/* Tech Theme — 深空霓虹科技配色系统 */
/* 使用方式：给页面 <body> 添加类 .ui-tech-dark 或 .ui-tech-light */

/* ============== Dark Variant ============== */
.ui-tech-dark {
  --tt-grad-angle: 130deg;
  --tt-bg-1: #060B16;
  --tt-bg-2: #0A192F;
  --tt-surface: rgba(13,26,45,0.82);
  --tt-surface-2: rgba(12,24,40,0.68);
  --tt-border: #1F2A3D;

  --tt-text: #FFFFFF;
  --tt-text-secondary: #E6F1FF;
  --tt-text-muted: #8AA7C7;

  --tt-primary: #00D1FF;
  --tt-secondary: #66E0FF;
  --tt-danger: #FF4D6D;
  --tt-success: #1EE2A2;
  --tt-warning: #F9C846;
  --tt-accent: #8D6BFF;
  --tt-focus: rgba(0,209,255,0.45);

  --tt-glass-bg: rgba(10,25,47,0.55);
  --tt-glass-border: rgba(120,185,255,0.18);

  color: var(--tt-text);
  background:
    linear-gradient(var(--tt-grad-angle), var(--tt-bg-1), var(--tt-bg-2)),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 1px, transparent 1px, transparent 20px),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.015) 0px, rgba(255,255,255,0.015) 1px, transparent 1px, transparent 20px);
  font-family: 'Inter', 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

.ui-tech-dark .container { background: var(--tt-surface); color: var(--tt-text); border-radius: 12px; box-shadow: 0 10px 26px rgba(0,0,0,0.35); }
.ui-tech-dark h1 { color: var(--tt-text); }
.ui-tech-dark h2 { color: var(--tt-text); opacity: 0.92; }
.ui-tech-dark h3 { color: var(--tt-text); opacity: 0.88; }

.ui-tech-dark .card,
.ui-tech-dark .result-box,
.ui-tech-dark .modal,
.ui-tech-dark .fees-card,
.ui-tech-dark .cost-card,
.ui-tech-dark .scenario-a-card,
.ui-tech-dark .scenario-b-card {
  background: var(--tt-glass-bg);
  border: 1px solid var(--tt-glass-border);
  border-radius: 12px;
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  backdrop-filter: blur(10px) saturate(120%);
}
@supports not ((backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px))) {
  .ui-tech-dark .card,
  .ui-tech-dark .result-box,
  .ui-tech-dark .modal,
  .ui-tech-dark .fees-card,
  .ui-tech-dark .cost-card,
  .ui-tech-dark .scenario-a-card,
  .ui-tech-dark .scenario-b-card { background: rgba(18,24,36,0.75); }
}

/* 表格强调单元格 */
.ui-tech-dark .suggest-table td.price-cell,
.ui-tech-dark .suggest-table td.profit-cell {
  font-weight: 700; color: #F6F8FA;
  background: #1A1F2B; border: 1px solid #3A4450; border-radius: 10px; text-shadow: none;
}

/* 按钮系统 */
.ui-tech-dark .btn, .ui-tech-dark .button, .ui-tech-dark button {
  font-weight: 600; border-radius: 10px; border: 1px solid var(--tt-glass-border);
  transition: transform 180ms ease, filter 180ms ease, background-color 180ms ease, color 180ms ease;
}
.ui-tech-dark .btn-primary { background: var(--tt-primary); color: #ffffff; border-color: transparent; }
.ui-tech-dark .btn-primary:hover { filter: brightness(0.95); }
.ui-tech-dark .btn-primary:active { transform: translateY(1px) scale(0.99); }
.ui-tech-dark .btn-secondary { background: #1F2937; color: var(--tt-text); border-color: #3B445A; }
.ui-tech-dark .btn-secondary:hover { filter: brightness(0.97); }
.ui-tech-dark .btn-secondary:active { transform: translateY(1px) scale(0.99); }
.ui-tech-dark .btn-danger { background: var(--tt-danger); color: #ffffff; border-color: transparent; }
.ui-tech-dark .btn-danger:hover { filter: brightness(0.95); }
.ui-tech-dark .btn-danger:active { transform: translateY(1px) scale(0.99); }
.ui-tech-dark .btn:disabled, .ui-tech-dark button:disabled { opacity: 0.7; filter: grayscale(20%); cursor: not-allowed; }
.ui-tech-dark .btn:focus-visible { outline: 2px solid var(--tt-focus); box-shadow: 0 0 0 2px rgba(59,130,246,0.25); }

/* 输入/选择 */
.ui-tech-dark input, .ui-tech-dark select, .ui-tech-dark textarea {
  background: rgba(255,255,255,0.10); color: var(--tt-text); border: 1px solid var(--tt-glass-border); border-radius: 8px;
}
.ui-tech-dark input:focus, .ui-tech-dark select:focus, .ui-tech-dark textarea:focus { outline: 2px solid var(--tt-focus); box-shadow: 0 0 0 2px rgba(59,130,246,0.25); }

/* ============== Light Variant (备用) ============== */
.ui-tech-light {
  --tt-grad-angle: 135deg;
  --tt-bg-1: #F4FAFF;
  --tt-bg-2: #E5F2FF;
  --tt-surface: #FFFFFF;
  --tt-surface-2: #F6FAFF;
  --tt-border: #C5E7FF;

  --tt-text: #0A192F;
  --tt-text-secondary: #223958;
  --tt-text-muted: #4E6A8E;

  --tt-primary: #0096FF;
  --tt-secondary: #00B2FF;
  --tt-danger: #FF4D6D;
  --tt-success: #1FBF84;
  --tt-warning: #FFB347;
  --tt-accent: #5E71FF;
  --tt-focus: rgba(0,149,255,0.35);

  --tt-glass-bg: rgba(255,255,255,0.72);
  --tt-glass-border: rgba(8,120,200,0.14);

  color: var(--tt-text);
  background:
    linear-gradient(var(--tt-grad-angle), var(--tt-bg-1), var(--tt-bg-2)),
    repeating-linear-gradient(0deg, rgba(0,40,80,0.015) 0px, rgba(0,40,80,0.015) 1px, transparent 1px, transparent 20px),
    repeating-linear-gradient(90deg, rgba(0,40,80,0.015) 0px, rgba(0,40,80,0.015) 1px, transparent 1px, transparent 20px);
}
.ui-tech-light .container { background: var(--tt-surface); color: var(--tt-text); border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,0.10); }
.ui-tech-light h1 { color: var(--tt-text); }
.ui-tech-light h2 { color: var(--tt-text); opacity: 0.92; }
.ui-tech-light h3 { color: var(--tt-text); opacity: 0.88; }
.ui-tech-light .card, .ui-tech-light .result-box, .ui-tech-light .modal, .ui-tech-light .fees-card, .ui-tech-light .cost-card, .ui-tech-light .scenario-a-card, .ui-tech-light .scenario-b-card { background: var(--tt-glass-bg); border: 1px solid var(--tt-glass-border); border-radius: 12px; -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.ui-tech-light .suggest-table td.price-cell, .ui-tech-light .suggest-table td.profit-cell { font-weight: 700; color: #111827; background: rgba(212,175,55,0.12); border: 1px solid var(--tt-border); border-radius: 10px; text-shadow: none; }
.ui-tech-light .btn, .ui-tech-light .button, .ui-tech-light button { font-weight: 600; border-radius: 10px; border: 1px solid var(--tt-border); transition: transform 180ms ease, filter 180ms ease, background-color 180ms ease, color 180ms ease; }
.ui-tech-light .btn-primary { background: var(--tt-primary); color: #ffffff; border-color: transparent; }
.ui-tech-light .btn-primary:hover { filter: brightness(0.95); }
.ui-tech-light .btn-primary:active { transform: translateY(1px) scale(0.99); }
.ui-tech-light .btn-secondary { background: #EEF2F7; color: var(--tt-text); border-color: var(--tt-border); }
.ui-tech-light .btn-secondary:hover { filter: brightness(0.98); }
.ui-tech-light .btn-secondary:active { transform: translateY(1px) scale(0.99); }
.ui-tech-light .btn-danger { background: var(--tt-danger); color: #ffffff; border-color: transparent; }
.ui-tech-light .btn-danger:hover { filter: brightness(0.95); }
.ui-tech-light .btn-danger:active { transform: translateY(1px) scale(0.99); }
.ui-tech-light .btn:disabled, .ui-tech-light button:disabled { opacity: 0.7; filter: grayscale(20%); cursor: not-allowed; }
.ui-tech-light .btn:focus-visible { outline: 2px solid var(--tt-focus); box-shadow: 0 0 0 2px rgba(37,99,235,0.25); }

/* 高对比度模式 */
@media (forced-colors: active) { .ui-tech-dark, .ui-tech-light { forced-color-adjust: none; } }