/* طراحی یکپارچه ایرانی — نسخهٔ جذاب و پرامکانات */
:root {
    --bg: #f8f6f2;
    --bg-subtle: #efeae3;
    --card: #ffffff;
    --primary: #0f3460;
    --primary-hover: #1a4a7a;
    --accent: #e94560;
    --accent-soft: rgba(233, 69, 96, 0.12);
    --teal: #0d7377;
    --teal-soft: rgba(13, 115, 119, 0.12);
    --gold: #c9a227;
    --gold-soft: rgba(201, 162, 39, 0.15);
    --text: #1a1a1a;
    --text-muted: #5a5a5a;
    --border: #e2ddd6;
    --shadow: 0 8px 32px rgba(15, 52, 96, 0.08);
    --shadow-hover: 0 12px 40px rgba(15, 52, 96, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --nav-height: 60px;
    --transition: 0.25s ease;
}

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

body {
    font-family: 'Vazirmatn', 'Vazir', Tahoma, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    background-image:
        radial-gradient(ellipse 100% 60% at 50% -30%, var(--teal-soft), transparent 55%),
        radial-gradient(ellipse 80% 40% at 100% 50%, var(--accent-soft), transparent 50%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-subtle) 100%);
}

/* نوار ناوبری */
.site-nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0 28px;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    box-shadow: 0 1px 0 rgba(0,0,0,0.04);
}

.site-nav__brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition);
}

.site-nav__brand:hover {
    color: var(--accent);
}

.site-nav__brand svg {
    width: 24px;
    height: 24px;
    opacity: 0.9;
}

.site-nav__links {
    display: flex;
    gap: 6px;
    align-items: center;
}

.site-nav__links a {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition), background var(--transition), transform 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.site-nav__links a:hover {
    color: var(--primary);
    background: var(--accent-soft);
    transform: translateY(-1px);
}

.site-nav__links a.active {
    color: var(--primary);
    background: var(--teal-soft);
    font-weight: 600;
}

.site-nav__links a svg {
    width: 18px;
    height: 18px;
    opacity: 0.85;
}

/* محتوای اصلی */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 28px 24px;
}

.container {
    width: 100%;
    max-width: 480px;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 36px 32px;
    border: 1px solid var(--border);
    transition: box-shadow var(--transition), transform 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

.card__header {
    text-align: center;
    margin-bottom: 28px;
}

.card__icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--teal-soft), var(--accent-soft));
    border-radius: 14px;
    color: var(--primary);
}

.card__icon svg {
    width: 28px;
    height: 28px;
}

.card__title {
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.card__desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.badge {
    display: inline-block;
    margin-top: 10px;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--teal);
    background: var(--teal-soft);
    border-radius: 20px;
}

/* ناحیه کشیدن و رها کردن فایل */
.dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 24px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    background: var(--bg);
    margin-bottom: 4px;
}

.dropzone:hover,
.dropzone.is-dragover {
    border-color: var(--teal);
    background: var(--teal-soft);
}

.dropzone__icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 10px;
    color: var(--text-muted);
    opacity: 0.8;
}

.dropzone__text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.dropzone__text strong {
    color: var(--primary);
}

.dropzone__hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    opacity: 0.9;
}

.dropzone input[type="file"] {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
    pointer-events: none;
}

.file-name {
    font-size: 0.85rem;
    color: var(--teal);
    margin-top: 8px;
    font-weight: 500;
    display: none;
}

.file-name.is-visible {
    display: block;
}

/* فرم */
.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.input-wrap {
    position: relative;
}

input[type="file"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 14px 44px 14px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fff;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px var(--teal-soft);
}

.password-toggle {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-muted);
    border-radius: 6px;
    transition: color var(--transition), background var(--transition);
}

.password-toggle:hover {
    color: var(--primary);
    background: var(--teal-soft);
}

.password-toggle svg {
    width: 20px;
    height: 20px;
}

.hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.5;
}

/* دکمه‌ها */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 16px 24px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition), transform 0.15s ease, box-shadow var(--transition);
    margin-top: 10px;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn:active:not(:disabled) {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
    box-shadow: 0 4px 14px rgba(15, 52, 96, 0.25);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
    box-shadow: 0 6px 20px rgba(15, 52, 96, 0.3);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--teal-soft);
    border-color: var(--teal);
    color: var(--teal);
}

.btn .spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-left: 8px;
}

.btn.is-loading .spinner {
    display: inline-block !important;
}

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

/* هشدار */
.alert {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert-error {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* فوتر */
.site-footer {
    text-align: center;
    padding: 24px 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-shrink: 0;
    background: rgba(255,255,255,0.5);
    border-top: 1px solid var(--border);
}

.site-footer a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition);
}

.site-footer a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.site-footer__links {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 24px;
}

/* encoder */
.encoder-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.encoder-action {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    text-align: right;
    transition: border-color var(--transition), background var(--transition), transform 0.15s ease;
}

.encoder-action:hover {
    background: var(--teal-soft);
    border-color: var(--teal);
    transform: translateX(-4px);
}

.encoder-action svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    opacity: 0.85;
}

.cli-box {
    margin-top: 20px;
    padding: 14px 18px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: ui-monospace, monospace;
    white-space: pre-wrap;
    direction: ltr;
    text-align: left;
    border: 1px solid var(--border);
}

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

/* واکنش‌گرا */
@media (max-width: 560px) {
    .site-nav {
        flex-direction: column;
        height: auto;
        padding: 14px 16px;
        gap: 12px;
    }
    .site-nav__links {
        flex-wrap: wrap;
        justify-content: center;
    }
    .site-nav__links a {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    .main {
        padding: 20px 16px;
    }
    .card {
        padding: 28px 20px;
    }
    .card__title {
        font-size: 1.35rem;
    }
    .card__icon {
        width: 48px;
        height: 48px;
    }
    .card__icon svg {
        width: 24px;
        height: 24px;
    }
}