:root {
    --bg-ink-a: #0a0c10;
    --bg-ink-b: #0d1117;
    --text: #eae6da;
    --muted: #b9b2a3;
    --ember: #e6b980;
    --ember-strong: #ffcd85;
    --ember-soft: rgba(230, 185, 128, .16);
    --glass: rgba(255, 255, 255, .04);
    --border: rgba(255, 240, 210, .12);
    --shadow: 0 30px 90px rgba(0, 0, 0, .55);
    --radius-lg: 22px;
    --radius-md: 14px;
    --font-main: "PingFang SC", "Noto Sans SC", "Helvetica Neue", sans-serif;
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    color: var(--text);
    font-family: var(--font-main);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
    background: linear-gradient(180deg, var(--bg-ink-a) 0%, var(--bg-ink-b) 60%, #090c12 100%);
    min-height: 100vh;
}

/* Background Effects */
body::before {
    content: "";
    position: fixed;
    inset: -8%;
    pointer-events: none;
    background:
        radial-gradient(1200px 600px at 15% 10%, rgba(255, 210, 140, .18), transparent 65%),
        radial-gradient(1000px 500px at 85% 15%, rgba(255, 180, 110, .14), transparent 68%),
        radial-gradient(1400px 700px at 50% 120%, rgba(0, 0, 0, .45), transparent 75%);
    mix-blend-mode: screen;
    opacity: .85;
    filter: saturate(1.05) brightness(.94);
    animation: nebulaFlow 25s ease-in-out infinite alternate;
    will-change: transform, opacity;
    transform: translateZ(0);
    z-index: -2;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        radial-gradient(1px 1px at 20% 25%, rgba(255, 230, 190, .9) 0, transparent 2px),
        radial-gradient(1px 1px at 60% 45%, rgba(255, 230, 190, .8) 0, transparent 2px),
        radial-gradient(1px 1px at 80% 70%, rgba(255, 230, 190, .95) 0, transparent 2px),
        radial-gradient(1px 1px at 40% 85%, rgba(255, 220, 170, .7) 0, transparent 2px);
    background-size: 1800px 1800px, 2000px 2000px, 2200px 2200px, 1600px 1600px;
    mix-blend-mode: screen;
    opacity: .75;
    animation: starDrift 20s linear infinite, twinkle 8s ease-in-out infinite alternate;
    will-change: background-position, opacity;
    transform: translateZ(0);
    z-index: -1;
}

@keyframes nebulaFlow {
    0% {
        transform: translate3d(-2%, -1%, 0) scale(1.02);
        opacity: .8;
    }

    50% {
        transform: translate3d(1%, 2%, 0) scale(1.05);
        opacity: .9;
    }

    100% {
        transform: translate3d(-1%, -0.5%, 0) scale(1.03);
        opacity: .85;
    }
}

@keyframes starDrift {
    0% {
        background-position: 0px 0px, 0px 0px, 0px 0px, 0px 0px;
    }

    100% {
        background-position: -900px 900px, -1000px 1000px, -1100px 1100px, -800px 800px;
    }
}

@keyframes twinkle {
    0% {
        opacity: .65
    }

    100% {
        opacity: .95
    }
}

/* Common Components */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 16px;
    position: relative;
    z-index: 1;
}

.glass-card {
    background: var(--glass);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
}

.btn {
    border: none;
    cursor: pointer;
    background: linear-gradient(180deg, #e6b980, #ffc56e);
    color: #3b2c11;
    font-weight: 800;
    padding: 12px 16px;
    border-radius: 12px;
    box-shadow: 0 10px 26px rgba(255, 205, 140, .28);
    transition: filter .18s ease, transform .02s;
    width: 100%;
    font-size: 16px;
}

.btn:hover {
    filter: brightness(1.05);
}

.btn:active {
    transform: translateY(1px);
}

.btn-ghost {
    background: transparent;
    color: #e9dfcc;
    border: 1px solid var(--border);
    box-shadow: none;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
    border: 1px solid var(--border);
}

input,
textarea {
    background: rgba(255, 255, 255, .03);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    outline: none;
    width: 100%;
    font-family: inherit;
    font-size: 16px;
    margin-bottom: 1rem;
}

input:focus,
textarea:focus {
    border-color: rgba(255, 215, 160, .55);
    box-shadow: 0 0 0 3px rgba(255, 205, 140, .18);
}

/* Typography */
h1,
h2,
h3 {
    color: #fff7ea;
    margin-top: 0;
}

.text-muted {
    color: var(--muted);
}

/* Skeleton */
.skeleton {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.6;
    }

    50% {
        opacity: 1;
    }

    100% {
        opacity: 0.6;
    }
}