/* ============================================================
   AuraDraw2 · 全局样式（v3 现代风）
   设计语言：深色玻璃拟态基底 + 紫→青渐变高亮、大圆角、柔和光晕。
   字体：Noto Sans SC 由 index.html 的 Google Fonts <link> 加载
   （浏览器按 unicode-range 自动按需子集化），无需本地字体文件。
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
    --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-num: "Noto Sans SC", ui-monospace, "SF Mono", SFMono-Regular,
        Menlo, Consolas, "Liberation Mono", monospace;

    --r-sm: 10px;
    --r-md: 16px;
    --r-lg: 22px;
    --r-pill: 999px;
    --dur: 0.2s;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 主题变量 ---------- */
:root,
[data-theme="dark"] {
    --bg: #07070f;
    --bg-glow-1: rgba(139, 92, 246, 0.18);
    --bg-glow-2: rgba(34, 211, 238, 0.12);
    --surface: rgba(255, 255, 255, 0.045);
    --surface-2: rgba(255, 255, 255, 0.09);
    --surface-3: rgba(255, 255, 255, 0.14);
    --border: rgba(255, 255, 255, 0.10);
    --border-strong: rgba(255, 255, 255, 0.22);
    --text-1: #f1f2f8;
    --text-2: #a0a6bb;
    --text-3: #666d84;
    --accent-a: #a78bfa;
    --accent-b: #22d3ee;
    --grad: linear-gradient(135deg, #8b5cf6 0%, #6366f1 45%, #22d3ee 100%);
    --success: #34d399;
    --danger: #fb7185;
    --danger-bg: rgba(251, 113, 133, 0.12);
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-2: 0 8px 24px rgba(0, 0, 0, 0.35);
    --glow: 0 0 0 1px rgba(139, 92, 246, 0.25), 0 8px 32px rgba(139, 92, 246, 0.25);
    color-scheme: dark;
}

[data-theme="light"] {
    --bg: #f3f4fb;
    --bg-glow-1: rgba(139, 92, 246, 0.14);
    --bg-glow-2: rgba(34, 211, 238, 0.16);
    --surface: rgba(255, 255, 255, 0.75);
    --surface-2: rgba(255, 255, 255, 0.95);
    --surface-3: rgba(15, 20, 40, 0.08);
    --border: rgba(30, 35, 60, 0.10);
    --border-strong: rgba(30, 35, 60, 0.22);
    --text-1: #171a26;
    --text-2: #4c5267;
    --text-3: #8a90a6;
    --accent-a: #7c3aed;
    --accent-b: #0891b2;
    --grad: linear-gradient(135deg, #7c3aed 0%, #4f46e5 45%, #0891b2 100%);
    --success: #059669;
    --danger: #e11d48;
    --danger-bg: rgba(225, 29, 72, 0.08);
    --shadow-1: 0 1px 2px rgba(30, 35, 60, 0.08);
    --shadow-2: 0 8px 24px rgba(30, 35, 60, 0.12);
    --glow: 0 0 0 1px rgba(124, 58, 237, 0.18), 0 8px 32px rgba(124, 58, 237, 0.14);
    color-scheme: light;
}

/* ---------- 基础 ---------- */
* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100dvh;
    background:
        radial-gradient(1100px 560px at 85% -8%, var(--bg-glow-2), transparent 62%),
        radial-gradient(900px 520px at -12% 18%, var(--bg-glow-1), transparent 58%),
        var(--bg);
    background-attachment: fixed;
    color: var(--text-1);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

::selection {
    background: color-mix(in srgb, var(--accent-a) 35%, transparent);
}

button {
    font: inherit;
}

a {
    color: var(--accent-a);
}

:focus-visible {
    outline: 2px solid var(--accent-a);
    outline-offset: 2px;
}

@media (pointer: fine) {
    ::-webkit-scrollbar {
        width: 10px;
        height: 10px;
    }
    ::-webkit-scrollbar-thumb {
        background: var(--surface-3);
        border-radius: 5px;
        border: 2px solid transparent;
        background-clip: content-box;
    }
    ::-webkit-scrollbar-track {
        background: transparent;
    }
}

/* ---------- 应用外壳 ---------- */
.app {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

.page {
    flex: 1;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    padding: 104px 20px 48px;
}

.page-inner {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.page-head {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.page-title {
    margin: 0;
    font-size: 30px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.page-sub {
    margin: 0;
    font-size: 13px;
    color: var(--text-3);
}

/* ---------- 导航（悬浮玻璃胶囊） ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    padding: 14px 20px 0;
    pointer-events: none;
}

.nav-inner {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    background: var(--surface-2);
    background: color-mix(in srgb, var(--surface-2) 72%, transparent);
    border: 1px solid var(--border);
    border-radius: var(--r-pill);
    backdrop-filter: blur(14px) saturate(1.4);
    -webkit-backdrop-filter: blur(14px) saturate(1.4);
    box-shadow: var(--shadow-1);
    pointer-events: auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-1);
    padding: 6px 12px 6px 8px;
    border-radius: var(--r-pill);
    font-weight: 800;
    font-size: 16px;
    letter-spacing: 0.2px;
    transition: background var(--dur) var(--ease);
}

.nav-brand:hover {
    background: var(--surface);
}

.brand-mark {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: var(--grad);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 13px;
    font-weight: 900;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.4);
}

.nav-links {
    display: flex;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav-links button,
.nav-theme {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-2);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--r-pill);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-links button:hover,
.nav-theme:hover {
    color: var(--text-1);
    background: var(--surface);
}

.nav-links button.active {
    color: #fff;
    background: var(--grad);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.nav-theme {
    width: 38px;
    height: 38px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--border);
}

.nav .icon {
    width: 18px;
    height: 18px;
}

/* ---------- 卡片 ---------- */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 22px;
    box-shadow: var(--shadow-2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* ---------- 表单 ---------- */
.form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: 0.2px;
}

.input {
    font: inherit;
    font-size: 15px;
    font-weight: 500;
    width: 100%;
    color: var(--text-1);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 12px 14px;
    outline: none;
    font-variant-numeric: tabular-nums;
    transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.input::placeholder {
    color: var(--text-3);
}

.input:hover {
    border-color: var(--border-strong);
}

.input:focus {
    border-color: var(--accent-a);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-a) 22%, transparent);
}

.select-wrap {
    position: relative;
}

.select-wrap select.input {
    appearance: none;
    padding-right: 42px;
    cursor: pointer;
}

.select-wrap .chevron {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-3);
    pointer-events: none;
}

.form .row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.form-error {
    margin: 0;
    font-size: 13px;
    color: var(--danger);
    background: var(--danger-bg);
    border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
    border-radius: var(--r-sm);
    padding: 10px 12px;
    word-break: break-word;
    animation: rise 0.25s var(--ease) both;
}

/* ---------- 按钮 ---------- */
.btn {
    font: inherit;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--r-md);
    padding: 13px 24px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    user-select: none;
    transition: transform 0.12s var(--ease), box-shadow var(--dur) var(--ease),
        background var(--dur) var(--ease), border-color var(--dur) var(--ease),
        filter var(--dur) var(--ease);
}

.btn:active:not(:disabled) {
    transform: translateY(1px) scale(0.99);
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.btn-primary {
    color: #fff;
    background: var(--grad);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover:not(:disabled) {
    filter: brightness(1.08);
    box-shadow: 0 8px 26px rgba(99, 102, 241, 0.45);
}

.btn-ghost {
    color: var(--text-2);
    background: var(--surface);
    border: 1px solid var(--border);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-1);
    border-color: var(--border-strong);
    background: var(--surface-2);
}

.btn-sm {
    font-size: 12px;
    padding: 6px 12px;
    border-radius: var(--r-sm);
    font-weight: 600;
}

/* ---------- 加载动画 ---------- */
.spinner {
    width: 15px;
    height: 15px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ---------- 首页 ---------- */
.home {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hero {
    text-align: center;
    padding: 34px 8px 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--accent-a);
    border: 1px solid color-mix(in srgb, var(--accent-a) 35%, transparent);
    background: color-mix(in srgb, var(--accent-a) 10%, transparent);
    border-radius: var(--r-pill);
    padding: 6px 14px;
}

.hero .title {
    margin: 0;
    font-size: clamp(44px, 9vw, 64px);
    font-weight: 900;
    letter-spacing: 1px;
    line-height: 1.05;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 4px 24px rgba(139, 92, 246, 0.35));
}

.hero .subtitle {
    margin: 0;
    font-size: 15px;
    color: var(--text-2);
}

.intro h2 {
    margin: 0 0 10px;
    font-size: 17px;
    font-weight: 700;
}

.intro p {
    margin: 0 0 10px;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.8;
}

.intro p:last-child {
    margin-bottom: 0;
}

.entries {
    display: flex;
    gap: 16px;
}

.entry {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    text-decoration: none;
    color: var(--text-1);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 22px;
    overflow: hidden;
    transition: transform 0.18s var(--ease), border-color var(--dur) var(--ease),
        box-shadow var(--dur) var(--ease);
}

.entry::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--grad);
    opacity: 0;
    transition: opacity 0.25s var(--ease);
}

.entry:hover {
    transform: translateY(-3px);
    border-color: var(--border-strong);
    box-shadow: var(--glow);
}

.entry:hover::before {
    opacity: 0.06;
}

.entry-icon {
    width: 44px;
    height: 44px;
    border-radius: 13px;
    background: var(--grad);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.entry-icon .icon {
    width: 22px;
    height: 22px;
}

.entry-title {
    font-size: 19px;
    font-weight: 700;
}

.entry-desc {
    font-size: 13px;
    color: var(--text-3);
}

.entry-arrow {
    position: absolute;
    top: 20px;
    right: 20px;
    color: var(--text-3);
    transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

.entry-arrow .icon {
    width: 18px;
    height: 18px;
}

.entry:hover .entry-arrow {
    transform: translateX(3px);
    color: var(--accent-a);
}

.strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.strip-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.strip-item b {
    font-size: 13px;
    font-weight: 700;
}

.strip-item span {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.55;
}

.foot {
    text-align: center;
    font-size: 12px;
    color: var(--text-3);
    padding: 8px 0 4px;
}

/* ---------- 结果区 ---------- */
.results {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.results-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.results-count {
    margin: 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
}

.results-count b {
    color: var(--accent-a);
    font-variant-numeric: tabular-nums;
}

.empty-hint {
    text-align: center;
    font-size: 14px;
    color: var(--text-3);
    white-space: pre-line;
    padding: 34px 22px;
    border-style: dashed;
}

/* ---------- 结果卡片 ---------- */
.card.result {
    padding: 18px 20px;
    animation: rise 0.3s var(--ease) both;
}

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-size: 11px;
    color: var(--text-3);
}

.card-index {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-a);
    background: color-mix(in srgb, var(--accent-a) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent-a) 28%, transparent);
    border-radius: var(--r-pill);
    padding: 3px 10px;
}

.card-num {
    font-family: var(--font-num);
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 1px;
    margin: 14px 0 0;
    line-height: 1.2;
    word-break: break-all;
    font-variant-numeric: tabular-nums;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* 大乐透号码球 */
.balls {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 14px;
}

.ball-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.ball-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-3);
    margin-right: 4px;
    min-width: 2.2em;
}

.ball {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-num);
    font-size: 15px;
    font-weight: 800;
    color: #fff;
    box-shadow: inset 0 -3px 6px rgba(0, 0, 0, 0.22), 0 4px 10px rgba(0, 0, 0, 0.25);
}

.ball-front {
    background: linear-gradient(135deg, #8b5cf6, #3b82f6);
}

.ball-back {
    background: linear-gradient(135deg, #f97316, #ef4444);
}

/* 签名 */
.sig-full {
    margin-top: 12px;
    font-size: 11px;
    color: var(--text-3);
    word-break: break-all;
    white-space: pre-wrap;
    line-height: 1.7;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    padding: 10px 12px;
}

.card-foot {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    flex-wrap: wrap;
}

.card-foot .sig {
    flex: 1;
    min-width: 0;
    font-family: var(--font-num);
    font-size: 11px;
    color: var(--text-3);
    word-break: break-all;
}

/* ---------- 加载更多 ---------- */
.load-more {
    display: flex;
    justify-content: center;
    padding: 4px 0 12px;
}

/* ---------- 移动端 ---------- */
@media (max-width: 767px) {
    .nav {
        top: auto;
        bottom: 0;
        padding: 0 12px 12px;
    }

    .nav-inner {
        border-radius: var(--r-lg);
        padding: 6px;
        box-shadow: var(--shadow-2);
    }

    .nav-brand {
        padding: 6px 8px;
    }

    .nav-brand .brand-name {
        display: none;
    }

    .nav-links {
        justify-content: space-around;
        flex: 1;
    }

    .nav-links button {
        flex: 1;
        padding: 10px 6px;
        font-size: 13px;
    }

    .page {
        padding: 24px 14px 104px;
    }

    .hero {
        padding-top: 22px;
    }

    .entries {
        flex-direction: column;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .strip {
        grid-template-columns: 1fr;
    }

    .card-num {
        font-size: 28px;
    }

    .ball {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
}

/* ---------- 无障碍：减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}