/**
 * 全局基础样式：重置、玻璃面板、按钮、表单、Toast、导航、滚动条。
 * 页面级样式在各自的 index/login/download/settings.css 中扩展。
 */

@import url("/static/css/theme.css");

/* ============ 重置 ============ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    font-size: var(--fs-15);
    line-height: 1.5;
    background: var(--bg-void);
    color: var(--text-1);
    min-height: 100vh;
    min-height: 100dvh;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/**
 * 全局环境光：跟随封面主色，随音量呼吸、随低频扩张。
 * 只动 transform / opacity，不触发布局。
 */
body::before {
    content: "";
    position: fixed;
    inset: -25%;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(38% 34% at 22% 12%, var(--theme-glow), transparent 70%),
        radial-gradient(34% 30% at 82% 88%, hsl(var(--theme-h) 90% 62% / 0.28), transparent 72%),
        radial-gradient(46% 40% at 68% 26%, rgba(37, 244, 238, 0.10), transparent 75%);
    opacity: calc(0.35 + var(--level) * 0.45);
    transform: scale(calc(1 + var(--bass) * 0.08));
    filter: blur(30px);
    transition: opacity var(--dur-slow) linear;
    will-change: transform, opacity;
}

body.no-ambient::before {
    display: none;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: var(--title-tracking);
    line-height: 1.25;
}

::selection {
    background: var(--theme-soft);
    color: #fff;
}

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

/* ============ 工具类 ============ */
.hidden {
    display: none !important;
}

.tnum,
.time {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

.text-2 { color: var(--text-2); }
.text-3 { color: var(--text-3); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

.divider {
    height: 1px;
    background: var(--surface-line);
    border: 0;
}

/* ============ 玻璃面板 ============ */
.glass {
    position: relative;
    background: var(--surface-1);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-glass);
}

/* 渐变描边：用 mask 掏空内部，只留 1px 边 */
.glass::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(
        150deg,
        rgba(255, 255, 255, 0.24),
        rgba(255, 255, 255, 0.05) 38%,
        rgba(255, 255, 255, 0) 62%,
        var(--theme-soft)
    );
    -webkit-mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask:
        linear-gradient(#000 0 0) content-box,
        linear-gradient(#000 0 0);
    mask-composite: exclude;
    pointer-events: none;
}

.glass-2 {
    background: var(--surface-2);
}

/* 不支持 backdrop-filter 时退回不透明底，保证文字对比度 */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .glass,
    .navbar,
    .toast {
        background: rgba(20, 20, 28, 0.94);
    }
}

/* ============ 导航栏 ============ */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-12);
    height: calc(var(--nav-h) + var(--safe-top));
    padding: var(--safe-top) var(--sp-16) 0;
    background: rgba(7, 7, 11, 0.55);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    border-bottom: 1px solid var(--surface-line);
}

.navbar::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--theme-soft), transparent);
    opacity: calc(0.35 + var(--mid) * 0.65);
    pointer-events: none;
}

.navbar .logo {
    font-size: var(--fs-20);
    font-weight: 700;
    letter-spacing: var(--title-tracking);
    background: linear-gradient(112deg, var(--brand-hot), var(--brand-cool));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.navbar .nav-link {
    padding: var(--sp-8) var(--sp-16);
    border-radius: var(--r-pill);
    font-size: var(--fs-13);
    font-weight: 500;
    color: var(--text-2);
    border: 1px solid transparent;
    transition: background var(--dur-fast) ease, color var(--dur-fast) ease,
        border-color var(--dur-fast) ease;
}

.navbar .nav-link:hover {
    background: var(--surface-1);
    border-color: var(--surface-line);
    color: var(--text-1);
}

.navbar .nav-link.primary {
    background: linear-gradient(135deg, var(--brand-hot), #ff5c7c);
    color: #fff;
    border-color: transparent;
}

.navbar .nav-link.primary:hover {
    box-shadow: 0 6px 18px rgba(254, 44, 85, 0.35);
}

/* ============ 按钮 ============ */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-8);
    padding: 10px var(--sp-20);
    border: 1px solid transparent;
    border-radius: var(--r-pill);
    font-size: var(--fs-15);
    font-weight: 600;
    letter-spacing: 0.01em;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    background: transparent;
    transition: transform var(--dur-fast) var(--ease-out),
        box-shadow var(--dur-base) ease, background var(--dur-base) ease,
        opacity var(--dur-base) ease, border-color var(--dur-base) ease;
}

.btn:active:not(:disabled) {
    transform: scale(0.955);
}

.btn:disabled {
    opacity: 0.42;
    cursor: not-allowed;
    box-shadow: none;
}

.btn-sm {
    padding: 7px var(--sp-12);
    font-size: var(--fs-13);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-hot), #ff5c7c);
    color: #fff;
    box-shadow: 0 6px 20px rgba(254, 44, 85, 0.30);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 8px 28px rgba(254, 44, 85, 0.45);
}

.btn-secondary {
    background: var(--surface-1);
    border-color: var(--surface-line);
    color: var(--text-1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--surface-2);
}

.btn-accent {
    background: linear-gradient(135deg, var(--brand-cool), #7dfff9);
    color: #04262a;
    box-shadow: 0 6px 20px rgba(37, 244, 238, 0.26);
}

.btn-accent:hover:not(:disabled) {
    box-shadow: 0 8px 28px rgba(37, 244, 238, 0.42);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #ff7a86);
    color: #fff;
    box-shadow: 0 6px 20px rgba(255, 77, 94, 0.28);
}

.btn-danger:hover:not(:disabled) {
    box-shadow: 0 8px 28px rgba(255, 77, 94, 0.44);
}

.btn-ghost {
    color: var(--text-2);
}

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

/* 圆形图标按钮 */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--surface-line);
    border-radius: 50%;
    background: var(--surface-1);
    color: var(--text-1);
    cursor: pointer;
    transition: transform var(--dur-fast) var(--ease-out),
        background var(--dur-base) ease;
}

.icon-btn:hover {
    background: var(--surface-2);
}

.icon-btn:active {
    transform: scale(0.9);
}

/* ============ 表单 ============ */
.form-label {
    display: block;
    font-size: var(--fs-12);
    font-weight: 500;
    color: var(--text-2);
    margin-bottom: var(--sp-8);
}

.form-input,
.form-select,
textarea.form-input {
    width: 100%;
    padding: 11px var(--sp-16);
    border: 1px solid var(--surface-line);
    border-radius: var(--r-sm);
    background: var(--surface-1);
    color: var(--text-1);
    font-size: var(--fs-15);
    outline: none;
    transition: border-color var(--dur-base) ease, box-shadow var(--dur-base) ease,
        background var(--dur-base) ease;
}

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

.form-input:focus,
.form-select:focus,
textarea.form-input:focus {
    border-color: var(--theme);
    background: var(--surface-2);
    box-shadow: 0 0 0 3px var(--theme-soft);
}

.form-input:disabled,
.form-select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

textarea.form-input {
    resize: vertical;
    min-height: 96px;
    line-height: 1.55;
}

.form-select {
    appearance: none;
    -webkit-appearance: none;
    padding-right: 38px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239a9aa5' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--sp-12) center;
}

.form-select option {
    background: var(--bg-deep);
    color: var(--text-1);
}

.form-field + .form-field {
    margin-top: var(--sp-16);
}

/* ============ 加载指示 ============ */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--surface-line);
    border-top-color: var(--theme);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-lg {
    width: 34px;
    height: 34px;
    border-width: 3px;
}

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

/* ============ Toast ============ */
.toast-stack {
    position: fixed;
    left: 50%;
    bottom: calc(var(--sp-24) + var(--safe-bottom));
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
    gap: var(--sp-8);
    width: min(92vw, 420px);
    transform: translateX(-50%);
    pointer-events: none;
}

.toast {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--sp-12);
    max-width: 100%;
    padding: 12px var(--sp-16);
    border-radius: var(--r-md);
    overflow: hidden;
    background: rgba(18, 18, 26, 0.72);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
    border: 1px solid var(--surface-line);
    box-shadow: var(--shadow-glass);
    animation: toast-rise var(--dur-slow) var(--ease-out) both;
}

.toast.is-leaving {
    animation: toast-sink 220ms ease forwards;
}

.toast-icon {
    flex: 0 0 20px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-msg {
    flex: 1;
    font-size: var(--fs-13);
    line-height: 1.45;
    color: var(--text-1);
    word-break: break-word;
}

.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon { color: var(--danger); }
.toast.info .toast-icon { color: var(--brand-cool); }

.toast-progress {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    transform-origin: left center;
    background: linear-gradient(90deg, var(--brand-hot), var(--brand-cool));
    animation: toast-progress var(--toast-dur, 3000ms) linear forwards;
}

.toast.success .toast-progress {
    background: linear-gradient(90deg, var(--success), var(--brand-cool));
}

@keyframes toast-rise {
    from { opacity: 0; transform: translateY(18px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toast-sink {
    to { opacity: 0; transform: translateY(10px) scale(0.97); }
}

@keyframes toast-progress {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}

/* ============ 滚动条 ============ */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.16);
    border: 2px solid transparent;
    background-clip: padding-box;
    border-radius: var(--r-pill);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--theme-soft);
    background-clip: padding-box;
}

/* ============ 降级 ============ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 1ms !important;
        scroll-behavior: auto !important;
    }

    body::before {
        transform: none;
    }

    /* 进度条靠动画走完，降级后直接隐藏，避免停在满格 */
    .toast-progress {
        display: none;
    }
}