@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-Regular.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-Medium.woff2') format('woff2');
    font-weight: 500;
    font-display: swap;
}
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-display: swap;
}
@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-Bold.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}

:root {
    --bg: #0B1220;
    --bg-elevated: #121B2E;
    --card: #16223A;
    --card-border: #223252;
    --text-primary: #E7ECF5;
    --text-secondary: #94A3BD;
    --accent: #38BDF8;
    --accent-strong: #0EA5E9;
    --accent-soft: rgba(56, 189, 248, 0.12);
    --danger: #F87171;
    --danger-soft: rgba(248, 113, 113, 0.12);
    --radius: 10px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: radial-gradient(circle at 15% 0%, #16233F 0%, var(--bg) 45%);
    color: var(--text-primary);
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    line-height: 1.7;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    font-weight: 600;
}

.page {
    max-width: 1040px;
    margin: 0 auto;
    padding: 32px 24px 48px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.brand-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: var(--radius);
    background: var(--accent-soft);
    color: var(--accent);
}
.brand-mark svg {
    width: 24px;
    height: 24px;
}

h1 {
    font-size: 1.35rem;
    margin: 0 0 4px;
    color: var(--text-primary);
}

.subtitle {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 560px;
}

.version-badge {
    font-size: 0.78rem;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid rgba(56, 189, 248, 0.3);
    padding: 5px 12px;
    border-radius: 999px;
    white-space: nowrap;
}

.layout {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 20px;
    align-items: start;
}

@media (max-width: 860px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px;
}

.field-group {
    margin-bottom: 20px;
    border: none;
    padding: 0;
}

legend {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0;
    margin-bottom: 10px;
}

label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.field-inline {
    max-width: 160px;
    margin-bottom: 12px;
}

input[type="text"],
input[type="number"] {
    width: 100%;
    background: var(--bg-elevated);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    font-size: 0.9rem;
    transition: border-color 0.15s ease;
}

input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--accent);
}

.hint {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin: 6px 0 0;
}

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

@media (max-width: 480px) {
    .checkbox-grid,
    .radio-grid {
        grid-template-columns: 1fr;
    }
}

.checkbox,
.radio {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    background: var(--bg-elevated);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 10px 12px;
    margin: 0;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.radio small {
    display: block;
    color: var(--text-secondary);
    font-size: 0.72rem;
    margin-top: 2px;
}

.checkbox input,
.radio input {
    accent-color: var(--accent);
    margin-top: 3px;
    flex-shrink: 0;
}

.btn-primary {
    width: 100%;
    background: var(--accent-strong);
    color: #05202E;
    border: none;
    border-radius: 8px;
    padding: 12px 16px;
    font-family: 'Vazirmatn', Tahoma, sans-serif;
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    transition: background 0.15s ease;
}

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

.result-card {
    min-height: 100%;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 12px;
    gap: 12px;
}

.empty-state svg {
    width: 40px;
    height: 40px;
    color: var(--text-secondary);
    opacity: 0.6;
}

.result-block {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-row label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.85rem;
}

.copy-field {
    display: flex;
    gap: 8px;
}

.copy-field input {
    flex: 1;
}

.btn-copy {
    background: var(--bg-elevated);
    border: 1px solid var(--card-border);
    color: var(--accent);
    border-radius: 8px;
    width: 40px;
    flex-shrink: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.15s ease;
}

.btn-copy:hover {
    border-color: var(--accent);
}

.btn-copy svg {
    width: 18px;
    height: 18px;
}

.btn-copy.copied {
    color: #34D399;
    border-color: #34D399;
}

.strength {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.78rem;
    padding: 4px 10px;
    border-radius: 999px;
}

.strength-1 { color: var(--danger); background: var(--danger-soft); }
.strength-2 { color: #FBBF24; background: rgba(251, 191, 36, 0.12); }
.strength-3 { color: var(--accent); background: var(--accent-soft); }
.strength-4 { color: #34D399; background: rgba(52, 211, 153, 0.12); }

.alert {
    background: var(--danger-soft);
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: var(--danger);
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 0.85rem;
}

.page-footer {
    margin-top: 28px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-decoration: none;
    background: var(--bg-elevated);
    border: 1px solid var(--card-border);
    padding: 5px 12px;
    border-radius: 999px;
    transition: border-color 0.15s ease, color 0.15s ease;
    white-space: nowrap;
}

.back-link:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.back-link svg {
    width: 14px;
    height: 14px;
}