/* ========== Material Design 3 Theme ========== */
:root {
  /* MD3 Primary */
  --md-primary: #6750A4;
  --md-on-primary: #FFFFFF;
  --md-primary-container: #EADDFF;
  --md-on-primary-container: #21005D;
  
  /* MD3 Secondary */
  --md-secondary: #625B71;
  --md-on-secondary: #FFFFFF;
  --md-secondary-container: #E8DEF8;
  --md-on-secondary-container: #1D192B;
  
  /* MD3 Tertiary */
  --md-tertiary: #7D5260;
  --md-on-tertiary: #FFFFFF;
  --md-tertiary-container: #FFD8E4;
  --md-on-tertiary-container: #31111D;
  
  /* MD3 Surface */
  --md-surface-dim: #141218;
  --md-surface: #1D1B20;
  --md-surface-bright: #3B383E;
  --md-surface-container-lowest: #0F0D13;
  --md-surface-container-low: #1D1B20;
  --md-surface-container: #211F26;
  --md-surface-container-high: #2B2930;
  --md-surface-container-highest: #36343B;
  
  /* MD3 On Surface */
  --md-on-surface: #E6E0E9;
  --md-on-surface-variant: #CAC4D0;
  
  /* MD3 Outline */
  --md-outline: #938F99;
  --md-outline-variant: #49454F;
  
  /* MD3 Error */
  --md-error: #FFB4AB;
  --md-on-error: #690005;
  --md-error-container: #93000A;
  --md-on-error-container: #FFDAD6;
  
  /* MD3 Elevation Shadows */
  --md-elevation-1: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-elevation-2: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.3);
  --md-elevation-4: 0 6px 10px 4px rgba(0, 0, 0, 0.15), 0 2px 3px rgba(0, 0, 0, 0.3);
  --md-elevation-5: 0 8px 12px 6px rgba(0, 0, 0, 0.15), 0 4px 4px rgba(0, 0, 0, 0.3);
  
  /* MD3 Shape */
  --md-corner-none: 0px;
  --md-corner-extra-small: 4px;
  --md-corner-small: 8px;
  --md-corner-medium: 12px;
  --md-corner-large: 16px;
  --md-corner-extra-large: 28px;
  --md-corner-full: 9999px;
  
  /* Custom aliases */
  --primary: var(--md-primary);
  --surface: var(--md-surface-container);
  --muted: var(--md-on-surface-variant);
}

/* ========== Material Design Typography ========== */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

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

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--md-surface-dim);
  color: var(--md-on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* MD3 Typography Scale */
.display-large { font-size: 57px; font-weight: 400; line-height: 64px; }
.display-medium { font-size: 45px; font-weight: 400; line-height: 52px; }
.display-small { font-size: 36px; font-weight: 400; line-height: 44px; }
.headline-large { font-size: 32px; font-weight: 400; line-height: 40px; }
.headline-medium { font-size: 28px; font-weight: 400; line-height: 36px; }
.headline-small { font-size: 24px; font-weight: 400; line-height: 32px; }
.title-large { font-size: 22px; font-weight: 400; line-height: 28px; }
.title-medium { font-size: 16px; font-weight: 500; line-height: 24px; letter-spacing: 0.15px; }
.title-small { font-size: 14px; font-weight: 500; line-height: 20px; letter-spacing: 0.1px; }
.body-large { font-size: 16px; font-weight: 400; line-height: 24px; letter-spacing: 0.5px; }
.body-medium { font-size: 14px; font-weight: 400; line-height: 20px; letter-spacing: 0.25px; }
.body-small { font-size: 12px; font-weight: 400; line-height: 16px; letter-spacing: 0.4px; }
.label-large { font-size: 14px; font-weight: 500; line-height: 20px; letter-spacing: 0.1px; }
.label-medium { font-size: 12px; font-weight: 500; line-height: 16px; letter-spacing: 0.5px; }
.label-small { font-size: 11px; font-weight: 500; line-height: 16px; letter-spacing: 0.5px; }

/* ========== Material Design Buttons ========== */
.btn {
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1px;
  padding: 10px 24px;
  border-radius: var(--md-corner-full);
  border: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: var(--md-elevation-1);
}

.btn:hover {
  box-shadow: var(--md-elevation-2);
}

.btn:active {
  box-shadow: var(--md-elevation-1);
}

.btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
  box-shadow: none;
}

/* Filled Button (Primary) */
.btn--primary {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.btn--primary:hover {
  background: linear-gradient(rgba(255,255,255,0.08), rgba(255,255,255,0.08)), var(--md-primary);
}

/* Filled Tonal Button */
.btn--seg {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

.btn--seg:hover {
  background: linear-gradient(rgba(0,0,0,0.08), rgba(0,0,0,0.08)), var(--md-secondary-container);
}

/* Outlined Button */
.btn--ghost {
  background: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
  box-shadow: none;
}

.btn--ghost:hover {
  background: rgba(103, 80, 164, 0.08);
}

/* Small Button */
.btn--small {
  padding: 6px 16px;
  font-size: 13px;
  min-height: 32px;
}

/* Checkbox */
.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  color: var(--md-on-surface);
  font-size: 14px;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 8px;
  transition: background-color 0.2s ease;
}

.checkbox-label:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--md-primary);
}

.checkbox-label input[type="checkbox"]:checked + span {
  color: var(--md-primary);
}

/* Icon Button */
.icon-btn {
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--md-corner-full);
  border: none;
  background: transparent;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: rgba(202, 196, 208, 0.08);
}

.icon-btn--del {
  color: var(--md-error);
}

.icon-btn--del:hover {
  background: rgba(255, 180, 171, 0.08);
}

/* ========== Material Design Cards ========== */
.slot-card, .history__card {
  background: var(--md-surface-container);
  border-radius: var(--md-corner-large);
  padding: 16px;
  box-shadow: var(--md-elevation-1);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.slot-card:hover {
  box-shadow: var(--md-elevation-2);
}

.slot-card__label {
  color: var(--md-on-surface-variant);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
  text-align: center;
}

.slot-card__name {
  text-align: center;
  font-weight: 500;
  margin-top: 12px;
  color: var(--md-on-surface);
  font-size: 14px;
}

/* ========== Slot Styles ========== */
.slot {
  background: var(--md-surface-container-lowest);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-medium);
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
  contain: content;
  margin: 0 auto;
}

.slot__window {
  position: absolute;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  will-change: transform;
  transition: transform 5s cubic-bezier(0.12, 0.8, 0.12, 1);
}

.slot__item {
  width: 100%;
  text-align: center;
  font-size: 16px;
  font-weight: 500;
  padding: 8px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-corner-small);
  border: 1px solid var(--md-outline-variant);
  transform: translateZ(0);
}

.slot__item img {
  background: var(--md-surface-container-lowest);
  border-radius: var(--md-corner-small);
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.slot__item > div { display: none; }

/* ========== History ========== */
.history {
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-large);
  padding: 16px;
  box-shadow: var(--md-elevation-1);
}

.history__grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-top: 12px;
}

@media (max-width: 1200px) {
  .history__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .history__grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}

.history__card {
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-medium);
  padding: 12px;
  display: grid;
  gap: 8px;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.history__card:hover {
  background: var(--md-surface-container-highest);
  box-shadow: var(--md-elevation-2);
}

.history__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;
  color: var(--md-on-surface);
}

.history__items {
  display: grid;
  gap: 4px;
  font-size: 13px;
  color: var(--md-on-surface-variant);
}

.history__items b {
  color: var(--md-on-surface);
  font-weight: 500;
  margin-right: 4px;
}

.history__meta {
  color: var(--md-on-surface-variant);
  font-size: 11px;
  opacity: 0.7;
}

.history__actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 4px;
}

/* ========== Layout ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

header {
  background: var(--md-surface-container);
  border-bottom: 1px solid var(--md-outline-variant);
  padding: 16px 0;
  box-shadow: var(--md-elevation-2);
}

.title {
  font-size: 32px;
  font-weight: 400;
  text-align: center;
  background: linear-gradient(135deg, var(--md-primary), var(--md-tertiary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: 14px;
  margin-bottom: 16px;
}

/* ========== Tier Selector ========== */
.tiers {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 24px 0;
}

.tier-btn {
  min-width: 56px;
  height: 40px;
  padding: 0 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--md-corner-full);
  border: 1px solid var(--md-outline);
  background: transparent;
  color: var(--md-on-surface);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tier-btn:hover {
  background: rgba(202, 196, 208, 0.08);
  border-color: var(--md-primary);
}

.tier-btn.active {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: var(--md-primary);
}

/* ========== Slots Grid ========== */
.slots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

/* ========== Controls ========== */
.controls {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin: 24px 0;
  flex-wrap: wrap;
}

/* ========== Admin Panel ========== */
details {
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-large);
  padding: 16px;
  margin: 16px 0;
  box-shadow: var(--md-elevation-1);
}

summary {
  font-weight: 500;
  font-size: 16px;
  cursor: pointer;
  color: var(--md-on-surface);
  padding: 8px 0;
  transition: color 0.2s;
}

summary:hover {
  color: var(--md-primary);
}

/* ========== Modal ========== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: none;
}

.modal[aria-hidden="false"] {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal__backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal__dialog {
  position: relative;
  background: var(--md-surface-container-high);
  border-radius: var(--md-corner-extra-large);
  padding: 24px;
  max-width: 500px;
  width: 90%;
  box-shadow: var(--md-elevation-5);
  z-index: 1;
}

.modal__header h2 {
  font-size: 24px;
  font-weight: 400;
  color: var(--md-on-surface);
  margin-bottom: 16px;
}

.modal__body {
  margin: 16px 0;
}

.modal__footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ========== Form Elements ========== */
input[type="text"],
input[type="number"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-corner-small);
  color: var(--md-on-surface);
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  transition: all 0.2s;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 2px rgba(103, 80, 164, 0.2);
}

label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .container {
    padding: 16px;
  }

  .title {
    font-size: 24px;
  }

  .slots {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
  }
}

/* ========== Admin: Users Tokens Spoiler ========== */
.users-tokens-spoiler {
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-large);
  padding: 0;
  margin: 16px 0;
  box-shadow: var(--md-elevation-1);
}

.users-tokens-spoiler summary {
  padding: 16px;
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  background: var(--md-surface-container-high);
  border-radius: var(--md-corner-large) var(--md-corner-large) 0 0;
}

.users-tokens-spoiler .user-list {
  padding: 16px;
  margin: 0;
  list-style: none;
}

/* ========== Admin: Missing Images Grid ========== */
.missing-images-spoiler {
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-large);
  padding: 0;
  margin: 16px 0;
  box-shadow: var(--md-elevation-1);
}

.missing-images-spoiler summary {
  padding: 16px;
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  background: var(--md-error-container);
  color: var(--md-on-error-container);
  border-radius: var(--md-corner-large) var(--md-corner-large) 0 0;
  cursor: pointer;
}

.missing-images-spoiler summary:hover {
  filter: brightness(1.05);
}

.missing-images-grid {
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

.missing-item {
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-corner-medium);
  padding: 12px;
  display: flex;
  gap: 12px;
  align-items: center;
  transition: all 0.2s;
}

.missing-item:hover {
  box-shadow: var(--md-elevation-2);
  border-color: var(--md-primary);
}

.missing-item__preview {
  width: 60px;
  height: 60px;
  border-radius: var(--md-corner-small);
  background: var(--md-surface-container-lowest);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.missing-item__preview svg {
  width: 32px;
  height: 32px;
  stroke: var(--md-muted);
  stroke-width: 2;
  fill: none;
}

.missing-item__info {
  flex: 1;
  min-width: 0;
}

.missing-item__name {
  font-weight: 500;
  font-size: 14px;
  color: var(--md-on-surface);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.missing-item__meta {
  font-size: 12px;
  color: var(--md-on-surface-variant);
  margin-bottom: 8px;
}

.missing-item__actions {
  display: flex;
  gap: 8px;
}

.missing-item__upload {
  padding: 6px 12px;
  font-size: 12px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border: none;
  border-radius: var(--md-corner-full);
  cursor: pointer;
  transition: all 0.2s;
}

.missing-item__upload:hover {
  box-shadow: var(--md-elevation-1);
}