/* ============================================================
   LUMEN · 暗色影院风
   ============================================================ */

:root {
  --bg:        #0a0a0c;
  --bg-soft:   #101013;
  --surface:   rgba(255,255,255,.024);
  --surface-2: rgba(255,255,255,.045);
  --line:      rgba(255,255,255,.075);
  --line-2:    rgba(255,255,255,.14);
  --line-3:    rgba(255,255,255,.26);
  --text:      #f0f0f3;
  --muted:     #8e8e99;
  --dim:       #57575f;
  --accent:    #c8a86b;
  --danger:    #d9705f;
  --radius:    14px;
  --radius-sm: 9px;
  --ease:      cubic-bezier(.22,.61,.36,1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 胶片颗粒 + 暗角，营造影院质感 */
.grain {
  position: fixed; inset: -50%;
  pointer-events: none; z-index: 0;
  opacity: .16;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 6s steps(6) infinite;
}
@keyframes grain {
  0%,100% { transform: translate(0,0) }
  20% { transform: translate(-3%, 2%) }
  40% { transform: translate(2%, -3%) }
  60% { transform: translate(-2%, -2%) }
  80% { transform: translate(3%, 1%) }
}
@media (prefers-reduced-motion: reduce) { .grain { animation: none } }

.vignette {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(1100px 620px at 50% -8%, rgba(200,168,107,.055), transparent 62%),
    radial-gradient(900px 700px at 50% 108%, rgba(120,130,190,.035), transparent 60%);
}

/* ---------------------------------------------------------- 顶栏 */

.topbar {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 34px;
  max-width: 1180px; margin: 0 auto;
}

.brand {
  display: inline-flex; align-items: center; gap: 11px;
  text-decoration: none; color: var(--text);
}
.brand-mark {
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px rgba(200,168,107,.35), 0 0 22px rgba(200,168,107,.45);
}
.brand-name {
  font-size: 14px; font-weight: 500;
  letter-spacing: .22em; text-indent: .22em;
}

.conn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--dim);
  letter-spacing: .04em;
  transition: color .2s var(--ease);
}
.conn-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--dim);
  transition: background .25s var(--ease), box-shadow .25s var(--ease);
}
.conn[data-ok="1"] { color: var(--muted) }
.conn[data-ok="1"] .conn-dot { background: #6bbf8a; box-shadow: 0 0 10px rgba(107,191,138,.6) }
.conn[data-ok="0"] { color: var(--danger) }
.conn[data-ok="0"] .conn-dot { background: var(--danger); box-shadow: 0 0 10px rgba(217,112,95,.55) }

.topbar-right { display: inline-flex; align-items: center; gap: 16px }

.logout {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--dim);
  font: inherit; font-size: 11.5px; letter-spacing: .08em;
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.logout svg { width: 13px; height: 13px }
.logout:hover {
  color: var(--text);
  border-color: var(--line-3);
  background: rgba(255,255,255,.04);
}

/* ---------------------------------------------------------- 主区 */

.stage {
  position: relative; z-index: 1;
  max-width: 1180px; margin: 0 auto;
  padding: 0 34px 90px;
}

/* ---------------------------------------------------------- Hero */

.hero {
  text-align: center;
  padding: 62px 0 46px;
  transition: opacity .5s var(--ease), transform .5s var(--ease), max-height .5s var(--ease);
  max-height: 420px;
}
body[data-state="working"] .hero,
body[data-state="done"] .hero {
  opacity: 0; transform: translateY(-14px);
  max-height: 0; padding: 0; pointer-events: none; overflow: hidden;
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(30px, 4.6vw, 54px);
  font-weight: 500;
  letter-spacing: -.022em;
  line-height: 1.14;
  background: linear-gradient(180deg, #ffffff 12%, #a9a9b4 118%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  margin: 0; color: var(--muted);
  font-size: 14.5px; letter-spacing: .01em;
}

/* ---------------------------------------------------------- 输入卡 */

.composer {
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.012));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 8px;
  backdrop-filter: blur(18px);
  box-shadow: 0 30px 70px -40px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.045);
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.composer:focus-within {
  border-color: rgba(200,168,107,.28);
  box-shadow: 0 30px 70px -40px rgba(0,0,0,.95), 0 0 0 4px rgba(200,168,107,.055);
}

.composer-body {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 8px;
}

.col {
  background: rgba(0,0,0,.28);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex; flex-direction: column;
  min-height: 216px;
}

.col-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; min-height: 18px;
}

.label {
  font-size: 11px; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--dim);
}

.counter { font-size: 11px; color: var(--dim); font-variant-numeric: tabular-nums; }

textarea {
  flex: 1; width: 100%;
  background: transparent; border: 0; outline: 0; resize: none;
  color: var(--text); font-family: var(--font);
  font-size: 15px; line-height: 1.72;
  letter-spacing: .004em;
}
textarea::placeholder { color: #4a4a52; }

/* 参考图投放区 */
.drop {
  flex: 1; position: relative; overflow: hidden;
  border: 1px dashed var(--line-2);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color .22s var(--ease), background .22s var(--ease);
  background: rgba(255,255,255,.012);
}
.drop:hover, .drop:focus-visible {
  border-color: rgba(200,168,107,.45);
  background: rgba(200,168,107,.035);
  outline: none;
}
.drop[data-over="1"] {
  border-color: var(--accent);
  background: rgba(200,168,107,.075);
}
.drop[data-filled="1"] { border-style: solid; border-color: var(--line-2) }

.drop-empty {
  display: flex; flex-direction: column; align-items: center; gap: 9px;
  color: var(--dim); pointer-events: none;
}
.drop-icon { width: 22px; height: 22px; color: var(--dim) }
.drop-title { font-size: 12.5px; color: var(--muted) }
.drop-hint { font-size: 11px; color: var(--dim); letter-spacing: .06em }

.drop-preview {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
}

/* 多参考图：缩略图列表 */
.drop[data-filled="1"] { padding: 0; overflow: hidden }
.ref-list {
  position: absolute; inset: 0;
  display: flex; gap: 5px;
  padding: 0;
}
.ref-item {
  position: relative; flex: 1 1 0; min-width: 0;
  overflow: hidden; background: #08080a;
  animation: refIn .26s var(--ease);
}
@keyframes refIn { from { opacity: 0; transform: scale(1.03) } to { opacity: 1; transform: none } }
.ref-item img { width: 100%; height: 100%; object-fit: cover; display: block }
.ref-badge {
  position: absolute; left: 6px; top: 6px;
  font-size: 10px; letter-spacing: .1em; line-height: 1;
  padding: 4px 7px; border-radius: 999px;
  background: rgba(10,10,12,.58); color: #ececf0;
  border: 1px solid rgba(255,255,255,.16);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  pointer-events: none;
}
.ref-del {
  position: absolute; right: 5px; top: 5px;
  width: 21px; height: 21px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(10,10,12,.58); color: #ececf0;
  font-family: var(--font); font-size: 13px; line-height: 1;
  cursor: pointer; opacity: 0;
  transition: opacity .18s var(--ease), background .18s var(--ease);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.ref-item:hover .ref-del, .ref-del:focus-visible { opacity: 1 }
.ref-del:hover { background: rgba(214,74,74,.85); border-color: transparent }
.ref-add {
  flex: 1 1 0; min-width: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  border: 1px dashed var(--line-2); border-radius: 0;
  color: var(--dim); cursor: pointer; background: rgba(255,255,255,.012);
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.ref-add:hover { color: var(--muted); background: rgba(200,168,107,.05); border-color: rgba(200,168,107,.42) }
.ref-add svg { width: 17px; height: 17px }
.ref-add span { font-size: 10.5px; letter-spacing: .08em }

/* 底栏 */
.composer-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; padding: 12px 10px 6px;
}

.ghost {
  display: inline-flex; align-items: center; gap: 7px;
  background: transparent; border: 0; cursor: pointer;
  color: var(--dim); font-family: var(--font); font-size: 12.5px;
  padding: 8px 10px; border-radius: 8px;
  transition: color .2s var(--ease), background .2s var(--ease);
}
.ghost:hover { color: var(--muted); background: var(--surface) }
.ghost svg { width: 14px; height: 14px }
.ghost[aria-expanded="true"] { color: var(--muted) }

.cta {
  display: inline-flex; align-items: center; gap: 10px;
  background: #f2f2f4; color: #0a0a0c;
  border: 0; cursor: pointer;
  font-family: var(--font); font-size: 14px; font-weight: 500;
  letter-spacing: .01em;
  padding: 12px 22px; border-radius: 10px;
  transition: transform .2s var(--ease), background .2s var(--ease), opacity .2s var(--ease);
}
.cta-arrow { width: 15px; height: 15px; transition: transform .25s var(--ease) }
.cta:hover:not(:disabled) { background: #fff; transform: translateY(-1px) }
.cta:hover:not(:disabled) .cta-arrow { transform: translateX(3px) }
.cta:active:not(:disabled) { transform: translateY(0) }
.cta:disabled { opacity: .28; cursor: not-allowed }

/* 高级设置 */
.advanced {
  display: grid; gap: 2px;
  padding: 8px 10px 10px;
  border-top: 1px solid var(--line);
  margin-top: 4px;
  animation: slideIn .28s var(--ease);
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px) }
  to   { opacity: 1; transform: translateY(0) }
}

.adv-row {
  display: grid; grid-template-columns: 68px 1fr;
  align-items: center; gap: 14px;
  padding: 9px 0;
}
.adv-label { font-size: 12px; color: var(--dim); letter-spacing: .04em }

.segmented {
  display: inline-flex; gap: 3px; padding: 3px;
  background: rgba(0,0,0,.34);
  border: 1px solid var(--line);
  border-radius: 9px;
  width: fit-content;
}
.segmented button {
  background: transparent; border: 0; cursor: pointer;
  color: var(--muted); font-family: var(--font); font-size: 12.5px;
  padding: 6px 15px; border-radius: 6px;
  transition: color .18s var(--ease), background .18s var(--ease);
}
.segmented button:hover { color: var(--text) }
.segmented button[aria-pressed="true"] {
  background: rgba(255,255,255,.085);
  color: var(--text);
}

.adv-field { display: flex; align-items: center; gap: 8px }
.adv-field input, .adv-field select {
  flex: 1; min-width: 0;
  background: rgba(0,0,0,.34);
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--text); font-family: var(--font); font-size: 13px;
  padding: 9px 13px; outline: 0;
  transition: border-color .2s var(--ease);
}
.adv-field input:focus, .adv-field select:focus { border-color: var(--line-3) }
.adv-field select { appearance: none; cursor: pointer; padding-right: 30px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238e8e99' stroke-width='1.5' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; background-size: 15px;
}
.adv-field select option { background: #16161a; color: var(--text) }

.mini {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted); font-family: var(--font); font-size: 12px;
  padding: 6px 12px; cursor: pointer; text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
  white-space: nowrap;
}
.mini:hover { color: var(--text); border-color: var(--line-2); background: var(--surface) }
.mini.danger:hover { color: var(--danger); border-color: rgba(217,112,95,.4) }

/* ---------------------------------------------------------- 结果区 */

.result {
  margin-top: 26px;
  animation: riseIn .5s var(--ease);
}
@keyframes riseIn {
  from { opacity: 0; transform: translateY(16px) }
  to   { opacity: 1; transform: translateY(0) }
}

.frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #050506;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 40px 90px -50px rgba(0,0,0,1), inset 0 1px 0 rgba(255,255,255,.04);
}
.frame[data-vertical="1"] { aspect-ratio: auto; height: min(74vh, 640px) }

.frame video {
  width: 100%; height: 100%;
  object-fit: contain;
  background: #050506;
  display: block;
}

/* 生成中遮罩 */
.overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(600px 400px at 50% 50%, rgba(200,168,107,.045), transparent 70%), #08080a;
}
.overlay[hidden] { display: none }

.ov-inner {
  width: min(340px, 74%);
  display: flex; flex-direction: column; align-items: center; gap: 18px;
  text-align: center;
}

.ov-spinner {
  width: 30px; height: 30px; border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,.1);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }
@media (prefers-reduced-motion: reduce) { .ov-spinner { animation-duration: 3s } }

.ov-stage {
  font-size: 13px; color: var(--muted);
  letter-spacing: .08em;
}

.ov-track {
  width: 100%; height: 2px;
  background: rgba(255,255,255,.08);
  border-radius: 2px; overflow: hidden;
}
.ov-track i {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, rgba(200,168,107,.35), var(--accent));
  border-radius: 2px;
  transition: width .6s var(--ease);
}

.ov-meta {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11.5px; color: var(--dim);
  font-variant-numeric: tabular-nums;
}

/* 成片信息条 */
.frame-bar {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  background: linear-gradient(0deg, rgba(0,0,0,.9), rgba(0,0,0,.55) 55%, transparent);
  animation: fadeIn .4s var(--ease);
}
@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }
.frame-bar[hidden] { display: none }

.frame-name {
  font-size: 12.5px; color: var(--muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 62%;
}
.frame-actions { display: flex; gap: 8px; flex-shrink: 0 }
.frame-actions .mini { background: rgba(0,0,0,.5); backdrop-filter: blur(10px) }

/* ---------------------------------------------------------- 提示条 */

.toast {
  position: fixed; left: 50%; bottom: 34px;
  transform: translate(-50%, 20px);
  background: rgba(20,20,23,.96);
  border: 1px solid var(--line-2);
  border-radius: 11px;
  padding: 12px 20px;
  font-size: 13px; color: var(--text);
  box-shadow: 0 24px 50px -20px rgba(0,0,0,.9);
  opacity: 0; pointer-events: none;
  transition: opacity .28s var(--ease), transform .28s var(--ease);
  z-index: 50; max-width: min(520px, 88vw); text-align: center;
}
.toast[data-show="1"] { opacity: 1; transform: translate(-50%, 0) }
.toast[data-kind="error"] { border-color: rgba(217,112,95,.45); color: #f0b8ae }

/* ---------------------------------------------------------- 响应式 */

@media (max-width: 820px) {
  .topbar { padding: 18px 20px }
  .stage { padding: 0 20px 70px }
  .hero { padding: 40px 0 32px }
  .composer-body { grid-template-columns: 1fr }
  .col { min-height: 0 }
  .col-prompt { min-height: 190px }
  .col-ref { min-height: 190px }
  .frame { aspect-ratio: 9 / 16; height: auto; max-height: 74vh }
  .adv-row { grid-template-columns: 58px 1fr }
  .composer-foot { flex-direction: row-reverse; flex-wrap: wrap }
  .mode-bar { grid-template-columns: 1fr }
  .mode-desc { display: none }
}

/* ---------------------------------------------------------- 模式切换 */

.mode-bar {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 6px 6px 2px;
}
.mode-btn {
  position: relative;
  display: flex; flex-direction: column; align-items: flex-start; gap: 3px;
  background: rgba(0,0,0,.26);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 16px;
  cursor: pointer; text-align: left;
  font-family: var(--font);
  transition: border-color .22s var(--ease), background .22s var(--ease);
}
.mode-btn:hover { border-color: var(--line-2) }
.mode-btn[aria-selected="true"] {
  border-color: rgba(200,168,107,.5);
  background: linear-gradient(180deg, rgba(200,168,107,.1), rgba(200,168,107,.03));
}
.mode-btn[aria-selected="true"]::after {
  content: ""; position: absolute; top: 14px; right: 14px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(200,168,107,.7);
}
.mode-name {
  font-size: 14.5px; font-weight: 500; color: var(--text);
  letter-spacing: .02em;
}
.mode-desc { font-size: 11.5px; color: var(--dim); letter-spacing: .03em }

.engine-line {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px 4px;
}
.engine-tag {
  font-size: 11px; letter-spacing: .08em;
  color: var(--accent);
  border: 1px solid rgba(200,168,107,.28);
  background: rgba(200,168,107,.06);
  border-radius: 999px;
  padding: 3px 11px;
  white-space: nowrap;
}
.engine-hint { font-size: 12px; color: var(--dim) }

.adv-unit { font-size: 11.5px; color: var(--dim); white-space: nowrap }
.adv-field textarea {
  flex: 1; min-width: 0;
  background: rgba(0,0,0,.34);
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--text); font-family: var(--font); font-size: 13px;
  padding: 9px 13px; outline: 0; resize: vertical;
  transition: border-color .2s var(--ease);
}
.adv-field textarea:focus { border-color: var(--line-3) }

/* hidden 属性需要覆盖 flex/grid 布局 */
.col[hidden], .adv-row[hidden], .mode-bar[hidden] { display: none !important }