/* Layout */
:root {
  --topbar-h: 90px;
  --left-w: 280px;
  --bg: #0e0f12;
  --panel: #151821;
  --panel-2: #1c2030;
  --text: #e6e6e6;
  --muted: #9aa0a6;
  --accent: #4f9cff;
}

html {
  height: 100%;
  margin: 0;
  /* Scrollbar alanını her zaman rezerve et ki görünür/görünmez olurken genişlik değişmesin */
  scrollbar-gutter: stable;
}

body {
  min-height: 500px;  /* Dikey yükseklik minimum 500px */
  min-width: 500px;   /* Ekran genişliği minimum 500px */
  height: 100%;
  margin: 0;
  /* Dikey scrollbar her zaman olsun; var-yok durumu layout'u oynatmasın */
  overflow-y: scroll;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Arial;
}

#app { display: flex; flex-direction: column; height: 100%; }

#topbar {
  min-height: var(--topbar-h);
  background: var(--bg);
  border-bottom: 1px solid #222834;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 10px 16px 12px;
  gap: 16px;
}

#palette {
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  column-gap: 12px;
  row-gap: 4px;
  align-items: flex-start;
  /* Palette'in genişlemesini engelle, sabit boyutta kalsın */
  flex-shrink: 0;
  width: fit-content;
}
#palette .swatches {
  grid-column: 1 / 2;
  grid-row: 1 / 3; /* iki satırı da kaplasın */
  display: grid;
  grid-template-columns: repeat(10, 18px);
  grid-template-rows: repeat(3, 18px);
  gap: 6px;
  background: var(--panel-2);
  padding: 8px; border-radius: 8px; border: 1px solid #2a3040;
}
.color-btn-group {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  display: flex;
  gap: 4px;
}
.color-btn-group .gradient-btn {
  flex: 1;
  min-width: 0;
  padding: 0 8px;
  font-size: 16px;
}
.color-btn-group .sky-btn {
  background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
}
.color-btn-group .plate-btn {
  background: linear-gradient(135deg, #2b3750, #3a4a6b, #4a5a7b);
}
#palette .alpha-control {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  height: 24px;           /* sabit yükseklik */
  white-space: nowrap;    /* label ve yüzde tek satırda kalsın */
}
#palette .alpha-control input[type="range"] {
  width: 120px;
  height: 4px;            /* ince ve sabit yükseklikli bar */
}
#palette .swatch { width: 18px; height: 18px; border-radius: 4px; cursor: pointer; border: 1px solid rgba(255,255,255,0.2); }
#palette .swatch.active { outline: 2px solid var(--accent); outline-offset: 1px; }

/* Gradient button to open modal */
.gradient-btn { height: 32px; padding: 0 12px; border: none; border-radius: 8px; cursor: pointer; font-weight: 600;
  background: linear-gradient(135deg, #ff8a00, #e52e71, #4f9cff); color: white; box-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.gradient-btn:hover { filter: brightness(1.15); }

#topbar-right {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center; /* tools kapsülünü yatayda ortala */
}

#topbar-tools-wrapper {
  position: relative;
  margin-top: 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  background: rgba(10,10,10,0.9);
  padding: 8px 18px 10px;
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
}

#tools { display:flex; align-items:center; gap: 8px; flex-wrap: wrap; }

/* Dropdown for more tools on small screens */
#more-tools-dropdown {
  display: none;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0 0;   /* Üst satırın hemen altı, kapsül içinde ikinci satır gibi */
  margin-top: 4px;
  width: 100%;
  justify-content: center; /* Butonlar kapsül içinde ortalansın */
}

#more-tools-dropdown label {
  font-size: 12px;
  color: var(--muted);
}

/* Grid label + select: üst ve alt menüde aynı görünüm */
#tools label[for="grid-size"],
#more-tools-dropdown label[for="grid-size-mobile"] {
  font-size: 12px;
  color: var(--muted);
  margin-right: 4px;
}

/* Default: hide small-screen elements */
.show-on-small { display: none !important; }
.hide-on-small { display: inline-flex; }

/* XXL (>=1400px) and XL (>=1200px): Normal layout */
/* (No changes needed, default is correct) */

/* L (>=992px) and M (>=768px): Stack toolbar under palette */
@media (max-width: 1199px) {
  #topbar {
    flex-direction: column;
    align-items: flex-start;  /* palette genişlemesin */
  }
  #topbar-right {
    justify-content: center; /* kapsül her genişlikte ortada kalsın */
  }
}

/* S (>=576px) and XS (>=400px): Hide specific buttons, show dropdown toggle */
@media (max-width: 767px) {
  #topbar {
    flex-direction: column;
    align-items: flex-start;  /* palette genişlemesin */
  }
  #topbar-right {
    justify-content: center; /* küçük ekranda da kapsül ortada */
  }
  .hide-on-small { display: none !important; }
  .show-on-small { display: inline-flex !important; }
}
#tools .sep { width: 1px; height: 24px; background: #2a3040; margin: 0 4px; }
#tools select,
#more-tools-dropdown select {
  height: 32px;
  background: #111;
  color: #eee;
  border-radius: 999px;
  border: 1px solid #666;
  padding: 0 12px;
}
#tools .tool-btn,
#more-tools-dropdown .tool-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid #666;
  background: radial-gradient(circle at 30% 30%, #444, #000);
  color: #fff;
  cursor: pointer;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 6px rgba(0,0,0,0.8);
}
#tools .tool-btn:hover,
#more-tools-dropdown .tool-btn:hover {
  background: radial-gradient(circle at 30% 30%, #666, #111);
}
#tools button.toggle {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid #666;
  background: radial-gradient(circle at 30% 30%, #444, #000);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 6px rgba(0,0,0,0.8);
}
#tools button.toggle.active {
  background: radial-gradient(circle at 30% 30%, #ff5a5a, #610000);
  border-color: #ffb3b3;
  box-shadow: 0 0 0 2px rgba(255,120,120,0.7), 0 0 16px rgba(255,80,80,0.9);
}

#selection-tools {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 52px; /* tools satırının hemen altı, layout'u bozma */
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
#selection-tools .btn-group-vertical {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* My bricks (presets) */
.my-bricks-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
}
.my-bricks-grid .preset-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0;
  font-size: 10px;
  line-height: 1.1;
  min-height: 80px;
  overflow: hidden;
}
.my-bricks-grid .preset-canvas {
  width: 100%;
  height: 100%;
  border-radius: 4px;
  background: #05070b;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06);
}
.my-bricks-grid .btn.active .preset-canvas {
  box-shadow: 0 0 0 1px rgba(79,156,255,0.9), 0 0 6px rgba(79,156,255,0.8);
}

.my-bricks-grid .preset-close {
  position: absolute;
  top: 2px;
  right: 4px;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: none;
  background: rgba(0,0,0,0.4);
  color: #ccc;
  font-size: 10px;
  line-height: 1;
  padding: 0;
  cursor: pointer;
}
.my-bricks-grid .preset-close:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.my-bricks-grid .preset-label {
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  padding: 1px 4px;
  font-size: 9px;
  background: rgba(0,0,0,0.6);
  border-radius: 3px;
}

.btn.edit-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid #666;
  background: radial-gradient(circle at 30% 30%, #444, #000);
  color: #fff;
  cursor: pointer;
  font-size: 18px;
  text-align: center;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 6px rgba(0,0,0,0.8);
  transition: all 0.12s ease;
}
.btn.edit-btn:hover { background: radial-gradient(circle at 30% 30%, #666, #111); }
.btn.edit-btn.active {
  border-color: #ff4c4c;
  background: rgba(255,76,76,0.35);
  box-shadow: 0 0 0 1px rgba(255,76,76,0.6);
}
.btn.edit-btn.cancel { border-color: #ff4c4c; color: #ff9999; }
.btn.edit-btn.cancel:hover { background: rgba(255,76,76,0.1); }
.btn.edit-btn.confirm { border-color: #4caf50; color: #90ee90; }
.btn.edit-btn.confirm:hover { background: rgba(76,175,80,0.1); }
.btn.edit-btn:disabled { opacity: 0.25; cursor: not-allowed; }

#main { flex: 1; display: grid; grid-template-columns: var(--left-w) 1fr; }
#left { background: var(--panel); border-right: 1px solid #222834; }
#center { position: relative; }
#viewport { position:absolute; inset:0; }

.selection-tick {
  display:none;
  position:absolute;
  inset:auto 20px 20px auto;
  width:32px;
  height:32px;
  border-radius:50%;
  border:none;
  background:rgba(79,156,255,0.35);
  box-shadow:0 0 0 1px rgba(255,255,255,0.4);
  cursor:pointer;
}

/* Left panel: brick type section */
.left-section {
  padding: 16px 14px;
  border-bottom: 1px solid #222834;
}
.left-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 8px;
}
.btn-group {
  display: inline-flex;
  gap: 8px;
}
.btn.small {
  min-width: 50px;
  height: 50px;
  padding: 0;
  border-radius: 6px;
  border: 1px solid #2a3040;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 0 rgba(79,156,255,0);
  transition: background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease, transform 0.08s ease;
  outline: none;
}
.btn.small:hover {
  background: #252b3a;
}
.btn.small.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(79,156,255,0.9), 0 0 12px rgba(79,156,255,0.55);
  transform: translateY(-1px);
}

.btn.small:focus {
  outline: none;
}

.btn.small .icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  border-radius: 5px;
  border: none;
  background: transparent;
}

.btn.small .brick-normal {
  width: 100%;
  height: 100%;
  border-radius: 5px;
  position: relative;
  overflow: hidden;
  background: url('assets/bricks/images/11brick.png') center/contain no-repeat;
  background-color: transparent;
  border: none;
}

.btn.small .brick-thin {
  width: 100%;
  height: 100%;
  border-radius: 5px;
  position: relative;
  background: url('assets/bricks/images/11plate.png') center/contain no-repeat;
  border: none;
}

.btn.small .brick-technic {
  width: 100%;
  height: 100%;
  border-radius: 5px;
  position: relative;
  overflow: hidden;
  background: url('assets/bricks/images/teknik-brick.png') center/contain no-repeat;
  border: none;
}

.btn.small .brick-hollow {
  width: 100%;
  height: 100%;
  border-radius: 5px;
  position: relative;
  overflow: hidden;
  background: url('assets/bricks/images/wall.png') center/contain no-repeat;
  border: none;
}

/* View cube placeholder */
#viewcube-canvas { position: absolute; top: 10px; left: 10px; width: 120px; height: 120px; pointer-events: auto; background: rgba(255,255,255,0.03); border-radius: 8px; border: 1px solid #2a3040; }

/* Modal */
.modal { position: fixed; inset: 0; display: none; align-items: center; justify-content: center; background: rgba(0,0,0,0.5); z-index: 1000; }
.modal[aria-hidden="false"] { display: flex; }
.modal-content { width: 320px; background: var(--panel); border: 1px solid #2a3040; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,0.4); overflow: hidden; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; background: var(--panel-2); border-bottom: 1px solid #2a3040; }
.modal-body { padding: 16px; display: flex; align-items: center; justify-content: center; }
.modal-footer { padding: 10px 12px; display: flex; gap: 8px; justify-content: flex-end; border-top: 1px solid #2a3040; }
.icon-btn { background: transparent; border: none; color: var(--text); cursor: pointer; font-size: 16px; }
.modal-footer button { height: 32px; padding: 0 12px; border-radius: 8px; border: 1px solid #2a3040; background: var(--panel-2); color: var(--text); cursor: pointer; }
.modal-footer button:hover { filter: brightness(1.05); }

/* Save modal options */
.save-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}
.save-options button {
  width: 100%;
  height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid #2a3040;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  text-align: left;
}
.save-options button:hover {
  filter: brightness(1.05);
}

/* Selection editing tools: bar under tools inside topbar */
#selection-tools {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 4px;
  gap: 6px;
}
#selection-tools .btn-group-vertical {
  display: flex;
  flex-direction: row;
  gap: 6px;
}
.btn.edit-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid #666;
  background: radial-gradient(circle at 30% 30%, #444, #000);
  color: #fff;
  cursor: pointer;
  font-size: 18px;
  text-align: center;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 6px rgba(0,0,0,0.8);
  transition: all 0.12s ease;
}
.btn.edit-btn:hover { background: radial-gradient(circle at 30% 30%, #666, #111); }
.btn.edit-btn.active {
  border-color: #ff4c4c;
  background: rgba(255,76,76,0.35);
  box-shadow: 0 0 0 1px rgba(255,76,76,0.6);
}
.btn.edit-btn.cancel { border-color: #ff4c4c; color: #ff9999; }
.btn.edit-btn.cancel:hover { background: rgba(255,76,76,0.1); }
.btn.edit-btn.confirm { border-color: #4caf50; color: #90ee90; }
.btn.edit-btn.confirm:hover { background: rgba(76,175,80,0.1); }
.btn.edit-btn:disabled { opacity: 0.25; cursor: not-allowed; }