/* === 主题变量定义 === */
/* warm - 暖橙活力（默认/当前风格） */
:root, [data-theme="warm"] {
    --bg: #1a0f0a;
    --bg2: #2a1810;
    --bg3: #241410;
    --bg-input: #1a0f0a;
    --border: #3a2418;
    --border2: #4d3020;
    --text: #f5e6d3;
    --text2: #c0a890;
    --text3: #a08868;
    --text4: #806040;
    --text5: #705030;
    --accent: #ff6b35;
    --accent2: #f7c948;
    --accent3: #ff8c5a;
    --accent-grad: linear-gradient(135deg, #ff6b35 0%, #f7c948 100%);
    --accent-glow: rgba(255,107,53,0.4);
    --accent-glow2: rgba(255,107,53,0.1);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #ff6b35 0%, #f7c948 35%, #1a0f0a 75%);
    --shadow: rgba(0,0,0,0.3);
    --nav-bg: #241410;
    --footer-bg: #100805;
    --error: #ff4466;
    --error-border: #4d2020;
    --rank1: #ff4444;
    --rank2: #ff8800;
    --rank3: #aaa;
}

/* light - 清淡简约 */
[data-theme="light"] {
    --bg: #f5f7fa;
    --bg2: #ffffff;
    --bg3: #eef1f6;
    --bg-input: #ffffff;
    --border: #e0e5ed;
    --border2: #d0d7e0;
    --text: #2c3e50;
    --text2: #5a6b7e;
    --text3: #8090a0;
    --text4: #a0b0c0;
    --text5: #c0d0e0;
    --accent: #4a90d9;
    --accent2: #67b26f;
    --accent3: #5a9ee0;
    --accent-grad: linear-gradient(135deg, #4a90d9 0%, #67b26f 100%);
    --accent-glow: rgba(74,144,217,0.15);
    --accent-glow2: rgba(74,144,217,0.05);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #4a90d9 0%, #67b26f 30%, #f5f7fa 75%);
    --shadow: rgba(0,0,0,0.06);
    --nav-bg: #ffffff;
    --footer-bg: #e8ecf0;
    --error: #e74c3c;
    --error-border: #fadbd8;
    --rank1: #e74c3c;
    --rank2: #f39c12;
    --rank3: #bdc3c7;
}

/* cool - 清凉蓝绿 */
[data-theme="cool"] {
    --bg: #0d1b2a;
    --bg2: #16263a;
    --bg3: #1b2d42;
    --bg-input: #0d1b2a;
    --border: #2a3f5a;
    --border2: #3a526e;
    --text: #e0e8f0;
    --text2: #a0b0c0;
    --text3: #7a8a9a;
    --text4: #5a6a7a;
    --text5: #4a5a6a;
    --accent: #2ec4b6;
    --accent2: #36d399;
    --accent3: #5dd5c8;
    --accent-grad: linear-gradient(135deg, #2ec4b6 0%, #36d399 100%);
    --accent-glow: rgba(46,196,182,0.3);
    --accent-glow2: rgba(46,196,182,0.08);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #2ec4b6 0%, #36d399 30%, #0d1b2a 75%);
    --shadow: rgba(0,0,0,0.2);
    --nav-bg: #16263a;
    --footer-bg: #081421;
    --error: #ff6b6b;
    --error-border: #3a2020;
    --rank1: #ff6b6b;
    --rank2: #ffa94d;
    --rank3: #868e96;
}

/* ink - 水墨中国风 */
[data-theme="ink"] {
    --bg: #f8f6f2;
    --bg2: #ffffff;
    --bg3: #f0ede8;
    --bg-input: #ffffff;
    --border: #d8d3ca;
    --border2: #c8c2b8;
    --text: #333333;
    --text2: #666666;
    --text3: #888888;
    --text4: #aaaaaa;
    --text5: #cccccc;
    --accent: #8b4513;
    --accent2: #c17f59;
    --accent3: #a0522d;
    --accent-grad: linear-gradient(135deg, #8b4513 0%, #c17f59 100%);
    --accent-glow: rgba(139,69,19,0.12);
    --accent-glow2: rgba(139,69,19,0.04);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #c17f59 0%, #d4a76a 30%, #f8f6f2 75%);
    --shadow: rgba(0,0,0,0.04);
    --nav-bg: #ffffff;
    --footer-bg: #f0ede8;
    --error: #c0392b;
    --error-border: #f5d8d4;
    --rank1: #c0392b;
    --rank2: #d4a017;
    --rank3: #95a5a6;
}

/* light_rose - 浅色紫红调 */
[data-theme="light_rose"] {
    --bg: #faf5f7; --bg2: #ffffff; --bg3: #f3e8ec; --bg-input: #ffffff;
    --border: #e8d5dc; --border2: #d8c0c8;
    --text: #3d2030; --text2: #6a4a5e; --text3: #907080; --text4: #b090a0; --text5: #c8b0b8;
    --accent: #c0446a; --accent2: #e0719a; --accent3: #d05680;
    --accent-grad: linear-gradient(135deg, #c0446a 0%, #e0719a 100%);
    --accent-glow: rgba(192,68,106,0.12); --accent-glow2: rgba(192,68,106,0.04);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #c0446a 0%, #e0719a 30%, #faf5f7 75%);
    --shadow: rgba(0,0,0,0.05); --nav-bg: #ffffff; --footer-bg: #f0e0e6;
    --error: #d63031; --error-border: #fadbd8; --rank1: #d63031; --rank2: #e84393; --rank3: #bdc3c7;
}

/* light_red - 浅色红橙调 */
[data-theme="light_red"] {
    --bg: #faf6f5; --bg2: #ffffff; --bg3: #f3eae8; --bg-input: #ffffff;
    --border: #e8ddd8; --border2: #d8c8c0;
    --text: #3d2520; --text2: #6a4a40; --text3: #907060; --text4: #b09080; --text5: #c8b0a0;
    --accent: #d94a3d; --accent2: #f08c70; --accent3: #e36b58;
    --accent-grad: linear-gradient(135deg, #d94a3d 0%, #f08c70 100%);
    --accent-glow: rgba(217,74,61,0.12); --accent-glow2: rgba(217,74,61,0.04);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #d94a3d 0%, #f08c70 30%, #faf6f5 75%);
    --shadow: rgba(0,0,0,0.05); --nav-bg: #ffffff; --footer-bg: #f0e2dc;
    --error: #d63031; --error-border: #fadbd8; --rank1: #d63031; --rank2: #e17055; --rank3: #bdc3c7;
}

/* light_orange - 浅色橙黄调 */
[data-theme="light_orange"] {
    --bg: #faf7f3; --bg2: #ffffff; --bg3: #f3ece2; --bg-input: #ffffff;
    --border: #e8ddc8; --border2: #d8c8a8;
    --text: #3d3020; --text2: #6a5a3a; --text3: #90805a; --text4: #b0a07a; --text5: #c8b898;
    --accent: #e89520; --accent2: #f5b94e; --accent3: #eda638;
    --accent-grad: linear-gradient(135deg, #e89520 0%, #f5b94e 100%);
    --accent-glow: rgba(232,149,32,0.12); --accent-glow2: rgba(232,149,32,0.04);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #e89520 0%, #f5b94e 30%, #faf7f3 75%);
    --shadow: rgba(0,0,0,0.05); --nav-bg: #ffffff; --footer-bg: #f0e8d8;
    --error: #d63031; --error-border: #fadbd8; --rank1: #d63031; --rank2: #e89520; --rank3: #bdc3c7;
}

/* light_lime - 浅色绿黄调 */
[data-theme="light_lime"] {
    --bg: #f7faf5; --bg2: #ffffff; --bg3: #ecf3e8; --bg-input: #ffffff;
    --border: #d8e8d0; --border2: #c0d8b8;
    --text: #253d20; --text2: #4a6a3a; --text3: #60805a; --text4: #80a07a; --text5: #98b890;
    --accent: #7ab318; --accent2: #a5d24a; --accent3: #8fc52e;
    --accent-grad: linear-gradient(135deg, #7ab318 0%, #a5d24a 100%);
    --accent-glow: rgba(122,179,24,0.12); --accent-glow2: rgba(122,179,24,0.04);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #7ab318 0%, #a5d24a 30%, #f7faf5 75%);
    --shadow: rgba(0,0,0,0.05); --nav-bg: #ffffff; --footer-bg: #e0f0d8;
    --error: #d63031; --error-border: #fadbd8; --rank1: #d63031; --rank2: #7ab318; --rank3: #bdc3c7;
}

/* light_violet - 浅色紫黄调 */
[data-theme="light_violet"] {
    --bg: #f6f5fa; --bg2: #ffffff; --bg3: #ece8f3; --bg-input: #ffffff;
    --border: #ddd8e8; --border2: #c8c0d8;
    --text: #2a203d; --text2: #4a3a6a; --text3: #6a5a8a; --text4: #8a7aa8; --text5: #a898c0;
    --accent: #8b5cf6; --accent2: #fbbf24; --accent3: #a67af8;
    --accent-grad: linear-gradient(135deg, #8b5cf6 0%, #fbbf24 100%);
    --accent-glow: rgba(139,92,246,0.12); --accent-glow2: rgba(139,92,246,0.04);
    --hero-bg: radial-gradient(ellipse at 50% 0%, #8b5cf6 0%, #fbbf24 30%, #f6f5fa 75%);
    --shadow: rgba(0,0,0,0.05); --nav-bg: #ffffff; --footer-bg: #e8e0f0;
    --error: #d63031; --error-border: #fadbd8; --rank1: #d63031; --rank2: #8b5cf6; --rank3: #bdc3c7;
}