/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

:root {
    /* Colors */
    --void: #000000;
    --abyss: #0a0a0a;
    --midnight: #111111;
    --twilight: #1a1a1a;
    --shadow: #222222;
    --dusk: #333333;
    --stone: #444444;
    --smoke: #555555;
    --ash: #666666;
    --dust: #777777;
    --fog: #888888;
    --mist: #999999;
    --haze: #aaaaaa;
    --cloud: #bbbbbb;
    --silver: #cccccc;
    --pearl: #dddddd;
    --frost: #eeeeee;
    --glacier: #ffffff;
    
    /* Glass */
    --glass-dark: rgba(0, 0, 0, 0.2);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Glow */
    --glow-subtle: rgba(255, 255, 255, 0.02);
    --glow-gentle: rgba(255, 255, 255, 0.04);
    --glow-visible: rgba(255, 255, 255, 0.08);
    
    /* Shadows */
    --shadow-light: rgba(0, 0, 0, 0.25);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-deep: rgba(0, 0, 0, 0.6);
}

body {
    background: var(--void);
    color: var(--pearl);
    height: 100vh;
    overflow: hidden;
}

/* Background */
.grid-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--midnight) 1px, transparent 1px),
        linear-gradient(90deg, var(--midnight) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.03;
    z-index: -2;
}

.luminous-field {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 100vmax;
    height: 100vmax;
    background: radial-gradient(circle at center, var(--glow-gentle) 0%, transparent 65%);
    transform: translate(-50%, -50%);
    filter: blur(100px);
    z-index: -1;
    opacity: 0.2;
}

/* Main Layout */
.proxy-interface {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.browsing-surface {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: var(--void);
}

.browsing-frame {
    width: 100%;
    height: 100%;
    border: none;
    background: var(--void);
}

/* Navigation Panel */
.navigation-panel {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: var(--abyss);
    border-top: 1px solid var(--shadow);
    box-shadow: 0 -4px 20px var(--shadow-medium);
}

.nav-button {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 14px;
    color: var(--pearl);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-button:hover {
    background: var(--dusk);
    border-color: var(--stone);
    transform: translateY(-2px);
}

.nav-button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.nav-button:disabled:hover {
    background: var(--midnight);
    border-color: var(--shadow);
    transform: none;
}

/* Search */
.search-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex: 1;
    margin: 0 1rem;
}

.search-bar {
    flex: 1;
    height: 50px;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 14px;
    color: var(--glacier);
    font-size: 1rem;
    padding: 0 1.2rem;
    outline: none;
    transition: all 0.3s ease;
}

.search-bar:focus {
    border-color: var(--dusk);
    box-shadow: 0 0 0 1px var(--glow-visible);
}

.search-execute {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 14px;
    color: var(--pearl);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-execute:hover {
    background: var(--dusk);
    border-color: var(--stone);
    transform: translateY(-1px);
}

/* Toggle Buttons */
.bookmark-toggle,
.history-toggle {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 14px;
    color: var(--pearl);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.bookmark-toggle:hover,
.history-toggle:hover {
    background: var(--dusk);
    border-color: var(--stone);
    transform: translateY(-1px);
}

.bookmark-toggle.active {
    color: var(--frost);
    border-color: var(--glow-visible);
}

/* Server Status */
.server-status {
    padding: 0.5rem 1rem;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 10px;
    color: var(--frost);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Panels */
.history-panel,
.bookmark-panel {
    position: fixed;
    top: 0;
    width: 350px;
    height: 100%;
    background: var(--abyss);
    border: 1px solid var(--shadow);
    transition: transform 0.4s ease;
    z-index: 1000;
    box-shadow: -10px 0 60px var(--shadow-deep);
}

.history-panel {
    right: -400px;
    border-left: none;
}

.bookmark-panel {
    left: -400px;
    border-right: none;
}

.history-panel.active {
    right: 0;
}

.bookmark-panel.active {
    left: 0;
}

.panel-header {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--shadow);
}

.panel-title {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--frost);
}

.panel-close {
    background: none;
    border: none;
    color: var(--dust);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0.2rem 0.8rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.panel-close:hover {
    background: var(--midnight);
    color: var(--pearl);
}

.panel-content {
    padding: 1.5rem;
    overflow-y: auto;
    height: calc(100% - 70px);
}

/* List Items */
.history-item {
    padding: 1rem;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 12px;
    margin-bottom: 0.8rem;
    color: var(--silver);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    word-break: break-all;
}

.history-item:hover {
    background: var(--dusk);
    border-color: var(--stone);
    transform: translateX(-2px);
}

.bookmark-item {
    padding: 1rem;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 12px;
    margin-bottom: 0.8rem;
    color: var(--silver);
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.bookmark-item:hover {
    background: var(--dusk);
    border-color: var(--stone);
}

.remove-bookmark {
    background: none;
    border: none;
    color: var(--dust);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.remove-bookmark:hover {
    background: var(--shadow);
    color: var(--pearl);
}

.clear-history {
    width: 100%;
    padding: 1rem;
    background: var(--midnight);
    border: 1px solid var(--shadow);
    border-radius: 12px;
    color: var(--pearl);
    font-size: 0.95rem;
    cursor: pointer;
    margin-top: 1rem;
    transition: all 0.3s ease;
}

.clear-history:hover {
    background: var(--dusk);
    border-color: var(--stone);
}

/* Error Overlay */
.error-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.error-content {
    background: var(--abyss);
    border: 1px solid var(--shadow);
    border-radius: 20px;
    padding: 3rem;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 20px 60px var(--shadow-deep);
}

.error-content i {
    font-size: 4rem;
    color: var(--fog);
    margin-bottom: 1.5rem;
}

.error-content h3 {
    font-size: 1.8rem;
    color: var(--glacier);
    margin-bottom: 1rem;
}

.error-content p {
    color: var(--dust);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.error-retry,
.error-close {
    padding: 0.8rem 2rem;
    border: 1px solid var(--shadow);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0 0.5rem;
    background: var(--midnight);
    color: var(--pearl);
}

.error-retry:hover,
.error-close:hover {
    background: var(--dusk);
    border-color: var(--stone);
}

/* Hidden */
.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .navigation-panel {
        padding: 0.5rem;
        gap: 0.5rem;
    }
    
    .nav-button,
    .search-execute,
    .bookmark-toggle,
    .history-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .search-bar {
        height: 40px;
        font-size: 0.9rem;
        padding: 0 0.8rem;
    }
    
    .history-panel,
    .bookmark-panel {
        width: 100%;
    }
}