/* STELLARIUM · 世界级宇宙星图 UI 设计系统 */

:root {
    --accent: #6ea8ff;
    --accent-2: #b388ff;
    --accent-glow: rgba(110, 168, 255, 0.55);
    --gradient-accent: linear-gradient(135deg, #6ea8ff 0%, #b388ff 100%);
    --gradient-confirm: linear-gradient(135deg, #4dd0a0 0%, #56e0c8 100%);
    --text-1: #f4f7ff;
    --text-2: #b8c4e0;
    --text-3: #8290b3;
    --glass-bg: rgba(22, 28, 48, 0.72);
    --glass-bg-strong: rgba(18, 23, 42, 0.92);
    --glass-border: rgba(150, 175, 230, 0.16);
    --glass-border-hi: rgba(150, 175, 230, 0.32);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.55);
    --r-sm: 10px;
    --r-md: 16px;
    --r-lg: 22px;
    --r-pill: 999px;
    --sp-1: 6px;
    --sp-2: 10px;
    --sp-3: 16px;
    --sp-4: 24px;
    --blur: 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }

body {
    font-family: 'Inter', -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow: hidden;
    color: var(--text-1);
    background:
        radial-gradient(1200px 800px at 75% -10%, rgba(95, 120, 220, 0.18), transparent 60%),
        radial-gradient(1000px 700px at 10% 110%, rgba(150, 100, 220, 0.16), transparent 60%),
        linear-gradient(160deg, #0a0e1f 0%, #070a16 55%, #04060f 100%);
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
}

#canvas-container { position: fixed; inset: 0; width: 100vw; height: 100vh; }

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* ===== 顶部状态栏 ===== */
#topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 64px;
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: 0 var(--sp-4);
    z-index: 100;
    background: linear-gradient(180deg, rgba(8, 11, 22, 0.85) 0%, rgba(8, 11, 22, 0) 100%);
    pointer-events: none;
}
#topbar > * { pointer-events: auto; }

.brand { display: flex; align-items: center; gap: var(--sp-2); }
.brand-mark {
    font-size: 22px;
    color: var(--accent);
    text-shadow: 0 0 16px var(--accent-glow);
    animation: twinkle 3s ease-in-out infinite;
}
@keyframes twinkle {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 2px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.brand-sub { font-size: 10px; color: var(--text-3); letter-spacing: 3px; }

.stat-cluster {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    margin-left: var(--sp-3);
    flex: 1;
}
.stat-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-pill);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    white-space: nowrap;
}
.stat-chip::before { content: attr(data-icon); color: var(--accent); font-size: 11px; }
.stat-chip span { color: var(--text-1); font-weight: 600; }

.icon-btn {
    width: 38px; height: 38px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-1);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    transition: all 0.2s ease;
}
.icon-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 18px var(--accent-glow);
    color: var(--accent);
}


/* ===== 通用玻璃卡片 ===== */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-md);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow-md);
}
.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-2);
}
.close-x {
    background: rgba(255,255,255,0.06);
    border: none;
    color: var(--text-2);
    width: 28px; height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
}
.close-x:hover { background: rgba(255,255,255,0.16); color: var(--text-1); }

/* ===== 操作指南浮层 ===== */
#instructions {
    position: fixed;
    top: 74px;
    right: var(--sp-4);
    width: 240px;
    padding: var(--sp-3);
    z-index: 95;
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}
#instructions.open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
#instructions h3 { font-size: 14px; color: var(--text-1); font-weight: 600; }
.help-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.help-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-2);
}
.help-list kbd {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-1);
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    padding: 3px 8px;
    min-width: 30px;
    text-align: center;
}

/* ===== 底部主操作栏 Dock ===== */
#dock {
    position: fixed;
    bottom: var(--sp-4);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--sp-1);
    padding: var(--sp-1);
    z-index: 100;
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-pill);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow-lg);
}
.dock-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: var(--r-pill);
    background: transparent;
    color: var(--text-2);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.dock-btn .dock-ico { font-size: 15px; }
.dock-btn:hover { color: var(--text-1); background: rgba(255,255,255,0.06); }
.dock-btn.primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.dock-btn.primary:hover { filter: brightness(1.08); color: #fff; }
.dock-btn.active {
    color: var(--accent);
    background: rgba(110, 168, 255, 0.14);
    box-shadow: inset 0 0 0 1px var(--accent-glow);
}

/* ===== 星体详情卡片 ===== */
#star-detail {
    position: fixed;
    right: var(--sp-4);
    bottom: 100px;
    width: 260px;
    padding: var(--sp-4);
    z-index: 96;
    opacity: 0;
    transform: translateY(12px) scale(0.96);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
#star-detail.open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
#star-detail .close-x { position: absolute; top: 14px; right: 14px; }
.detail-orb {
    width: 54px; height: 54px;
    border-radius: 50%;
    margin-bottom: var(--sp-3);
    background: radial-gradient(circle at 35% 30%, #fff, #6ea8ff 55%, #6ea8ff);
    box-shadow: 0 0 24px var(--accent-glow);
}
#detail-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--sp-3);
    color: var(--text-1);
}
.detail-rows { display: flex; flex-direction: column; gap: 10px; }
.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.detail-row:last-child { border-bottom: none; padding-bottom: 0; }
.dk { color: var(--text-3); }
.dv { color: var(--text-1); font-weight: 500; font-family: 'JetBrains Mono', monospace; font-size: 12px; }

/* ===== 创建星体弹窗 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(4, 6, 15, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal-card {
    width: 420px;
    max-width: 92vw;
    max-height: 88vh;
    overflow-y: auto;
    padding: var(--sp-4);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border-hi);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.96);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-overlay.open .modal-card { transform: translateY(0) scale(1); }
.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-4);
}
.modal-head h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-1);
}

.field { margin-bottom: var(--sp-4); }
.field > label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-3);
    margin-bottom: var(--sp-2);
    text-transform: uppercase;
}
.field input[type="text"] {
    width: 100%;
    padding: 13px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--text-1);
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-sm);
    transition: all 0.2s ease;
}
.field input::placeholder { color: var(--text-3); }
.field input:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(110, 168, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(110, 168, 255, 0.15);
}

/* 类型卡片选择器 */
.type-picker { display: flex; gap: var(--sp-2); }
.type-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    background: rgba(255,255,255,0.04);
    border: 1.5px solid var(--glass-border);
    border-radius: var(--r-md);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}
.type-emoji { font-size: 26px; }
.type-name { font-size: 13px; color: var(--text-2); font-weight: 500; }
.type-card:hover { border-color: var(--glass-border-hi); background: rgba(255,255,255,0.07); }
.type-card.selected {
    border-color: var(--accent);
    background: rgba(110, 168, 255, 0.14);
    box-shadow: 0 0 18px rgba(110, 168, 255, 0.25);
}
.type-card.selected .type-name { color: var(--text-1); }

/* 颜色色板 */
.swatches { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.swatch {
    width: 38px; height: 38px;
    border-radius: 50%;
    border: 2px solid transparent;
    background: var(--sw);
    cursor: pointer;
    position: relative;
    transition: transform 0.15s ease, box-shadow 0.2s ease;
    box-shadow: 0 0 0 1px rgba(255,255,255,0.12);
}
.swatch:hover { transform: scale(1.12); }
.swatch.selected {
    border-color: #fff;
    box-shadow: 0 0 0 2px var(--sw), 0 0 16px var(--sw);
    transform: scale(1.1);
}

/* 弹窗按钮 */
.modal-actions { display: flex; gap: var(--sp-2); margin-top: var(--sp-3); }
.btn {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: var(--r-sm);
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn.ghost { background: rgba(255,255,255,0.08); color: var(--text-2); }
.btn.ghost:hover { background: rgba(255,255,255,0.14); color: var(--text-1); }
.btn.solid { background: var(--gradient-accent); color: #fff; box-shadow: 0 4px 18px var(--accent-glow); }
.btn.solid:hover { filter: brightness(1.08); }
.btn:active { transform: scale(0.97); }

/* ===== Toast 提示 ===== */
#toast {
    position: fixed;
    top: 78px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    padding: 12px 22px;
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border-hi);
    border-radius: var(--r-pill);
    color: var(--text-1);
    font-size: 14px;
    font-weight: 500;
    z-index: 250;
    opacity: 0;
    pointer-events: none;
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow-md);
    transition: opacity 0.3s ease, transform 0.3s ease;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== 玻璃胶囊（放置提示 / 坐标HUD） ===== */
.glass-pill {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 22px;
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: var(--r-md);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow-md);
    z-index: 150;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}
.glass-pill.show { opacity: 1; }
#placing-hint {
    top: 80px;
    text-align: center;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-1);
    max-width: 90vw;
}
#place-hud {
    bottom: 100px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--accent);
    white-space: nowrap;
    border-radius: var(--r-pill);
    padding: 9px 18px;
}

/* ===== 中心准星 ===== */
#crosshair {
    position: fixed;
    top: 50%; left: 50%;
    width: 36px; height: 36px;
    transform: translate(-50%, -50%);
    z-index: 140;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
}
#crosshair.show { opacity: 1; }
#crosshair::before, #crosshair::after {
    content: '';
    position: absolute;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}
#crosshair::before { width: 2px; height: 36px; left: 17px; }
#crosshair::after { height: 2px; width: 36px; top: 17px; }

/* ===== 放置控制条 ===== */
#place-controls {
    position: fixed;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--sp-2);
    z-index: 160;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}
#place-controls.show { opacity: 1; pointer-events: auto; }
.place-ctrl-btn {
    padding: 14px 22px;
    border: 1px solid var(--glass-border);
    border-radius: var(--r-pill);
    background: var(--glass-bg-strong);
    color: var(--text-1);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    touch-action: none;
    user-select: none;
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
}
.place-ctrl-btn:active { transform: scale(0.95); }
.place-ctrl-btn.confirm { background: var(--gradient-confirm); color: #04241b; border-color: transparent; }
.place-ctrl-btn.cancel { color: var(--text-2); }

/* ===== 移动端触摸控件（默认隐藏） ===== */
#joystick-zone, #vertical-controls { display: none; }

body.touch-device #joystick-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    position: fixed;
    left: 24px;
    bottom: 100px;
    z-index: 120;
}
#joystick-base {
    width: 116px; height: 116px;
    border-radius: 50%;
    background: rgba(110, 168, 255, 0.06);
    border: 1px solid rgba(150, 175, 230, 0.28);
    position: relative;
    touch-action: none;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}
#joystick-stick {
    width: 50px; height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(110,168,255,0.65) 0%, rgba(179,136,255,0.65) 100%);
    border: 2px solid rgba(255,255,255,0.55);
    position: absolute;
    left: 50%; top: 50%;
    margin-left: -25px; margin-top: -25px;
    box-shadow: 0 0 18px var(--accent-glow);
    transition: transform 0.05s;
}
.joy-label { font-size: 11px; color: var(--text-3); letter-spacing: 2px; }

body.touch-device #vertical-controls {
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: fixed;
    right: 24px;
    bottom: 100px;
    z-index: 120;
}
.touch-btn {
    width: 62px; height: 62px;
    border-radius: 50%;
    background: rgba(110, 168, 255, 0.08);
    border: 1px solid rgba(150, 175, 230, 0.28);
    color: var(--text-1);
    font-size: 20px;
    touch-action: none;
    user-select: none;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
    cursor: pointer;
}
.touch-btn:active { background: rgba(110, 168, 255, 0.4); }

/* 放置模式时给摇杆/升降让位（上移避免与控制条重叠） */
body.placing.touch-device #place-controls { bottom: 180px; }

/* ===== 响应式：手机/小屏 ===== */
@media (max-width: 768px) {
    #topbar { height: 56px; padding: 0 var(--sp-3); gap: var(--sp-2); }
    .brand-text { display: none; }
    .stat-cluster { margin-left: 6px; gap: 6px; overflow-x: auto; }
    .stat-chip { padding: 6px 10px; font-size: 11px; }
    /* 移动端只保留核心两个芯片 */
    #fps, #storage-mode { display: none; }

    #dock { bottom: 16px; gap: 2px; padding: 5px; }
    .dock-btn { padding: 11px 14px; font-size: 13px; }
    .dock-btn .dock-label { display: none; }
    .dock-btn.primary .dock-label { display: inline; }
    .dock-btn .dock-ico { font-size: 18px; }

    #instructions { width: calc(100vw - 32px); right: 16px; }

    #star-detail {
        right: 50%;
        transform: translateX(50%) translateY(12px) scale(0.96);
        bottom: 88px;
        width: calc(100vw - 32px);
        max-width: 340px;
    }
    #star-detail.open { transform: translateX(50%) translateY(0) scale(1); }

    .modal-card { padding: var(--sp-3); }
    .modal-head h3 { font-size: 19px; }

    #placing-hint { top: 66px; font-size: 12px; padding: 10px 16px; }
    #place-hud { bottom: 184px; font-size: 12px; }

    #place-controls {
        bottom: 184px;
        flex-wrap: wrap;
        justify-content: center;
        max-width: 94vw;
    }
    .place-ctrl-btn { padding: 12px 16px; font-size: 13px; }
}

/* 横屏小高度设备：压缩纵向间距 */
@media (max-height: 480px) {
    #joystick-zone, #vertical-controls { bottom: 80px; }
    #dock { bottom: 12px; }
}