:root {
    --bg-color: #050505;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --accent-color: #007AFF;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --glass-blur: 15px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 40px 20px;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(0, 122, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(255, 0, 100, 0.05) 0%, transparent 40%);
    background-attachment: fixed;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 60px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 30px;
    letter-spacing: -0.05rem;
    background: linear-gradient(to bottom right, #fff, #999);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Search & Categories --- */
.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
}

.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
}

#search {
    width: 100%;
    padding: 16px 24px;
    border-radius: 100px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    color: white;
    font-size: 1.1rem;
    outline: none;
    transition: var(--transition);
}

#search:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(0, 122, 255, 0.2);
}

.categories {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.category-btn {
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    backdrop-filter: blur(5px);
}

.category-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.category-btn:hover:not(.active) {
    border-color: white;
    color: white;
}

/* --- Grid Layout --- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    position: relative;
    padding: 24px;
    border-radius: 24px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(var(--glass-blur));
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow: hidden;
    animation: fadeIn 0.5s ease forwards;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tag {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 0.7rem;
    padding: 4px 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.add-card-placeholder {
    border: 2px dashed rgba(255, 255, 255, 0.1);
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.add-card-placeholder:hover {
    border-color: var(--accent-color);
    background: rgba(0, 122, 255, 0.05);
    transform: translateY(-5px);
}

.add-card-placeholder .card-icon {
    margin-bottom: 10px;
    color: var(--accent-color);
    opacity: 0.6;
}

.add-card-placeholder:hover .card-icon {
    opacity: 1;
    transform: scale(1.1);
}

.delete-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
    z-index: 10;
}

.card:hover .delete-icon {
    opacity: 1;
}

.delete-icon:hover {
    background: #ff3b30;
    color: white;
    transform: scale(1.1);
}

.edit-pill {
    margin-top: auto;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    width: fit-content;
}

.edit-pill:hover {
    background: var(--accent-color);
    color: white;
}

/* --- Admin Panel --- */
.admin-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 100;
}

.admin-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: white;
}

.admin-btn:hover {
    background: var(--accent-color);
    transform: scale(1.1);
}

#add-link-btn {
    background: var(--accent-color);
}

/* Modal Styling */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.icon-search-box {
    display: flex;
    gap: 10px;
    align-items: center;
}

.icon-preview-large {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 10px;
    background: #222;
    border: 1px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
}

.modal-content {
    background: #111;
    padding: 30px;
    border-radius: 24px;
    width: 90%;
    max-width: 450px;
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.modal input,
.modal select,
.modal textarea {
    width: 100%;
    padding: 12px;
    background: #222;
    border: 1px solid #333;
    color: white;
    border-radius: 10px;
    outline: none;
}

.modal button {
    padding: 12px;
    border-radius: 10px;
    border: none;
    background: var(--accent-color);
    color: white;
    font-weight: 600;
    cursor: pointer;
}

.delete-btn {
    background: #ff3b30 !important;
    margin-top: 10px;
}

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

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

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

    .grid {
        grid-template-columns: 1fr;
    }
}
/* Notification / Toast */
#toast-container {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: rgba(44, 44, 46, 0.9);
    backdrop-filter: blur(10px);
    color: white;
    padding: 12px 24px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    font-size: 0.9rem;
    animation: toast-in 0.3s ease-out forwards;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.toast.fade-out {
    animation: toast-out 0.3s ease-in forwards;
}

@keyframes toast-out {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-20px); }
}

/* Input Group & Required Styling */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.required {
    color: #ff3b30;
    margin-left: 2px;
}

.modal-content input, 
.modal-content textarea, 
.modal-content select {
    margin-bottom: 0 !important; /* 取消原来的底部间距，由 group 统一控制 */
}