/* ============================================================
   三风格皮肤层 — data-style 与 data-theme 正交组合
   system=赛博穿越 · girlfriend=暧昧高级 · office=商务职业
   ============================================================ */

/* ---------- 系统 · 赛博穿越（亮） ---------- */
[data-style="system"] {
    --bg-gradient: linear-gradient(135deg, #eef4fb 0%, #e4eefa 50%, #edeff9 100%);
    --bg-primary: #f2f6fb;
    --bg-secondary: rgba(255,255,255,0.9);
    --bg-tertiary: rgba(238,248,255,0.7);
    --bg-hover: rgba(224,240,252,0.85);
    --text-primary: #10233a;
    --text-secondary: #4c6a8c;
    --text-muted: #8fa9c4;
    --border-color: rgba(8,145,178,0.2);
    --glass-border: rgba(255,255,255,0.72);
    --accent: #0891b2;
    --accent-hover: #0e7490;
    --accent-light: rgba(8,145,178,0.1);
    --accent2: #7c3aed;
    --danger: #e11d48;
    --success: #059669;
    --warning: #d97706;
    --shadow: 0 2px 12px rgba(8,47,73,0.08);
    --shadow-lg: 0 8px 30px rgba(8,47,73,0.12);
    --radius: 6px;
    --radius-sm: 3px;
    --font-display: "Bahnschrift", "Rajdhani", "Courier New", ui-monospace, monospace;
}

/* ---------- 系统 · 赛博穿越（暗，主打） ---------- */
[data-style="system"][data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #06080f 0%, #0a1220 50%, #06080f 100%);
    --bg-primary: #06080f;
    --bg-secondary: rgba(13,20,36,0.88);
    --bg-tertiary: rgba(20,32,56,0.65);
    --bg-hover: rgba(0,229,255,0.08);
    --text-primary: #e8f4ff;
    --text-secondary: #7c93b4;
    --text-muted: #4a5f7e;
    --border-color: rgba(0,229,255,0.22);
    --glass-border: rgba(0,229,255,0.16);
    --accent: #00e5ff;
    --accent-hover: #4deeff;
    --accent-light: rgba(0,229,255,0.12);
    --accent2: #b44cff;
    --danger: #ff2e63;
    --success: #00ffa3;
    --warning: #ffb020;
    --shadow: 0 2px 12px rgba(0,0,0,0.5);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.6);
}

/* ---------- 女友 · 晨间丝绸（亮） ---------- */
[data-style="girlfriend"] {
    --bg-gradient: linear-gradient(135deg, #fff8f5 0%, #fdf2f0 50%, #fbf6f0 100%);
    --bg-primary: #fff8f5;
    --bg-secondary: rgba(255,255,255,0.9);
    --bg-tertiary: rgba(255,243,240,0.72);
    --bg-hover: rgba(249,233,230,0.85);
    --text-primary: #3b2a33;
    --text-secondary: #8c7480;
    --text-muted: #c2adb6;
    --border-color: rgba(194,169,106,0.26);
    --glass-border: rgba(255,255,255,0.78);
    --accent: #c25e7a;
    --accent-hover: #a94e68;
    --accent-light: rgba(232,128,152,0.12);
    --accent2: #c9a96a;
    --danger: #e24b4a;
    --success: #4c9a7a;
    --warning: #d97706;
    --shadow: 0 2px 12px rgba(120,70,90,0.06);
    --shadow-lg: 0 8px 30px rgba(120,70,90,0.1);
    --radius: 20px;
    --radius-sm: 14px;
    --font-display: Georgia, "Times New Roman", "Songti SC", "STSong", "SimSun", serif;
}

/* ---------- 女友 · 夜色私语（暗，主打） ---------- */
[data-style="girlfriend"][data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #1f1018 0%, #261522 50%, #1a0e16 100%);
    --bg-primary: #1f1018;
    --bg-secondary: rgba(44,26,37,0.88);
    --bg-tertiary: rgba(58,34,48,0.62);
    --bg-hover: rgba(232,128,152,0.08);
    --text-primary: #f5e8ee;
    --text-secondary: #a98b99;
    --text-muted: #6e5765;
    --border-color: rgba(212,180,131,0.26);
    --glass-border: rgba(212,180,131,0.18);
    --accent: #e88098;
    --accent-hover: #f099ac;
    --accent-light: rgba(232,128,152,0.14);
    --accent2: #d4b483;
    --danger: #e24b4a;
    --success: #66c2a0;
    --warning: #e0b060;
    --shadow: 0 2px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
}

/* ---------- 办公 · 商务职业（亮，默认） ---------- */
[data-style="office"] {
    --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #eef2f7 100%);
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: rgba(241,245,249,0.85);
    --bg-hover: #f1f5f9;
    --text-primary: #1f2937;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --glass-border: #e2e8f0;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: rgba(37,99,235,0.08);
    --accent2: #0f766e;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #d97706;
    --shadow: 0 1px 2px rgba(15,23,42,0.06);
    --shadow-lg: 0 4px 12px rgba(15,23,42,0.1);
    --radius: 8px;
    --radius-sm: 6px;
    --blur: 0px;
}

/* ---------- 办公 · 商务职业（暗） ---------- */
[data-style="office"][data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #111c33 100%);
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: rgba(30,41,59,0.85);
    --bg-hover: #283548;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --glass-border: #334155;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-light: rgba(96,165,250,0.12);
    --accent2: #2dd4bf;
    --shadow: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.5);
}

/* ============ 背景光球按风格染色 ============ */
[data-style="system"] .bg-orb-1 { background: #7de8ff; }
[data-style="system"] .bg-orb-2 { background: #b44cff; }
[data-style="system"] .bg-orb-3 { background: #185fa5; }
[data-style="system"][data-theme="dark"] .bg-orb { opacity: 0.14; }

[data-style="girlfriend"] .bg-orb-1 { background: #e88098; }
[data-style="girlfriend"] .bg-orb-2 { background: #d4b483; }
[data-style="girlfriend"] .bg-orb-3 { background: #c25e7a; }
[data-style="girlfriend"] .bg-orb { opacity: 0.12; }

[data-style="office"] .bg-orb-1 { background: #93b8f5; }
[data-style="office"] .bg-orb-2 { background: #c7d2e8; }
[data-style="office"] .bg-orb-3 { background: #e2e8f0; }
[data-style="office"] .bg-orb { opacity: 0.06; }

/* ============ 系统 · 字体与终端质感 ============ */
[data-style="system"] .logo,
[data-style="system"] .title {
    font-family: var(--font-display);
    letter-spacing: 0.08em;
    font-weight: 600;
}
[data-style="system"] .wc-header-title {
    font-family: var(--font-display);
    letter-spacing: 0.05em;
}
[data-style="system"] .wc-msg-time,
[data-style="system"] .wc-date-sep {
    font-family: ui-monospace, "Courier New", monospace;
}
[data-style="system"] ::-webkit-scrollbar-thumb { background: rgba(0,229,255,0.35); }

/* ============ 系统 · 气泡（锐角 + 霓虹描边） ============ */
[data-style="system"] .wc-msg-ai .wc-msg-bubble {
    border: 1px solid var(--border-color);
    border-radius: 4px 4px 4px 1px;
    position: relative;
}
[data-style="system"] .wc-msg-ai .wc-msg-bubble::before {
    content: "";
    position: absolute;
    top: -1px; left: -1px;
    width: 8px; height: 8px;
    border-top: 2px solid var(--accent);
    border-left: 2px solid var(--accent);
}
[data-style="system"] .wc-msg-user .wc-msg-bubble {
    background: var(--accent);
    color: #04121a;
    border-radius: 4px 4px 1px 4px;
}
[data-style="system"]:not([data-theme="dark"]) .wc-msg-user .wc-msg-bubble {
    color: #ffffff;
}

/* ============ 女友 · 字体与丝绒质感 ============ */
[data-style="girlfriend"] .logo,
[data-style="girlfriend"] .title,
[data-style="girlfriend"] .wc-header-title {
    font-family: var(--font-display);
    letter-spacing: 0.02em;
}
[data-style="girlfriend"] .content-area h3 {
    font-family: var(--font-display);
    font-weight: 500;
}
[data-style="girlfriend"] .wc-msg-ai .wc-msg-bubble {
    border-radius: 20px 20px 20px 6px;
    box-shadow: 0 4px 24px rgba(232,128,152,0.16);
}
[data-style="girlfriend"] .wc-msg-user .wc-msg-bubble {
    border-radius: 20px 20px 6px 20px;
    border: 1px solid rgba(212,180,131,0.45);
    box-shadow: 0 3px 16px rgba(212,180,131,0.12);
}
[data-style="girlfriend"] .style-option.active {
    box-shadow: 0 4px 20px rgba(232,128,152,0.25);
}

/* ============ 办公 · 数字对齐与克制质感 ============ */
[data-style="office"] .wc-msg-time,
[data-style="office"] .wc-date-sep {
    font-variant-numeric: tabular-nums;
}
[data-style="office"] .wc-msg-ai .wc-msg-bubble {
    border-radius: 8px 8px 8px 2px;
    border: 1px solid var(--border-color);
}
[data-style="office"] .wc-msg-user .wc-msg-bubble {
    border-radius: 8px 8px 2px 8px;
}
[data-style="office"] .btn { transition-duration: 0.15s; }

/* ============ 焦点环（三风格各异） ============ */
[data-style="system"] :focus-visible,
[data-style="girlfriend"] :focus-visible,
[data-style="office"] :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
[data-style="office"] :focus-visible { outline-offset: 1px; }

/* ============ 移动端底部标签栏 ============ */
.mobile-tabbar {
    display: none;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 90;
    grid-template-columns: repeat(5, 1fr);
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border-top: 1px solid var(--border-color);
    padding: 3px 0 calc(3px + env(safe-area-inset-bottom));
}
.mobile-tabbar .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 46px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.mobile-tabbar .tab-item .tab-icon {
    font-size: 18px;
    line-height: 1;
}
.mobile-tabbar .tab-item.active {
    color: var(--accent);
    font-weight: 500;
}
@media (max-width: 768px) {
    .mobile-tabbar { display: grid; }
    .main-content { padding-bottom: calc(54px + env(safe-area-inset-bottom)); }
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
    body { animation: none; }
    .bg-orb { animation: none; }
    [data-style] * { transition-duration: 0.01ms !important; }
}