:root {
    --bg-primary: #050508;
    --bg-secondary: #0a0a10;
    --bg-tertiary: #111118;
    --bg-card: #0d0d14;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #00d4ff;
    --accent-light: #5ce1ff;
    --purple: #8b5cf6;
    --cyan: #00d4ff;
    --pink: #ec4899;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border: rgba(255,255,255,0.06);
    --border-light: rgba(255,255,255,0.1);
    --glass: rgba(255,255,255,0.03);
    --accent-glow: rgba(0, 212, 255, 0.4);
    --success-glow: rgba(16, 185, 129, 0.3);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

.bg-gradient {
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99,102,241,0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(139,92,246,0.1), transparent),
        radial-gradient(ellipse 60% 40% at 0% 80%, rgba(236,72,153,0.08), transparent);
    pointer-events: none;
    z-index: -2;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 3rem;
    background: rgba(10,10,16,0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-container { position: relative; width: 55px; height: 55px; }

.logo-glow {
    position: absolute;
    inset: -6px;
    background: linear-gradient(135deg, #00d4ff, #8b5cf6, #00d4ff);
    border-radius: 16px;
    filter: blur(15px);
    opacity: 0.6;
    animation: pulse-glow 2.5s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.08); }
}

.logo-img {
    position: relative;
    width: 55px !important;
    height: 55px !important;
    object-fit: contain;
    filter: drop-shadow(0 4px 15px rgba(0, 212, 255, 0.7));
    transition: filter 0.3s ease, transform 0.3s ease;
    border-radius: 12px;
}

.logo:hover .logo-img {
    filter: drop-shadow(0 6px 25px rgba(0, 212, 255, 1));
    transform: scale(1.08);
}

.logo-svg {
    position: relative;
    width: 55px;
    height: 55px;
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.6));
    transition: filter 0.3s ease, transform 0.3s ease;
}

.logo:hover .logo-svg {
    filter: drop-shadow(0 4px 20px rgba(99, 102, 241, 0.9));
    transform: scale(1.05);
}

.logo-text { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.5px; }

.logo-highlight {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links { display: flex; align-items: center; gap: 0.5rem; }

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    transition: all 0.3s;
    transform: translateX(-50%);
}

.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::before { width: 60%; }

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: all 0.3s;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.nav-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 25px var(--accent-glow); }

.nav-btn-outline {
    background: transparent;
    border: 1px solid var(--border-light);
    box-shadow: none;
}

.nav-btn-outline:hover { background: var(--glass); box-shadow: none; }

.nav-mobile { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

main { max-width: 1300px; margin: 0 auto; padding: 3rem 2rem; min-height: calc(100vh - 150px); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.75rem;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before { left: 100%; }

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px var(--accent-glow); }

.btn-secondary {
    background: var(--glass);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover { background: var(--bg-tertiary); border-color: var(--accent); }

.btn-success { background: linear-gradient(135deg, var(--success), #059669); color: white; }
.btn-danger { background: linear-gradient(135deg, var(--danger), #dc2626); color: white; }
.btn-warning { background: linear-gradient(135deg, var(--warning), #d97706); color: white; }
.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.85rem; }
.btn-icon { width: 40px; height: 40px; padding: 0; }

.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.6rem; color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; }

input, select, textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

input::placeholder { color: var(--text-muted); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.4s;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple), var(--pink));
    opacity: 0;
    transition: opacity 0.3s;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow), 0 0 60px rgba(99,102,241,0.15);
}

.card:hover::before { opacity: 1; }

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal.active { display: flex; }

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlide 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
}

@keyframes modalSlide {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 2rem; border-bottom: 1px solid var(--border); }
.modal-header h2 { font-size: 1.25rem; }

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    border-radius: 50%;
    transition: all 0.3s;
}

.modal-close:hover { background: var(--danger); color: white; transform: rotate(90deg); }

.modal-body { padding: 2rem; }

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-weight: 500;
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 2000;
}

.toast.show { opacity: 1; transform: translateY(0) scale(1); }
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.9rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success { background: rgba(16,185,129,0.15); color: var(--success); border: 1px solid rgba(16,185,129,0.3); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); border: 1px solid rgba(245,158,11,0.3); }

.grid { display: grid; gap: 1.75rem; }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-sm { font-size: 0.875rem; }

.footer { padding: 2rem; text-align: center; border-top: 1px solid var(--border); color: var(--text-muted); }

.empty-state { text-align: center; padding: 5rem 2rem; color: var(--text-secondary); }
.empty-state i { font-size: 4rem; margin-bottom: 1.5rem; opacity: 0.3; }
.empty-state p { font-size: 1.1rem; }

/* Price Lookup Styles */
.input-with-btn {
    display: flex;
    gap: 0.5rem;
}
.input-with-btn input {
    flex: 1;
}
.input-with-btn .btn {
    flex-shrink: 0;
}

.price-result-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-bottom: 1rem;
}

.price-loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 1rem;
}

.price-header {
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--cyan);
}

.price-header.error {
    color: var(--danger);
}

.price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.price-stat {
    text-align: center;
    padding: 0.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.price-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.price-value {
    font-weight: 700;
    font-size: 1.1rem;
}

.price-value.low { color: var(--success); }
.price-value.avg { color: var(--cyan); }
.price-value.high { color: var(--warning); }

.price-sources {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.source-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    padding: 0.35rem 0.75rem;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.source-price {
    font-weight: 600;
    color: var(--success);
}

.source-na {
    color: var(--text-muted);
    font-style: italic;
}

.source-link {
    color: var(--cyan);
    font-size: 0.8rem;
}

.price-recommend {
    background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(139,92,246,0.1));
    border: 1px solid var(--cyan);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.price-recommend i {
    color: var(--warning);
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }

@media (max-width: 768px) {
    .navbar { padding: 1rem 1.5rem; }
    .nav-links { display: none; }
    .nav-mobile { display: block; }
    main { padding: 2rem 1rem; }
    .grid-3 { grid-template-columns: 1fr; }
}