:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --card-hover: #21262d;
    --accent: #58a6ff;
    --accent-hover: #3182ce;
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --border: #30363d;
    --toast-bg: #2ea043;
    --toast-text: #ffffff;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.app-container {
    width: 100%;
    max-width: 900px;
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.app-header {
    text-align: center;
}

.app-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
    letter-spacing: -0.025em;
}

.app-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-main);
    background-color: var(--card-hover);
}

.tab-btn.active {
    color: var(--accent);
    background-color: rgba(88, 166, 255, 0.1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
    display: block;
}

.list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.list-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #ffffff;
}

.badge {
    background-color: var(--card-hover);
    color: var(--text-main);
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--border);
}

.action-btn {
    background-color: rgba(88, 166, 255, 0.1);
    color: var(--accent);
    border: 1px solid rgba(88, 166, 255, 0.4);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background-color: rgba(88, 166, 255, 0.2);
    border-color: var(--accent);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.name-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem 1rem;
    text-align: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.name-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border-color: var(--accent);
}

.name-card:active {
    transform: translateY(0);
}

.name-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: #ffffff;
    pointer-events: none;
    word-break: break-all;
}

.name-card::after {
    content: 'Click to copy';
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    opacity: 0;
    transition: all 0.3s ease;
}

.name-card:hover::after {
    bottom: 5px;
    opacity: 1;
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--toast-bg);
    color: var(--toast-text);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

.info-box {
    background-color: rgba(88, 166, 255, 0.05);
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.favorite-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease, color 0.2s ease;
    z-index: 2;
}

.favorite-btn:hover {
    transform: scale(1.2);
    color: #ffd700;
}

.favorite-btn.favorited {
    color: #ffd700;
}

.suggest-form {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

#suggest-input {
    flex: 1;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    color: #fff;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

#suggest-input:focus {
    border-color: var(--accent);
}

.report-btn {
    position: absolute;
    top: 8px;
    left: 8px;
    background: transparent;
    border: none;
    color: var(--border);
    font-size: 1.1rem;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.2s ease, color 0.2s ease;
    z-index: 2;
}

.report-btn:hover {
    transform: scale(1.1);
    color: #dc2626;
}

.app-footer {
    text-align: center;
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.app-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 2000;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-content h3 {
    margin-bottom: 1rem;
    color: #fff;
}

.modal-content p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.target-name {
    font-size: 1.5rem;
    color: var(--accent);
    font-weight: 600;
    margin: 1rem 0 1.5rem 0;
    word-break: break-all;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.modal-btn {
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.modal-btn.cancel {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--border);
}

.modal-btn.cancel:hover {
    background: var(--card-hover);
}

.modal-btn.confirm {
    background: #dc2626;
    color: #fff;
}

.modal-btn.confirm:hover {
    background: #b91c1c;
}

@media (max-width: 600px) {
    .app-container {
        padding: 1rem;
        gap: 1.5rem;
    }
    .app-header h1 {
        font-size: 2rem;
    }
    .tabs {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .tab-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
        flex: 1 1 calc(50% - 0.5rem);
    }
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: 0.75rem;
    }
    .name-card {
        height: 120px;
        padding: 1rem 0.5rem;
    }
    .name-text {
        font-size: 1.1rem;
    }
    .suggest-form {
        flex-direction: column;
    }
    .modal-actions {
        flex-direction: column;
    }
}