/* --- CSS Variables (Shared Theme) --- */
:root {
    --primary-color: #f59e0b; /* Amber 500 */
    --primary-hover: #d97706; /* Amber 600 */
    --color-red: #ef4444;
    /* Light Theme */
    --bg-body: #f8fafc;
    --bg-color: #f5f7fa;
    --bg-card: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.95);
    --bg-white: #ffffff; /* 卡片背景 */

    --text-main: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --input-bg: #ffffff;
    --bg-gradient-start: #f1f5f9;
    --bg-gradient-end: #e2e8f0;
    /* Picker Specific */
    --picker-bg: #ffffff;
    --picker-text: #1e293b;
    --picker-highlight: rgba(0,0,0,0.05);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-lg: 12px;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --info-color: #3b82f6;
    --warning-color: #f97316;
    --text-muted: #999999;
}

html.dark {
    /* Dark Theme */
    --bg-body: #020617; /* Slate 950 */
    --bg-card: rgba(30, 41, 59, 0.5);
    --bg-nav: rgba(15, 23, 42, 0.9);
    --text-main: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(15, 23, 42, 0.6);
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #1e293b;
    /* Picker Specific */
    --picker-bg: #0f172a;
    --picker-text: #f8fafc;
    --picker-highlight: rgba(255,255,255,0.1);
}

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

a, a:link, a:visited, a:hover, a:active {
    color: var(--text-main);
    text-decoration: none
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color 0.3s;
}

/* Stars Background */
.stars-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image: radial-gradient(1px 1px at 20px 30px, #fff, transparent), radial-gradient(2px 2px at 100px 80px, #fff, transparent);
    background-size: 200px 200px;
    opacity: 0;
    transition: opacity 0.5s;
}

html.dark .stars-bg {
    opacity: 0.15;
}

/* --- Layout --- */



/* --- Navbar (Fully Featured) --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    background: var(--bg-nav);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
}

.yin-dot {
    color: #94a3b8;
}

html.dark .yin-dot {
    color: #475569;
}

.logo-title {
    font-family: 'Noto Serif SC', serif;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-subtitle {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-secondary);
}

/* Desktop Links */
.nav-links {
    display: flex;
    gap: 0.5rem;
    background: rgba(255,255,255,0.05);
    padding: 0.35rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
}

.nav-btn {
    padding: 0.35rem 1.25rem;
    font-size: 0.875rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: 0.2s;
}

    .nav-btn:hover {
        background-color: var(--bg-body);
        color: var(--text-main);
       
    }

    .nav-btn.active {
        background-color: var(--text-main);
        color: var(--bg-card);
       
    }



/* Right Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.icon-btn {
    position: relative;
    background: none;
    border: none;
    padding: 0.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

    .icon-btn:hover {
        color: var(--primary-color);
        background: rgba(255,255,255,0.05);
    }

/* Cart Badge */
.badge-count {
    position: absolute;
    top: -2px;
    right: -2px;
    background: var(--color-red);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Auth Section */
.auth-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-text-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem;
}

    .nav-text-btn:hover {
        color: var(--text-main);
    }

.nav-cta-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.3rem 1rem 0.4rem 1rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s;
}

    .nav-cta-btn:hover {
        background: var(--primary-hover);
        /*transform: translateY(-1px);*/
    }

/* User Profile Mini */


.user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 4px 12px 4px 4px;
    border-radius: 99px;
    cursor: pointer;
    transition: all 0.2s;
}

    .user-btn:hover {
        border-color: var(--primary-color);
    }

 .nav_user-avatar {
        width: 28px;
        height: 28px;
        background: var(--primary-color);
        color: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        font-weight: bold;
    }

.nav_user-name {
    font-size: 12px;
    font-weight: bold;
    max-width: 80px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}





/* Theme Icons */
.icon-moon {
    display: block;
}

.icon-sun {
    display: none;
}

html.dark .icon-moon {
    display: none;
}

html.dark .icon-sun {
    display: block;
}

/* Language Dropdown */
.lang-dropdown-container {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    text-transform: uppercase;
}

    .lang-btn:hover {
        border-color: var(--primary-color);
        color: var(--primary-color);
    }

.lang-menu {
    position: absolute;
    top: 90%;
    right: 0;
    margin-top: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 0.5rem;
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 100px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    backdrop-filter: blur(12px);
    z-index: 60;
}

.lang-dropdown-container:hover .lang-menu {
    /*display: flex;
    animation: fadeIn 0.2s;
        */
}

.lang-menu button {
    background: none;
    border: none;
    text-align: left;
    padding: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-radius: 0.25rem;
    cursor: pointer;
    transition: 0.1s;
}

    .lang-menu button:hover {
        background: rgba(245, 158, 11, 0.1);
        color: var(--primary-color);
    }

/* Mobile Menu */
.mobile-toggle {
    display: none;
}

.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    z-index: 40;
    pointer-events: none;
    overflow: hidden;
}

.mobile-menu-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-nav);
    backdrop-filter: blur(16px);
    padding: 6rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.mobile-menu-overlay.open .mobile-menu-content {
    transform: translateX(0);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}


.mobile-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    transition: 0.2s;
}

    .mobile-link:hover {
        color: var(--primary-color);
    }

.mobile-auth-section {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    width: 100%;
}

.mobile-auth-btn {
    width: 100%;
    padding: 1rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-main);
    font-weight: 700;
    cursor: pointer;
}

    .mobile-auth-btn.primary {
        background: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
    }

.mobile-user-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.user-avatar.lg {
    width: 64px;
    height: 64px;
    font-size: 2rem;
}

.mobile-auth-btn.logout {
    border-color: var(--color-red);
    color: var(--color-red);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    .nav-links, .desktop-auth, #desktop-auth, .lang-dropdown-container {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }
}




/* --- Footer --- */
.app-footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: auto;
}


@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }

    to {
        transform: translateY(0);
    }
}