/* ═══════════════════════════════════════════════════════
   soroban.css — Virtual Abacus Practice Styles
   ═══════════════════════════════════════════════════════ */

/* Outer container to hold abacus and helper bubble */
.abacus-outer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 1.5rem auto;
  max-width: 100%;
  padding: 0 10px;
}

/* Abacus Frame outer box */
.abacus-frame {
  position: relative;
  background: linear-gradient(135deg, #4e3629, #2b1d16);
  border: 12px solid #3d2a20;
  border-radius: 12px;
  box-shadow: 
    0 10px 25px rgba(0, 0, 0, 0.3),
    inset 0 2px 5px rgba(255, 255, 255, 0.15),
    inset 0 -2px 5px rgba(0, 0, 0, 0.4);
  width: 100%;
  max-width: 420px;
  height: 250px;
  display: flex;
  justify-content: space-around;
  box-sizing: border-box;
  padding: 0 10px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

/* Horizontal Beam (divides upper and lower decks) */
.abacus-beam {
  position: absolute;
  left: 0;
  right: 0;
  top: 70px; /* Upper deck is 70px high */
  height: 12px;
  background: linear-gradient(to bottom, #1e1e1e, #0e0e0e);
  box-shadow: 
    0 1px 3px rgba(0,0,0,0.5),
    0 -1px 3px rgba(255,255,255,0.1);
  z-index: 10;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

/* Alignment Dots (Keta-sen) on the Beam */
.abacus-beam::before {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  background-color: #fff;
  border-radius: 50%;
  box-shadow: 0 0 3px rgba(255, 255, 255, 0.8);
  /* Place at center of the beam */
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.85;
}

/* Individual Rod Container */
.rod {
  position: relative;
  width: 60px;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* The vertical metal rod */
.rod::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  transform: translateX(-50%);
  background: linear-gradient(to right, #ccc, #fff, #999);
  box-shadow: inset 1px 0 1px rgba(0,0,0,0.2);
  z-index: 1;
}

/* Bead Common Styles */
.bead {
  position: absolute;
  width: 50px;
  height: 20px;
  background: radial-gradient(circle at 50% 25%, #ffb84d 0%, #ff8a00 80%);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  z-index: 2;
  cursor: pointer;
  transition: transform 0.18s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.18s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.25);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Active glowing bead style */
.bead.active {
  background: radial-gradient(circle at 50% 25%, #ffd166 0%, #ff6b6b 80%);
  filter: drop-shadow(0 0 5px rgba(255, 107, 107, 0.8));
  z-index: 3;
}

/* 5-Bead (Upper Deck) */
.bead-5 {
  top: 6px;
  transform: translateY(0);
}
/* Active 5-Bead slides down to touch beam */
.bead-5.active {
  transform: translateY(40px);
}

/* 1-Beads (Lower Deck) */
/* The base top positions inside lower deck (starts below the beam, at top: 86px) */
.bead-1 { top: 92px; }
.bead-2 { top: 112px; }
.bead-3 { top: 132px; }
.bead-4 { top: 152px; }

/* Declarative translation offsets for lower deck 1-beads */
/* Depending on data-count of the rod (0 to 4), we apply translation */

/* Rod Count 0: All 4 beads are down (inactive) */
.rod[data-count="0"] .bead-1 { transform: translateY(40px); }
.rod[data-count="0"] .bead-2 { transform: translateY(40px); }
.rod[data-count="0"] .bead-3 { transform: translateY(40px); }
.rod[data-count="0"] .bead-4 { transform: translateY(40px); }

/* Rod Count 1: Bead-1 is UP. Beads 2,3,4 are down */
.rod[data-count="1"] .bead-1 { transform: translateY(0px); }
.rod[data-count="1"] .bead-2 { transform: translateY(40px); }
.rod[data-count="1"] .bead-3 { transform: translateY(40px); }
.rod[data-count="1"] .bead-4 { transform: translateY(40px); }

/* Rod Count 2: Bead-1,2 are UP. Beads 3,4 are down */
.rod[data-count="2"] .bead-1 { transform: translateY(0px); }
.rod[data-count="2"] .bead-2 { transform: translateY(0px); }
.rod[data-count="2"] .bead-3 { transform: translateY(40px); }
.rod[data-count="2"] .bead-4 { transform: translateY(40px); }

/* Rod Count 3: Bead-1,2,3 are UP. Bead-4 is down */
.rod[data-count="3"] .bead-1 { transform: translateY(0px); }
.rod[data-count="3"] .bead-2 { transform: translateY(0px); }
.rod[data-count="3"] .bead-3 { transform: translateY(0px); }
.rod[data-count="3"] .bead-4 { transform: translateY(40px); }

/* Rod Count 4: All 4 beads are UP */
.rod[data-count="4"] .bead-1 { transform: translateY(0px); }
.rod[data-count="4"] .bead-2 { transform: translateY(0px); }
.rod[data-count="4"] .bead-3 { transform: translateY(0px); }
.rod[data-count="4"] .bead-4 { transform: translateY(0px); }


/* Abacus Value Helper (bubbles below abacus showing digits) */
.abacus-value-helper {
  display: flex;
  justify-content: space-around;
  width: 100%;
  max-width: 420px;
  padding: 0 10px;
  box-sizing: border-box;
  margin-top: 8px;
}

.rod-value-bubble {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #f1f3f5;
  border: 2px solid #dee2e6;
  color: #495057;
  font-weight: bold;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.rod-value-bubble.active {
  background: #ffe3e3;
  border-color: #ff6b6b;
  color: #ff6b6b;
  transform: scale(1.1);
  box-shadow: 0 2px 6px rgba(255, 107, 107, 0.2);
}


/* Make Mode Target Display */
.soroban-task-box {
  background: #fff;
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-bottom: 1rem;
  border: 1px solid #e9ecef;
}

.soroban-task-title {
  font-size: 1rem;
  color: #6c757d;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.soroban-task-number {
  font-size: 3.5rem;
  font-weight: bold;
  color: #ff8a00;
  line-height: 1;
}

.soroban-instruction {
  text-align: center;
  font-size: 1.1rem;
  font-weight: bold;
  color: #495057;
  margin-bottom: 1rem;
}

/* Button to submit abacus state */
.btn-submit-abacus {
  background: linear-gradient(135deg, #ff8a00, #ff6b6b);
  color: #fff;
  border: none;
  padding: 12px 36px;
  font-size: 1.25rem;
  font-weight: bold;
  border-radius: 30px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
  transition: all 0.2s ease;
}

.btn-submit-abacus:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.45);
}

.btn-submit-abacus:active {
  transform: translateY(0);
}

.make-hint {
  font-size: 0.9rem;
  color: #868e96;
  margin-top: 8px;
}

.soroban-title {
  text-align: center;
  color: #ff8a00;
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

/* Responsive adjustment for small screens */
@media (max-width: 480px) {
  .abacus-frame {
    height: 210px;
    border-width: 8px;
  }
  
  .abacus-beam {
    top: 56px;
    height: 10px;
  }
  
  .bead {
    width: 40px;
    height: 16px;
  }
  
  .bead-5 {
    top: 5px;
  }
  .bead-5.active {
    transform: translateY(30px);
  }
  
  .bead-1 { top: 72px; }
  .bead-2 { top: 88px; }
  .bead-3 { top: 104px; }
  .bead-4 { top: 120px; }
  
  .rod[data-count="0"] .bead-1 { transform: translateY(32px); }
  .rod[data-count="0"] .bead-2 { transform: translateY(32px); }
  .rod[data-count="0"] .bead-3 { transform: translateY(32px); }
  .rod[data-count="0"] .bead-4 { transform: translateY(32px); }

  .rod[data-count="1"] .bead-1 { transform: translateY(0px); }
  .rod[data-count="1"] .bead-2 { transform: translateY(32px); }
  .rod[data-count="1"] .bead-3 { transform: translateY(32px); }
  .rod[data-count="1"] .bead-4 { transform: translateY(32px); }

  .rod[data-count="2"] .bead-1 { transform: translateY(0px); }
  .rod[data-count="2"] .bead-2 { transform: translateY(0px); }
  .rod[data-count="2"] .bead-3 { transform: translateY(32px); }
  .rod[data-count="2"] .bead-4 { transform: translateY(32px); }

  .rod[data-count="3"] .bead-1 { transform: translateY(0px); }
  .rod[data-count="3"] .bead-2 { transform: translateY(0px); }
  .rod[data-count="3"] .bead-3 { transform: translateY(0px); }
  .rod[data-count="3"] .bead-4 { transform: translateY(32px); }

  .rod[data-count="4"] .bead-1 { transform: translateY(0px); }
  .rod[data-count="4"] .bead-2 { transform: translateY(0px); }
  .rod[data-count="4"] .bead-3 { transform: translateY(0px); }
  .rod[data-count="4"] .bead-4 { transform: translateY(0px); }
  
  .rod-value-bubble {
    width: 26px;
    height: 26px;
    font-size: 0.9rem;
  }
}