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

body {
    background: #0f0f1a;
    color: #e0e0e0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    padding: 20px 10px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #00d4ff;
    font-size: 1.8rem;
    margin-bottom: 24px;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

#fileName {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    border: 2px solid #2a2a4a;
    border-radius: 10px;
    background: #1a1a2e;
    color: #fff;
    font-size: 15px;
    outline: none;
    transition: border-color 0.3s;
}

#fileName:focus {
    border-color: #00d4ff;
}

#generateBtn {
    padding: 12px 28px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #00d4ff, #0088ff);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

#generateBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.3);
}

#generateBtn:active {
    transform: scale(0.97);
}

#clearBtn {
    padding: 12px 28px;
    border: 2px solid #ff4757;
    border-radius: 10px;
    background: transparent;
    color: #ff4757;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, color 0.3s;
}

#clearBtn:hover {
    background: #ff4757;
    color: #fff;
}

/* --- Result Blocks --- */
.result-block {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 14px;
    margin-bottom: 20px;
    overflow: hidden;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    background: #16213e;
    border-bottom: 1px solid #2a2a4a;
    flex-wrap: wrap;
    gap: 8px;
}

.result-header .file-label {
    color: #00d4ff;
    font-weight: 600;
    font-size: 14px;
    word-break: break-all;
}

.result-header .delete-btn {
    background: transparent;
    border: 1px solid #ff4757;
    color: #ff4757;
    padding: 5px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: background 0.2s, color 0.2s;
    flex-shrink: 0;
}

.result-header .delete-btn:hover {
    background: #ff4757;
    color: #fff;
}

.category-title {
    padding: 12px 18px 6px;
    font-size: 15px;
    font-weight: 700;
    color: #ffd32a;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-title .icon {
    font-size: 18px;
}

.link-list {
    padding: 6px 18px 16px;
}

.link-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #0f0f1a;
    border: 1px solid #2a2a4a;
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 8px;
    transition: border-color 0.3s;
}

.link-item:hover {
    border-color: #00d4ff;
}

.link-item .link-number {
    background: #2a2a4a;
    color: #00d4ff;
    font-weight: 700;
    font-size: 13px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.link-item .link-text {
    flex: 1;
    word-break: break-all;
    font-size: 13px;
    color: #b0b0cc;
    line-height: 1.5;
    user-select: all;
}

.link-item .copy-btn {
    background: #2a2a4a;
    border: none;
    color: #00d4ff;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: background 0.2s;
    flex-shrink: 0;
    white-space: nowrap;
}

.link-item .copy-btn:hover {
    background: #00d4ff;
    color: #0f0f1a;
}

.link-item .copy-btn.copied {
    background: #2ed573;
    color: #fff;
}

.divider {
    border: none;
    border-top: 1px solid #2a2a4a;
    margin: 4px 18px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: #2ed573;
    color: #0f0f1a;
    padding: 10px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    z-index: 9999;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
}

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

@media (max-width: 500px) {
    h1 { font-size: 1.4rem; }
    .link-item .link-text { font-size: 11.5px; }
    .input-group { flex-direction: column; }
    #generateBtn, #clearBtn { width: 100%; }
}