red); box-shadow: 0 0 6px var(--red); }
.health-dot--unknown  { background: var(--text-dim); }

/* ─── Table ──────────────────────────────── */
.table-wrap {
    overflow-x: auto;
}
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}
.table th {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 10px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: var(--bg-hover); }
.table-compact td { padding: 8px 14px; }
.domain-name {
    display: flex;
    align-items: center;
    gap: 8px;
}
.domain-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text);
    font-weight: 700;
}
.domain-link:hover { color: var(--accent); }
.action-btns { display: flex; gap: 6px; align-items: center; }
.text-muted { color: var(--text-muted); }

/* ─── Buttons ────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    white-space: nowrap;
    line-height: 1.4;
}
.btn-primary {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}
.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(61,110,245,0.35);
}
.btn-secondary {
    background: var(--bg-hover);
    color: var(--text);
    border-color: var(--border-light);
}
.btn-secondary:hover { background: #222738; color: var(--text); }
.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: transparent;
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text); }
.btn-danger-ghost {
    background: transparent;
    color: var(--red);
    border-color: transparent;
}
.btn-danger-ghost:hover { background: var(--red-bg); border-color: var(--red); }
.btn-sm { font-size: 0.8rem; padding: 5px 12px; }
.btn-full { width: 100%; justify-content: center; }
.btn-icon-only {
    padding: 6px 10px;
    background: var(--bg-hover);
    color: var(--text-muted);
    border-color: var(--border);
    font-size: 0.9rem;
    min-width: 32px;
    justify-content: center;
}
.btn-icon-only:hover { color: var(--text); border-color: var(--border-light); }
.btn-icon { opacity: 0.7; }

/* ─── Forms ──────────────────────────────── */
.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 600px;
}
.form-group { margin-bottom: 20px; }
.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 6px;
}
.required { color: var(--red); }
.form-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 14px;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
    -webkit-appearance: none;
}
.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.form-input-sm { width: auto; padding: 5px 10px; font-size: 0.82rem; }
.form-textarea {
    min-height: 100px;
    resize: vertical;
}
.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 5px;
    line-height: 1.4;
}
.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
}
select.form-input {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7594' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    padding-right: 32px;
}

/* ─── Alerts ─────────────────────────────── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 20px;
    border: 1px solid;
}
.alert-error   { background: var(--red-bg);   border-color: rgba(239,68,68,0.3);   color: #fca5a5; }
.alert-success { background: var(--green-bg); border-color: rgba(34,197,94,0.3);   color: #86efac; }
.alert-warning { background: var(--amber-bg); border-color: rgba(245,158,11,0.3);  color: #fcd34d; }
.alert-info    { background: var(--blue-bg);  border-color: rgba(96,165,250,0.3);  color: #93c5fd; }

/* ─── Empty State ────────────────────────── */
.empty-state {
    padding: 60px 24px;
    text-align: center;
}
.empty-state-sm { padding: 32px 24px; }
.empty-icon { font-size: 2.5rem; margin-bottom: 16px; }
.empty-state h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}
.empty-state p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
}

/* ─── Postmark Panel ─────────────────────── */
.setup-panel {
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.setup-panel p { font-size: 0.875rem; color: var(--text-muted); max-width: 500px; }
.postmark-info { padding: 20px 24px; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 16px; }
.info-item { display: flex; flex-direction: column; gap: 4px; }
.info-label { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-mono); }
.postmark-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.panel-box {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    margin-top: 16px;
}
.panel-box h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 12px; color: var(--text); }
.dns-snippet { display: flex; flex-direction: column; gap: 8px; }
.dns-snippet > div { font-size: 0.85rem; }
.hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }
.hidden { display: none !important; }

/* ─── Report Detail Modal ────────────────── */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}
.modal-box {
    position: relative;
    z-index: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 860px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-card);
}
.modal-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
}
.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px 8px;
    border-radius: 4px;
}
.modal-close:hover { background: var(--bg-hover); color: var(--text); }
.modal-body { padding: 24px; }
.report-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 20px;
}
.meta-item { display: flex; flex-direction: column; gap: 3px; }
.meta-label { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-mono); }
.section-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    margin-top: 4px;
}

/* ─── Toast ──────────────────────────────── */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 18px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 300;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 340px;
    border: 1px solid;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast-success { background: var(--green-bg); border-color: rgba(34,197,94,0.4); color: #86efac; }
.toast-error   { background: var(--red-bg);   border-color: rgba(239,68,68,0.4);   color: #fca5a5; }
.toast-warning { background: var(--amber-bg); border-color: rgba(245,158,11,0.4);  color: #fcd34d; }
.toast-info    { background: var(--blue-bg);  border-color: rgba(96,165,250,0.4);  color: #93c5fd; }

/* ─── Spinner ────────────────────────────── */
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.spinning { display: inline-block; animation: spin 0.8s linear infinite; }

/* ─── Login ──────────────────────────────── */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg);
    background-image: 
        radial-gradient(ellipse at 20% 50%, rgba(61,110,245,0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(61,110,245,0.04) 0%, transparent 50%);
}
.login-container {
    width: 100%;
    max-width: 380px;
    padding: 24px;
}
.login-header { text-align: center; margin-bottom: 32px; }
.login-logo { margin-bottom: 16px; }
.login-title {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
}
.login-subtitle { font-size: 0.875rem; color: var(--text-muted); margin-top: 4px; }
.login-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
}
.login-hint { text-align: center; font-size: 0.75rem; color: var(--text-dim); margin-top: 14px; }

/* ─── Info List ──────────────────────────── */
.info-list { padding: 8px 0; }
.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 24px;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}
.info-row:last-child { border-bottom: none; }
.info-row span:first-child { color: var(--text-muted); }
.info-row span:last-child { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text); }

/* ─── Settings Grid ──────────────────────── */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.settings-grid .card { margin-bottom: 0; }
.settings-grid .card .form-group,
.settings-grid .card .btn { margin-left: 24px; }
.settings-grid .card .form-group { margin-right: 24px; margin-top: 20px; }
.settings-grid .card .btn { margin-bottom: 24px; }

/* ─── Guide Steps ────────────────────────── */
.guide-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--border); }
.guide-step {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--bg-card);
    gap: 10px;
}
.step-num {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.6;
    line-height: 1;
}
.step-content h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.step-content p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }
.step-content code { font-size: 0.72rem; }

/* ─── Scrollbar ──────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #3a405a; }

/* ─── Responsive ─────────────────────────── */
@media (max-width: 900px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .dns-cards  { grid-template-columns: 1fr; }
    .settings-grid { grid-template-columns: 1fr; }
    .guide-steps { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr 1fr; }
    .report-meta { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
    .main-content { padding: 20px 16px 40px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .page-header { flex-direction: column; }
    .navbar-links { gap: 0; }
    .nav-link { padding: 6px 10px; font-size: 0.82rem; }
}