@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&family=DM+Mono:wght@400;500&family=Noto+Sans+SC:wght@400;600&display=swap');
@import url(https://fonts.googleapis.com/css?family=Righteous);

:root {
    color-scheme: dark;
    --bg-0: #0c111a;
    --bg-1: #111827;
    --bg-2: #1f2937;
    --panel: rgba(14, 19, 28, 0.72);
    --panel-border: rgba(255, 255, 255, 0.08);
    --text-0: #eef2f6;
    --text-1: rgba(238, 242, 246, 0.72);
    --text-2: rgba(238, 242, 246, 0.5);
    --text-3: #4b5563;
    --accent-x: #3fb8f4;
    --accent-xhat: #ffb347;
    --accent-x0: #4ade80;
    --accent-x1: #f472b6;
    --accent-xminus: #22c55e;
    --accent-r: #f59e0b;
    --accent-arc: #ffd166;
    --accent-mask: #38bdf8;
    --accent-wrap: #ff5d8f;
    --accent-ring: rgba(255, 255, 255, 0.4);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.2);
    --btn-bg: rgba(255, 255, 255, 0.08);
    --control-bg: rgba(255, 255, 255, 0.04);
    --control-border: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    background:
        radial-gradient(at 50% 0, transparent, #080808),
        repeating-conic-gradient(
            hsla(0, 0%, 0%, .235) 0% 25%,
            transparent 0% 50%
        ) 0 0 / 0.375em 0.375em,
        #3b3b3b;
    min-height: 100vh;
    padding: 24px;
    color: var(--text-0);
    display: flex;
    flex-direction: column;
    align-items: center;
}

#background-wrapper {
    display: none;
}

.page-container {
    width: 100%;
    max-width: 1280px;
    position: relative;
    z-index: 1;
    flex: 1;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 1.5rem;
    color: var(--text-1);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.25s ease;
}

.back-btn:hover {
    color: var(--text-0);
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    display: grid;
    gap: 0.4rem;
    justify-items: center;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.75rem;
    color: var(--text-2);
}

.header h1 {
    display: inline-block;
    color: hsl(0 0% 90%);
    font-family: 'Righteous', 'Microsoft YaHei', serif;
    font-size: 3.5em;
    text-shadow: .03em .03em 0 hsla(230,40%,50%,1);
    position: relative;
    line-height: 1.2;
    margin-bottom: 0.4rem;
}

.header h1::after {
    content: attr(data-shadow);
    position: absolute;
    top: .06em;
    left: .06em;
    width: 100%;
    height: 100%;
    z-index: -1;
    text-shadow: none;
    background-image: linear-gradient(
        45deg,
        transparent 45%,
        hsla(48,20%,90%,1) 45%,
        hsla(48,20%,90%,1) 55%,
        transparent 0
    );
    background-size: .05em .05em;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    white-space: nowrap;
    animation: shad-anim 60s linear infinite;
}

.subtitle {
    color: hsl(0 0% 75%);
    font-size: 1rem;
    max-width: 640px;
}

@keyframes shad-anim {
    0% { background-position: 0 0; }
    100% { background-position: 100% -100%; }
}

.ring-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 24px;
    align-items: start;
}

.ring-stack {
    display: grid;
    gap: 24px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 24px;
    backdrop-filter: blur(20px);
    animation: floatIn 0.6s ease both;
}

.panel:nth-child(2) {
    animation-delay: 0.08s;
}

.panel-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.panel-head h2 {
    font-size: 1.3rem;
    font-weight: 600;
}

.panel-sub {
    color: var(--text-2);
    font-size: 0.9rem;
    margin-top: 4px;
}

.control-inline {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-1);
    font-size: 0.9rem;
}

.toggle-inline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--text-1);
}

.toggle-inline input {
    accent-color: var(--accent-mask);
}

.power-input {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 10px;
    background: var(--control-bg);
    border: 1px solid var(--control-border);
}

.power-input.is-visible {
    display: inline-flex;
}

.power-value {
    font-size: 0.9rem;
    color: var(--text-1);
}

.input-field {
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-0);
    font-size: 0.95rem;
    min-width: 80px;
}

.input-field option {
    background: #1f2937;
    color: #f9fafb;
}

.ring-canvas {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

#ringSvg {
    width: min(520px, 100%);
    height: auto;
    overflow: visible;
}

.ring-base {
    fill: none;
    stroke: var(--accent-ring);
    stroke-width: 10;
}

.ring-hit {
    fill: none;
    stroke: transparent;
    stroke-width: 48;
    cursor: pointer;
}

.tick-line {
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 2;
}

.tick-line.major {
    stroke: rgba(255, 255, 255, 0.6);
    stroke-width: 3;
}

.tick-label {
    fill: var(--text-1);
    font-size: 10px;
    text-anchor: middle;
    dominant-baseline: middle;
}

.ring-arc {
    fill: none;
    stroke-linecap: round;
    stroke-width: 14;
}


.arc-target {
    stroke: var(--accent-arc);
}

.arc-offset {
    stroke: var(--accent-mask);
    stroke-dasharray: 6 10;
}

.arc-mask {
    stroke: var(--accent-mask);
    stroke-dasharray: 6 10;
}

.arc-rotate {
    stroke: rgba(255, 255, 255, 0.5);
    stroke-width: 8;
    stroke-dasharray: 3 8;
}

.arc-wrap {
    filter: drop-shadow(0 0 8px currentColor);
    animation: pulse 1.4s ease infinite;
}

.ring-arrow {
    stroke-width: 4;
    stroke-linecap: round;
    opacity: 0.9;
}

.arrow-x {
    color: var(--accent-x);
    stroke: var(--accent-x);
}

.arrow-xhat {
    color: var(--accent-xhat);
    stroke: var(--accent-xhat);
    stroke-dasharray: 4 6;
}

.arrow-x0 {
    color: var(--accent-x0);
    stroke: var(--accent-x0);
}

.arrow-x1 {
    color: var(--accent-x1);
    stroke: var(--accent-x1);
}

.ring-point {
    stroke: rgba(0, 0, 0, 0.5);
    stroke-width: 2;
}

.point-x {
    fill: var(--accent-x);
}

.point-xhat {
    fill: var(--accent-xhat);
}

.point-zero {
    fill: #ffffff;
    stroke: #000000;
}

.wrap-active .point-zero {
    fill: var(--accent-wrap);
    stroke: #ffffff;
    animation: pulse 1.4s ease infinite;
}

.ring-readout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
    width: 100%;
}

.readout-card {
    background: var(--input-bg);
    border: 1px solid var(--control-border);
    border-radius: 12px;
    padding: 10px 12px;
    display: grid;
    gap: 6px;
}

.readout-label {
    font-size: 0.85rem;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.readout-value {
    font-size: 1.2rem;
    font-weight: 600;
}

.mono {
    font-family: 'DM Mono', 'SFMono-Regular', monospace;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
    justify-content: center;
    color: var(--text-1);
    font-size: 0.85rem;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.legend-item.is-muted {
    opacity: 0.45;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.legend-swatch {
    display: inline-flex;
    align-items: center;
}

.legend-arc-line {
    width: 15px;
    height: 6px;
    border-radius: 999px;
    background: var(--accent-arc);
}

.dot-point {
    background: conic-gradient(#3fb8f4, #f59e0b, #22c55e, #f472b6, #38bdf8, #a855f7);
}

.dot-x { background: var(--accent-x); }
.dot-xhat { background: var(--accent-xhat); }
.dot-x0 { background: var(--accent-x0); }
.dot-x1 { background: var(--accent-x1); }
.dot-xminus { background: var(--accent-xminus); }
.dot-r { background: var(--accent-r); }
.dot-arc { background: var(--accent-arc); }
.dot-mask { background: var(--accent-mask); }

.control-panel {
    display: grid;
    gap: 16px;
}

.control-block {
    background: var(--control-bg);
    border: 1px solid var(--control-border);
    border-radius: 14px;
    padding: 16px;
    display: grid;
    gap: 12px;
}

.control-block h3 {
    font-size: 1.05rem;
}

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

.control-row label {
    font-size: 0.85rem;
    color: var(--text-2);
    min-width: 52px;
}

.dynamic-list {
    display: grid;
    gap: 10px;
}

.dynamic-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.offset-multi {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 10px;
    align-items: center;
}

.offset-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-1);
}

.offset-item input {
    accent-color: var(--accent-mask);
}

.offset-empty {
    color: var(--text-2);
    font-size: 0.8rem;
}

.dynamic-row .name-input {
    min-width: 120px;
}

.number-input {
    width: 70px;
    padding: 6px 8px;
    border-radius: 8px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-0);
    font-size: 0.9rem;
}


input[type="range"] {
    flex: 1 1 180px;
    min-width: 160px;
    accent-color: var(--accent-mask);
}

.formula {
    color: var(--text-2);
    font-size: 0.85rem;
}

.btn {
    -webkit-tap-highlight-color: transparent;
    cursor: pointer;
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 0.9rem;
    background: var(--btn-bg);
    border: 1px solid var(--input-border);
    color: var(--text-0);
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.12);
}

.btn-secondary {
    background: var(--control-bg);
}

.btn-compact {
    padding: 8px 12px;
    font-size: 0.8rem;
}

.wrap-card {
    border: 1px solid rgba(255, 93, 143, 0.35);
    background: rgba(255, 93, 143, 0.08);
}

.wrap-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.05rem;
}

.interval-row {
    display: flex;
    align-items: center;
    font-size: 1rem;
}

.wrap-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-wrap);
}

.hint {
    color: var(--text-2);
    font-size: 0.85rem;
}

.wrap-active .wrap-value {
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 93, 143, 0.8);
}

@keyframes floatIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: none; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@media (max-width: 1100px) {
    .ring-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    body {
        padding: 16px;
    }

    .header h1 {
        font-size: 2.4rem;
    }

    .control-row button {
        width: 100%;
        justify-content: center;
    }
}

body.day-mode {
    --text-0: #1f2937;
    --text-1: #4a5568;
    --text-2: #4b5563;
    --text-3: var(--text-2);
    --panel: rgba(255, 255, 255, 0.9);
    --panel-border: rgba(15, 23, 42, 0.08);
    --shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: rgba(15, 23, 42, 0.2);
    --btn-bg: rgba(15, 23, 42, 0.06);
    --control-bg: rgba(15, 23, 42, 0.04);
    --control-border: rgba(15, 23, 42, 0.08);
    --accent-ring: rgba(15, 23, 42, 0.35);
    --accent-mask: #2563eb;

    color-scheme: light;
    background: #f0f4f8;
    background-image: url(../../../../assets/image/day-background.png);
    background-size: auto;
    background-repeat: repeat;
    color: var(--text-0);
}

body.day-mode .back-btn {
    color: var(--text-1);
}

body.day-mode .back-btn:hover {
    color: #1a202c;
}

body.day-mode .header h1 {
    color: #2d3748;
    text-shadow: .03em .03em 0 hsla(200, 60%, 60%, 1);
}

body.day-mode .subtitle {
    color: var(--text-1);
}

body.day-mode .tick-line {
    stroke: rgba(15, 23, 42, 0.3);
}

body.day-mode .tick-label {
    fill: rgba(15, 23, 42, 0.7);
}

body.day-mode #arrowHead path {
    fill: context-stroke;
}

body.day-mode .readout-label {
    opacity: 0.75;
}

body.day-mode input[type="range"],
body.day-mode .toggle-inline input,
body.day-mode .offset-item input {
    accent-color: var(--accent-mask);
}

body.day-mode .power-input {
    background: var(--control-bg);
    border-color: var(--control-border);
}

body.day-mode .power-value,
body.day-mode .wrap-row .mono,
body.day-mode .toggle-inline,
body.day-mode .offset-item,
body.day-mode .control-inline label,
body.day-mode .control-row label {
    color: var(--text-0);
}

body.day-mode .wrap-card {
    background: rgba(255, 93, 143, 0.06);
}

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  user-select: none;
  transform: scale(0.64);
  transform-origin: top right;
}

.theme-toggle__checkbox {
  display: none;
}

.theme-toggle__btn {
  display: block;
  position: relative;
  width: 125px;
  height: 70px;
  border-radius: 70px;
  border: 5px solid #1c1c1c;
  background-color: #3c4145;
  cursor: pointer;
  transition: all 350ms ease-in;
}

.theme-toggle__btn::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background-color: #fff;
  border: 5px solid #e3e3c7;
  transition: all 250ms ease-in;
}

.theme-toggle__btn::after {
  content: '';
  position: absolute;
  top: 62%;
  left: 39px;
  z-index: 10;
  width: 9.2px;
  height: 9.2px;
  opacity: 0;
  background-color: #fff;
  border-radius: 50%;
  box-shadow:
    #fff 0 0,
    #fff 2.5px 0,
    #fff 5px 0,
    #fff 7.5px 0,
    #fff 9px 0,
    #fff 11.5px 0,
    #fff 13px 0,
    #fff 17px -1px 0 1px,
    #fff 13px -6px 0 -2px,
    #fff 6px -6px 0 1px,
    #d3d3d3 0 0 0 3.5px,
    #d3d3d3 5px 0 0 3.5px,
    #d3d3d3 9px 0 0 3.5px,
    #d3d3d3 13px 0 0 3.5px,
    #d3d3d3 17px -1px 0 4.5px,
    #d3d3d3 13px -6px 0 1px,
    #d3d3d3 6px -6px 0 4.5px;
  transition: opacity 100ms ease-in;
}

.theme-toggle__feature {
  display: block;
  position: absolute;
  top: 9px;
  left: 52.5%;
  z-index: 20;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #fff;
  box-shadow:
    rgba(255,255,255,0.1) 30px -3px 0 0,
    rgba(255,255,255,0.1) 12px 10px 0 -1px,
    #fff 38px 18px 0 1px,
    rgba(255,255,255,0.1) 32px 34px 0 0,
    #fff 20px 24px 0 -1.5px,
    rgba(255,255,255,0.1) 5px 38px 0 1px;
  animation: starry_star 5s ease-in-out infinite;
}

.theme-toggle__feature::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -25px;
  width: 15px;
  height: 15px;
  background-color: #fff;
  border-radius: 50%;
  border: 4px solid #e3e3c7;
  box-shadow:
    #e3e3c7 -28px 0 0 -3px,
    #e3e3c7 -8px 24px 0 -2px;
  transform-origin: -6px 130%;
  transition: all 250ms ease-in;
}

@keyframes starry_star {
  50% {
    background-color: rgba(255,255,255,0.1);
    box-shadow:
      #fff 30px -3px 0 0,
      #fff 12px 10px 0 -1px,
      rgba(255,255,255,0.1) 38px 18px 0 1px,
      #fff 32px 34px 0 0,
      rgba(255,255,255,0.1) 20px 24px 0 -1.5px,
      #fff 5px 38px 0 1px;
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.1);
  }
  55% {
    transform: scale(1.1);
  }
  75% {
    transform: scale(.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.theme-toggle__checkbox:checked + .theme-toggle__btn {
  background-color: #9ee3fb;
  border: 5px solid #86c3d7;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn::before {
  left: 57px;
  background-color: #ffdf6d;
  border: 5px solid #e1c348;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn::after {
  opacity: 1;
  animation-name: bounceIn;
  animation-duration: 0.60s;
  animation-delay: 0.10s;
  animation-fill-mode: backwards;
  animation-timing-function: ease-in-out;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn .theme-toggle__feature {
  opacity: 0;
  box-shadow:
    rgba(255,255,255,0.1) 30px -3px 0 -4px,
    rgba(255,255,255,0.1) 12px 10px 0 -5px,
    #fff 38px 18px 0 -3px,
    rgba(255,255,255,0.1) 32px 34px 0 -4px,
    #fff 20px 24px 0 -5.5px,
    rgba(255,255,255,0.1) 5px 38px 0 -3px;
  animation: none;
}

.theme-toggle__checkbox:checked + .theme-toggle__btn .theme-toggle__feature::before {
  left: 25px;
  transform: rotate(70deg);
}

@media (max-width: 768px) {
  .theme-toggle {
    top: 10px;
    right: 10px;
    transform: scale(0.58);
  }
}

/* ===== 页脚样式 ===== */
.footer {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 2rem 1rem;
  text-align: center;
  margin-top: auto;
}

.footer p {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  transition: color 300ms ease-out;
}

/* 日间模式页脚样式 */
body.day-mode .footer p {
  color: rgba(0, 0, 0, 0.5);
}

/* 页脚响应式 */
@media (max-width: 768px) {
  .footer {
    padding: 1.5rem 1rem;
  }

  .footer p {
    font-size: 0.75rem;
  }
}