/* ═══════════════════════════════════════════════════════════════
   SIAS Grade Uploader — Web Version
   Glassmorphism · Navy Blue · Dark / Light Mode
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. CSS Custom Properties ──────────────────────────────── */
:root {
  --bg-from:        #020c1b;
  --bg-to:          #0d1f3c;

  --orb-1:          rgba(30,  64, 175, 0.45);
  --orb-2:          rgba(29,  78, 216, 0.30);
  --orb-3:          rgba(59, 130, 246, 0.20);

  --glass-bg:       rgba(255, 255, 255, 0.055);
  --glass-bg-inner: rgba(255, 255, 255, 0.04);
  --glass-border:   rgba(255, 255, 255, 0.11);
  --glass-shadow:   rgba(0,   0,   0,  0.45);
  --glass-hover:    rgba(255, 255, 255, 0.08);

  --header-bg:      rgba(2,  12,  27, 0.82);
  --header-border:  rgba(255, 255, 255, 0.09);

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;
  --text-code:      #93c5fd;

  --accent:         #3b82f6;
  --accent-hover:   #2563eb;
  --accent-active:  #1d4ed8;
  --accent-glow:    rgba(59, 130, 246, 0.30);
  --accent-subtle:  rgba(59, 130, 246, 0.12);

  --success:        #22c55e;
  --success-bg:     rgba(34, 197,  94, 0.12);
  --success-border: rgba(34, 197,  94, 0.30);
  --error:          #f87171;
  --error-bg:       rgba(248, 113, 113, 0.12);
  --error-border:   rgba(248, 113, 113, 0.30);
  --warn:           #fbbf24;
  --warn-bg:        rgba(251, 191,  36, 0.12);
  --warn-border:    rgba(251, 191,  36, 0.30);
  --info:           #60a5fa;
  --info-bg:        rgba(96, 165, 250, 0.12);
  --info-border:    rgba(96, 165, 250, 0.30);

  --input-bg:          rgba(255, 255, 255, 0.06);
  --input-border:      rgba(255, 255, 255, 0.14);
  --input-focus:       rgba(59, 130, 246, 0.50);
  --input-placeholder: rgba(148, 163, 184, 0.60);

  --table-head-bg: rgba(255, 255, 255, 0.06);
  --table-row-alt: rgba(255, 255, 255, 0.025);
  --table-invalid: rgba(248, 113, 113, 0.10);
  --table-border:  rgba(255, 255, 255, 0.07);

  --radius-sm: 2px;
  --radius-md: 2px;
  --radius-lg: 2px;
  --radius-xl: 2px;
  --transition: 0.22s ease;
}

/* ── Light Mode ────────────────────────────────────────────── */
[data-theme="light"] {
  --bg-from: #dbeafe;
  --bg-to:   #eff6ff;

  --glass-bg:       rgba(255, 255, 255, 0.58);
  --glass-bg-inner: rgba(255, 255, 255, 0.40);
  --glass-border:   rgba(255, 255, 255, 0.85);
  --glass-shadow:   rgba(30,  58, 138, 0.12);
  --glass-hover:    rgba(255, 255, 255, 0.70);

  --header-bg:     rgba(239, 246, 255, 0.86);
  --header-border: rgba(147, 197, 253, 0.35);

  --text-primary:   #0f172a;
  --text-secondary: #334155;
  --text-muted:     #64748b;
  --text-code:      #1d4ed8;

  --accent-glow:   rgba(37,  99, 235, 0.20);
  --accent-subtle: rgba(37,  99, 235, 0.10);

  --success-bg:     rgba(20, 158,  68, 0.10);
  --error:          #dc2626;
  --error-bg:       rgba(220,  38,  38, 0.08);
  --error-border:   rgba(220,  38,  38, 0.25);
  --warn:           #d97706;
  --warn-bg:        rgba(217, 119,   6, 0.08);
  --warn-border:    rgba(217, 119,   6, 0.25);
  --info:           #2563eb;
  --info-bg:        rgba(37,  99, 235, 0.08);
  --info-border:    rgba(37,  99, 235, 0.25);

  --input-bg:          rgba(255, 255, 255, 0.70);
  --input-border:      rgba(147, 197, 253, 0.55);
  --input-focus:       rgba(37,  99, 235, 0.40);
  --input-placeholder: rgba(100, 116, 139, 0.70);

  --table-head-bg: rgba(37,  99, 235, 0.07);
  --table-row-alt: rgba(37,  99, 235, 0.03);
  --table-invalid: rgba(220,  38,  38, 0.07);
  --table-border:  rgba(147, 197, 253, 0.25);
}

/* ── 2. Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
  min-height: 100vh;
  background: #020c1b;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: color var(--transition);
}
[data-theme="light"] body { background: #bfdbfe; }

code {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 0.88em;
  color: var(--text-code);
  background: var(--accent-subtle);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ── 3. Ocean Wave Background ──────────────────────────────── */
/*                                                              */
/*   Each .wave is a full-width div with an SVG sine-wave path */
/*   as its background-image (repeat-x). Animating             */
/*   background-position by exactly one period (1440px) gives  */
/*   seamless horizontal scrolling at different speeds.        */
/*   Layers stacked bottom-up create depth / parallax.         */

.bg-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
  background: linear-gradient(180deg, #020c1b 0%, #061525 55%, #0c2040 100%);
}
[data-theme="light"] .bg-layer {
  background: linear-gradient(180deg, #bfdbfe 0%, #dbeafe 60%, #e8f2ff 100%);
}

/* Grid glow canvas — sits between waves and grid lines */
#grid-glow {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

/* Subtle fixed grid sits above the waves */
.bg-layer::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 5;
  background-image:
    linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
[data-theme="light"] .bg-layer::after {
  background-image:
    linear-gradient(rgba(37,99,235,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.05) 1px, transparent 1px);
}

/* Shared wave shell */
.wave {
  position: absolute;
  left: 0; right: 0;
  background-repeat: repeat-x;
  background-position: 0 bottom;
}

/* ── Wave 1 — deep, slow, large crests ── */
.wave-1 {
  bottom: -20px;
  height: 220px;
  background-size: 1440px 220px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 220'%3E%3Cpath fill='rgba(17,50,130,0.75)' d='M0,110 C360,178 720,42 1080,110 C1260,144 1380,120 1440,110 L1440,220 L0,220 Z'/%3E%3C/svg%3E");
  animation: waveR 22s linear infinite;
}
[data-theme="light"] .wave-1 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 220'%3E%3Cpath fill='rgba(37,99,235,0.42)' d='M0,110 C360,178 720,42 1080,110 C1260,144 1380,120 1440,110 L1440,220 L0,220 Z'/%3E%3C/svg%3E");
}

/* ── Wave 2 — mid depth, opposite direction ── */
.wave-2 {
  bottom: -10px;
  height: 180px;
  background-size: 1440px 180px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 180'%3E%3Cpath fill='rgba(28,78,216,0.55)' d='M0,80 C300,142 600,18 900,80 C1050,111 1200,64 1440,80 L1440,180 L0,180 Z'/%3E%3C/svg%3E");
  animation: waveL 16s linear infinite;
}
[data-theme="light"] .wave-2 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 180'%3E%3Cpath fill='rgba(59,130,246,0.34)' d='M0,80 C300,142 600,18 900,80 C1050,111 1200,64 1440,80 L1440,180 L0,180 Z'/%3E%3C/svg%3E");
}

/* ── Wave 3 — choppier, faster, two crests per period ── */
.wave-3 {
  bottom: 0;
  height: 140px;
  background-size: 1440px 140px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 140'%3E%3Cpath fill='rgba(59,130,246,0.38)' d='M0,65 C180,102 360,28 540,65 C720,102 900,28 1080,65 C1260,102 1350,72 1440,65 L1440,140 L0,140 Z'/%3E%3C/svg%3E");
  animation: waveR 11s linear infinite;
  animation-delay: -4s;
}
[data-theme="light"] .wave-3 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 140'%3E%3Cpath fill='rgba(96,165,250,0.28)' d='M0,65 C180,102 360,28 540,65 C720,102 900,28 1080,65 C1260,102 1350,72 1440,65 L1440,140 L0,140 Z'/%3E%3C/svg%3E");
}

/* ── Wave 4 — surface foam, fast, high-frequency ── */
.wave-4 {
  bottom: 10px;
  height: 100px;
  background-size: 1440px 100px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100'%3E%3Cpath fill='rgba(125,200,255,0.22)' d='M0,40 C90,62 180,18 270,40 C360,62 450,18 540,40 C630,62 720,18 810,40 C900,62 990,18 1080,40 C1170,62 1260,18 1350,40 C1395,51 1418,46 1440,40 L1440,100 L0,100 Z'/%3E%3C/svg%3E");
  animation: waveL 7s linear infinite;
  animation-delay: -2s;
}
[data-theme="light"] .wave-4 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100'%3E%3Cpath fill='rgba(147,210,255,0.22)' d='M0,40 C90,62 180,18 270,40 C360,62 450,18 540,40 C630,62 720,18 810,40 C900,62 990,18 1080,40 C1170,62 1260,18 1350,40 C1395,51 1418,46 1440,40 L1440,100 L0,100 Z'/%3E%3C/svg%3E");
}

/* Scrolling keyframes — L and R so waves go in opposite directions */
@keyframes waveR {
  from { background-position:    0 bottom; }
  to   { background-position: 1440px bottom; }
}
@keyframes waveL {
  from { background-position: 1440px bottom; }
  to   { background-position:    0 bottom; }
}

/* ── 4. App Shell ──────────────────────────────────────────── */
.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── 5. Glass Header ───────────────────────────────────────── */
.glass-header {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  height: 62px;
  background: var(--header-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--header-border);
  transition: background var(--transition), border-color var(--transition);
}

.header-logo { display: flex; align-items: center; gap: 10px; }
.logo-icon   { flex-shrink: 0; }
.logo-text   { display: flex; flex-direction: row; align-items: center; gap: 8px; }
.logo-main   { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); letter-spacing: 0.04em; }
.logo-main::after { content: '·'; margin-left: 8px; color: var(--text-muted, var(--text-secondary)); font-weight: 400; }
.logo-sub    { font-size: 0.85rem; color: var(--text-secondary); letter-spacing: 0.02em; text-transform: uppercase; }

.header-right { display: flex; align-items: center; gap: 10px; }

.user-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px 4px 8px;
  border-radius: 2px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-glow);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.icon-btn:hover { background: var(--glass-hover); color: var(--text-primary); }
.icon-btn svg   { display: block; }

/* ── 6. Main Content ───────────────────────────────────────── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 32px 20px 60px;
  width: 100%;
}

/* ── 7. Step Navigation ────────────────────────────────────── */
.step-nav {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 620px;
}

.step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.step-dot {
  position: relative;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  background: var(--glass-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition);
}
.step-num   { transition: opacity var(--transition); }
.step-check {
  position: absolute;
  opacity: 0;
  font-size: 0.75rem;
  transition: opacity var(--transition);
}
.step-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--transition);
}
.step-line {
  flex: 1;
  height: 2px;
  background: var(--glass-border);
  margin-bottom: 22px;
  transition: background var(--transition);
}

.step-item.active .step-dot {
  border-color: var(--accent);
  background: var(--accent-subtle);
  color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.step-item.active .step-label { color: var(--accent); font-weight: 600; }

.step-item.completed .step-dot {
  border-color: var(--success);
  background: var(--success-bg);
  color: var(--success);
}
.step-item.completed .step-num   { opacity: 0; }
.step-item.completed .step-check { opacity: 1; }
.step-item.completed .step-label { color: var(--success); }
.step-line.completed { background: var(--success); }

/* ── 8. Status Bar ─────────────────────────────────────────── */
.status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 760px;
  padding: 11px 16px;
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: 0.875rem;
  font-weight: 500;
  animation: slideDown 0.22s ease;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.status-bar.status-error   { background: var(--error-bg);   border-color: var(--error-border);   color: var(--error); }
.status-bar.status-success { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.status-bar.status-warn    { background: var(--warn-bg);    border-color: var(--warn-border);    color: var(--warn); }
.status-bar.status-info    { background: var(--info-bg);    border-color: var(--info-border);    color: var(--info); }

.status-icon  { font-size: 1rem; flex-shrink: 0; }
.status-msg   { flex: 1; }
.status-close {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: inherit;
  opacity: 0.7;
  padding: 0 2px;
  line-height: 1;
  transition: opacity var(--transition);
}
.status-close:hover { opacity: 1; }

/* ── 9. Panels (Glass Cards) ───────────────────────────────── */
.panel {
  display: none;
  width: 100%;
  max-width: 760px;
  background: var(--glass-bg);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 40px var(--glass-shadow);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.panel.active {
  display: block;
  animation: panelIn 0.32s ease forwards;
}
.panel:hover { box-shadow: 0 12px 50px var(--glass-shadow); }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.panel-head { padding: 28px 32px 0; }
.panel-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.panel-sub {
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.panel-body {
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.panel-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 32px;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-bg-inner);
}

/* ── 10. Form Fields ───────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; }

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.field-hint {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.field-input,
.field-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  -webkit-appearance: none;
  appearance: none;
}
.field-input::placeholder { color: var(--input-placeholder); }
.field-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--input-focus);
  background: var(--glass-hover);
}
.field-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--input-focus);
  background-color: var(--glass-hover);
}

.field-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}
[data-theme="light"] .field-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23475569' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
}
.field-select option { background: var(--bg-to); color: var(--text-primary); }

.monospace { font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace; letter-spacing: 0.05em; }

/* Password input with icon */
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap .field-input { padding-right: 42px; }
.input-icon-btn {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  transition: color var(--transition);
}
.input-icon-btn:hover { color: var(--text-primary); }

/* ── 11. Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:not(:disabled):active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-active) 100%);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.btn-primary:not(:disabled):hover {
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-active) 100%);
  box-shadow: 0 6px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--glass-bg);
  color: var(--text-secondary);
  border-color: var(--glass-border);
  backdrop-filter: blur(8px);
}
.btn-ghost:not(:disabled):hover {
  background: var(--glass-hover);
  color: var(--text-primary);
  border-color: var(--accent);
}

.btn-sm   { padding: 7px 14px; font-size: 0.8rem; }
.btn-full { width: 100%; padding: 12px; font-size: 0.95rem; }

.btn-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font-size: inherit;
  font-family: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}
.btn-link:hover { color: var(--accent-hover); }

/* Button spinner */
.btn-spin {
  width: 15px; height: 15px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── 12. Login Panel ───────────────────────────────────────── */
.login-body { max-width: 420px; width: 100%; margin: 0 auto; gap: 16px; }
.login-body .btn-full { margin-bottom: 12px; }

/* ── 13. User Info Strip ───────────────────────────────────── */
.user-strip {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--glass-bg-inner);
  border: 1px solid var(--glass-border);
  flex-wrap: wrap;
  gap: 8px;
}
.glass-inner {
  background: var(--glass-bg-inner);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}
.ui-item { display: flex; flex-direction: column; flex: 1; min-width: 120px; }
.ui-lbl  { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); font-weight: 600; }
.ui-val  { font-size: 0.85rem; color: var(--text-primary); font-weight: 600; margin-top: 2px; }
.ui-sep  { width: 1px; align-self: stretch; background: var(--glass-border); flex-shrink: 0; }

/* ── 14. Template Chips ────────────────────────────────────── */
.tpl-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  border: 1px solid var(--accent-glow);
}
.chip-lbl { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); font-weight: 700; }
.chip-val { font-size: 0.82rem; color: var(--text-primary); font-weight: 600; font-family: 'Cascadia Code', monospace; }

.tpl-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-left: 3px solid var(--accent);
  background: var(--accent-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ── 15. Custom Config ─────────────────────────────────────── */
.custom-cfg {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--glass-bg-inner);
  border: 1px solid var(--glass-border);
}
.cfg-row   { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cfg-row-3 { grid-template-columns: 1fr 1fr 1fr; }

/* ── 16. Drop Zone ─────────────────────────────────────────── */
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px 24px;
  border-radius: var(--radius-lg);
  border: 2px dashed var(--glass-border);
  background: var(--glass-bg-inner);
  cursor: pointer;
  text-align: center;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--accent);
  background: var(--accent-subtle);
  outline: none;
}
.drop-zone.drop-active {
  border-color: var(--accent);
  background: var(--accent-subtle);
  transform: scale(1.01);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.drop-icon { color: var(--text-muted); transition: color var(--transition), transform var(--transition); }
.drop-zone:hover .drop-icon,
.drop-zone.drop-active .drop-icon { color: var(--accent); transform: translateY(-4px); }
.drop-main { font-size: 0.95rem; color: var(--text-secondary); font-weight: 500; }
.drop-hint { font-size: 0.82rem; color: var(--text-muted); }

/* ── 17. File List ─────────────────────────────────────────── */
.file-list { display: flex; flex-direction: column; gap: 8px; }

.file-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--glass-bg-inner);
  border: 1px solid var(--glass-border);
  transition: border-color var(--transition);
  animation: chipIn 0.18s ease;
}
@keyframes chipIn {
  from { opacity: 0; transform: translateX(-8px); }
  to   { opacity: 1; transform: translateX(0); }
}
.file-chip:hover { border-color: var(--accent); }
.file-chip-icon  { color: var(--accent); flex-shrink: 0; }
.file-chip-info  { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.file-chip-name  { font-size: 0.85rem; font-weight: 600; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-chip-size  { font-size: 0.72rem; color: var(--text-muted); }
.file-chip-remove {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.2rem;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
}
.file-chip-remove:hover { color: var(--error); background: var(--error-bg); }

/* ── 18. Files Preview (Panel 3) ───────────────────────────── */
.files-preview { display: flex; flex-direction: column; gap: 20px; }

.file-preview-card {
  border-radius: var(--radius-lg);
  background: var(--glass-bg-inner);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
  animation: chipIn 0.25s ease;
}
.file-preview-card:hover { border-color: var(--accent); box-shadow: 0 4px 20px var(--glass-shadow); }

.fpc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--glass-border);
  background: var(--table-head-bg);
  flex-wrap: wrap;
}
.fpc-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 0;
}
.fpc-title span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fpc-title svg  { flex-shrink: 0; color: var(--accent); }
.fpc-badges     { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

.fpc-body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── 19. Badges ────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 2px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: 1px solid;
}
.badge-count { background: var(--info-bg);    border-color: var(--info-border);    color: var(--info); }
.badge-ok    { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.badge-error { background: var(--error-bg);   border-color: var(--error-border);   color: var(--error); }
.badge-warn  { background: var(--warn-bg);    border-color: var(--warn-border);    color: var(--warn); }

/* ── 20. Sheet Warning ─────────────────────────────────────── */
.sheet-warning {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn);
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ── 21. Grade Table ───────────────────────────────────────── */
.grade-details summary {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  user-select: none;
  transition: color var(--transition);
}
.grade-details summary:hover { color: var(--accent); }
.grade-details summary::before {
  content: '▶';
  font-size: 0.6rem;
  color: var(--text-muted);
  transition: transform var(--transition);
}
.grade-details[open] summary::before { transform: rotate(90deg); }
.grade-details summary::-webkit-details-marker { display: none; }

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--table-border);
  margin-top: 4px;
}

.grade-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  white-space: nowrap;
}
.grade-table thead tr  { background: var(--table-head-bg); border-bottom: 1px solid var(--table-border); }
.grade-table th        { padding: 8px 12px; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); text-align: left; }
.grade-table td        { padding: 7px 12px; color: var(--text-primary); border-bottom: 1px solid var(--table-border); }
.grade-table tbody tr:nth-child(even) { background: var(--table-row-alt); }
.grade-table tbody tr:last-child td   { border-bottom: none; }
.grade-table tbody tr.row-invalid     { background: var(--table-invalid) !important; }
.grade-table tbody tr.row-invalid td  { color: var(--error); }

.cell-err-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--error);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  margin-left: 5px;
  cursor: help;
  vertical-align: middle;
  line-height: 1;
}

/* ── Glass Tooltip ─────────────────────────────────────────────── */
.glass-tip {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  max-width: 260px;
  padding: 7px 11px;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--text-primary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.35);
  border-radius: 2px;
  transition: opacity 0.12s ease;
  opacity: 1;
}
.glass-tip--hidden {
  opacity: 0;
  pointer-events: none;
}

.no-data-msg {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 12px 0;
  text-align: center;
  font-style: italic;
}

/* ── 22. Done Panel ────────────────────────────────────────── */
.done-body { align-items: center; padding-top: 32px; padding-bottom: 36px; }

.done-ring {
  width: 82px; height: 82px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  /* default / ok */
  background: var(--success-bg);
  border: 2px solid var(--success-border);
  color: var(--success);
}
.done-ring--ok   { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.done-ring--fail { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.35); color: var(--error); }
.done-ring--warn { background: rgba(234,179,8,0.12); border-color: rgba(234,179,8,0.35); color: #ca8a04; }
@keyframes popIn {
  from { opacity: 0; transform: scale(0.5); }
  to   { opacity: 1; transform: scale(1); }
}

.upload-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 520px;
  margin-bottom: 24px;
}
.result-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid;
  animation: chipIn 0.2s ease;
}
.result-item.result-ok   { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.result-item.result-fail { background: var(--error-bg);   border-color: var(--error-border);   color: var(--error); }
.result-icon   { font-size: 1rem; flex-shrink: 0; }
.result-info   { flex: 1; min-width: 0; }
.result-file   { font-size: 0.85rem; font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.result-detail { font-size: 0.78rem; opacity: 0.85; margin-top: 2px; }

/* ── 23. Utility ───────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── 24. Footer ────────────────────────────────────────────── */
.app-footer {
  position: relative;
  z-index: 1;
  margin-top: auto;
  border-top: 1px solid var(--glass-border);
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 20px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}
.footer-brand span { color: var(--accent); }

.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
}
.footer-links a {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

.footer-copy {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── 25. Responsive ────────────────────────────────────────── */
@media (max-width: 600px) {
  .main-content { padding: 20px 12px 48px; gap: 16px; }
  .panel-head   { padding: 20px 20px 0; }
  .panel-body   { padding: 18px 20px; gap: 14px; }
  .panel-foot   { padding: 14px 20px; flex-wrap: wrap; }
  .panel-title  { font-size: 1.2rem; }
  .step-label   { display: none; }
  .step-nav     { max-width: 340px; }
  .cfg-row      { grid-template-columns: 1fr; }
  .cfg-row-3    { grid-template-columns: 1fr 1fr; }
  .user-strip   { flex-direction: column; align-items: flex-start; }
  .ui-sep       { width: 100%; height: 1px; }
  .glass-header { padding: 0 14px; }
  .logo-main::after { display: none; }
  .logo-sub     { display: none; }
  .fpc-header   { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 380px) {
  .cfg-row-3 { grid-template-columns: 1fr; }
}