:root {
    --bg-light: #ffffff;
    --text-light: #1d1d1f;
    --bg-dark: #000000;
    --text-dark: #f5f5f7;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --card-light: #fbfbfd;
    --card-dark: #1d1d1f;
    --border-light: rgba(0, 0, 0, 0.1);
    --border-dark: rgba(255, 255, 255, 0.1);
    --success: #34c759;
    --error: #ff3b30;
}

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

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

@keyframes scaleIn {
    from {
        transform: scale(0.95);
    }

    to {
        transform: scale(1);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background: var(--bg-light);
    color: var(--text-light);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    line-height: 1.5;
    font-weight: 400;
}

body.dark {
    background: var(--bg-dark);
    color: var(--text-dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    animation: fadeIn 0.6s ease-out;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.dark .header {
    border-bottom-color: var(--border-dark);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--accent), #6c47ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tab-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    padding: 0.5rem;
    background: var(--card-light);
    border-radius: 20px;
    width: fit-content;
}

.dark .tab-container {
    background: var(--card-dark);
}

.tab {
    padding: 0.8rem 1.5rem;
    border-radius: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    font-weight: 700;
    user-select: none;
}

.tab:hover:not(.active) {
    background: rgba(0, 0, 0, 0.05);
}

.dark .tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.05);
}

.tab.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 113, 227, 0.3);
}

/* بهبود افکت hover برای دکمه تغییر تم */
#themeSwitch:hover {
    background: var(--accent-hover);
    transform: scale(1.1);
}

.material-symbols-rounded {
    font-size: 20px;
}

.input-group {
    margin-bottom: 2rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.input-field {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    background: var(--bg-light);
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

.dark .input-field {
    background: var(--card-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.input-field:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.locations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.location-card {
    background: var(--card-light);
    border-radius: 20px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-light);
}

.location-card.active {
    border: 2px solid var(--accent);
}

.dark .location-card {
    background: var(--card-dark);
    border-color: var(--border-dark);
}

.location-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.dark .location-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.flag-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 15px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 15px rgba(0, 113, 227, 0.3);
}

.button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 113, 227, 0.4);
}

.button:active {
    transform: translateY(0);
}

/* نمایش خروجی DNS به صورت گرید کارتی */
.dns-output {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* استایل کارت‌های DNS */
.dns-card {
    background: var(--card-light);
    border-radius: 20px;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.dark .dns-card {
    background: var(--card-dark);
    border-color: var(--border-dark);
}

.dns-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.dark .dns-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* مشخصات کانفیگ وایرگارد (بخش خروجی) */
.output-container {
    margin-top: 2rem;
    padding: 1rem;
    border: 1px solid var(--border-light);
    border-radius: 10px;
    background: #1a1a1aaf;
    /* پس‌زمینه دلخواه */
    color: #fff;
    white-space: pre-wrap;
    font-family: monospace;
    direction: ltr;
    text-align: left;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 1rem 2rem;
    border-radius: 15px;
    color: white;
    font-weight: 700;
    display: none;
    animation: scaleIn 0.3s ease-out;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--error);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .tab-container {
        width: 100%;
        overflow-x: auto;
        padding: 0.5rem;
    }

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