/* =========================================================
  AtomLab Interaktif - symbol.css
  ---------------------------------------------------------
  File ini khusus untuk Mode Simbol:
  - layout area simbol
  - atom preview di mode simbol
  - kartu editor simbol unsur
  - input nomor massa, nomor atom, dan muatan
  - tombol aksi simbol
  - state feedback simbol
  - responsive visual mode simbol
========================================================= */

/* =========================================================
  Symbol Lab Panel
========================================================= */

.symbol-lab-panel::before,
.symbol-lab-panel::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: var(--radius-full);
  z-index: 0;
}

.symbol-lab-panel::before {
  width: 420px;
  height: 420px;
  left: -160px;
  top: -120px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.16), transparent 70%);
}

.symbol-lab-panel::after {
  width: 360px;
  height: 360px;
  right: -130px;
  bottom: -140px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.15), transparent 70%);
}

.symbol-atom-area,
.symbol-editor-area {
  position: relative;
  z-index: 1;
}

.symbol-atom-area::before {
  content: "";
  position: absolute;
  inset: var(--space-4);
  border-radius: var(--radius-2xl);
  border: 1px dashed rgba(37, 99, 235, 0.22);
  pointer-events: none;
}

.symbol-atom-area::after {
  content: "Preview Atom";
  position: absolute;
  right: var(--space-5);
  bottom: var(--space-5);
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-full);
  color: var(--primary);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border-soft);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.symbol-editor-area h2 {
  color: var(--text-main);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
}

.symbol-editor-area .section-description {
  font-size: var(--text-base);
}

/* =========================================================
  Symbol Editor Card
========================================================= */

.symbol-editor-card {
  width: min(320px, 100%);
  height: 390px;
  position: relative;
  display: grid;
  place-items: center;
  margin-inline: auto;
  border: 3px solid var(--text-main);
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98)),
    var(--color-white);
  box-shadow:
    inset 0 0 0 1px rgba(15, 23, 42, 0.08),
    var(--shadow-lg);
  overflow: hidden;
}

.symbol-editor-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(15, 23, 42, 0.1);
  border-radius: var(--radius-sm);
  pointer-events: none;
}

.symbol-editor-card::after {
  content: "Simbol Atom";
  position: absolute;
  left: 50%;
  bottom: var(--space-3);
  transform: translateX(-50%);
  color: var(--text-soft);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  pointer-events: none;
}

.symbol-editor-letter {
  color: var(--text-main);
  font-size: clamp(5.8rem, 11vw, 7.6rem);
  font-weight: 950;
  line-height: 1;
  letter-spacing: -0.08em;
  transform: translateY(-8px);
}

.symbol-editor-name {
  margin-top: calc(var(--space-2) * -1);
  color: var(--accent-orange);
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  font-weight: 950;
  line-height: var(--leading-tight);
  text-align: center;
  letter-spacing: -0.04em;
}

/* =========================================================
  Symbol Number Fields
========================================================= */

.number-field {
  position: absolute;
  display: block;
  width: 92px;
  z-index: 2;
}

.number-field input {
  height: 54px;
  padding: 0.35rem 0.5rem;
  border: 2px solid var(--text-main);
  border-radius: var(--radius-md);
  color: var(--text-main);
  background: var(--color-white);
  font-size: var(--text-2xl);
  font-weight: 950;
  line-height: 1;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.number-field input:focus {
  border-color: var(--primary);
  box-shadow:
    0 0 0 4px rgba(37, 99, 235, 0.16),
    var(--shadow-sm);
}

.symbol-field-mass {
  top: var(--space-6);
  left: var(--space-5);
}

.symbol-field-charge {
  top: var(--space-6);
  right: var(--space-5);
}

.symbol-field-charge input {
  color: var(--accent-orange);
}

.symbol-field-atomic {
  left: var(--space-5);
  bottom: var(--space-10);
}

.symbol-field-atomic input {
  color: var(--accent-orange);
}

.number-field::after {
  position: absolute;
  left: 50%;
  top: calc(100% + 0.25rem);
  transform: translateX(-50%);
  color: var(--text-soft);
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.symbol-field-mass::after {
  content: "Massa";
}

.symbol-field-charge::after {
  content: "Muatan";
}

.symbol-field-atomic::after {
  content: "Atom";
}

/* =========================================================
  Symbol Actions
========================================================= */

.symbol-editor-area .action-row {
  justify-content: center;
}

.symbol-editor-area .btn {
  min-height: 48px;
  padding-inline: var(--space-5);
}

#symbolFeedback {
  max-width: 520px;
  margin-inline: auto;
}

/* =========================================================
  Symbol Periodic Table Context
========================================================= */

#symbolPeriodicTable .periodic-cell.is-active {
  background: linear-gradient(135deg, #fb923c, #fdba74);
}

#symbolPeriodicSelectedSymbol {
  box-shadow:
    inset 0 0 0 1px rgba(15, 23, 42, 0.08),
    0 10px 22px rgba(234, 88, 12, 0.14);
}

/* =========================================================
  Symbol Mode Atom Preview Adjustments
========================================================= */

#symbolAtomCanvas {
  filter: drop-shadow(0 18px 32px rgba(37, 99, 235, 0.12));
}

#symbolAtomCanvas .nucleus-particle {
  width: 42px;
  height: 42px;
}

#symbolAtomCanvas .orbit-electron {
  width: 23px;
  height: 23px;
}

/* =========================================================
  Symbol State Helpers
========================================================= */

.symbol-editor-card.is-valid {
  border-color: var(--success);
  box-shadow:
    inset 0 0 0 1px rgba(22, 163, 74, 0.16),
    0 22px 50px rgba(22, 163, 74, 0.16);
}

.symbol-editor-card.is-invalid {
  border-color: var(--danger);
  box-shadow:
    inset 0 0 0 1px rgba(220, 38, 38, 0.16),
    0 22px 50px rgba(220, 38, 38, 0.13);
}

.symbol-editor-card.is-valid::after {
  color: var(--success);
}

.symbol-editor-card.is-invalid::after {
  color: var(--danger);
}

.symbol-editor-name.is-empty {
  color: var(--text-muted);
}

/* =========================================================
  Responsive Symbol Mode
========================================================= */

@media (max-width: 1120px) {
  .symbol-editor-area {
    align-items: center;
    text-align: center;
  }

  .symbol-editor-area .section-description {
    margin-inline: auto;
  }

  .symbol-atom-area::after {
    right: 50%;
    transform: translateX(50%);
  }
}

@media (max-width: 760px) {
  .symbol-editor-card {
    width: min(300px, 100%);
    height: 360px;
  }

  .symbol-editor-letter {
    font-size: 6.2rem;
  }

  .number-field {
    width: 82px;
  }

  .number-field input {
    height: 48px;
    font-size: var(--text-xl);
  }

  .symbol-field-mass,
  .symbol-field-charge {
    top: var(--space-5);
  }

  .symbol-field-mass,
  .symbol-field-atomic {
    left: var(--space-4);
  }

  .symbol-field-charge {
    right: var(--space-4);
  }

  .symbol-field-atomic {
    bottom: var(--space-9);
  }

  .symbol-editor-area .btn {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .symbol-atom-area {
    min-height: 430px;
  }

  .symbol-atom-area::before {
    inset: var(--space-2);
  }

  .symbol-editor-card {
    width: min(280px, 100%);
    height: 330px;
  }

  .symbol-editor-letter {
    font-size: 5.4rem;
  }

  .number-field {
    width: 74px;
  }

  .number-field input {
    height: 44px;
    padding-inline: 0.35rem;
    font-size: var(--text-lg);
  }

  .number-field::after {
    font-size: 0.58rem;
  }

  .symbol-editor-card::after {
    bottom: var(--space-2);
    font-size: 0.62rem;
  }

  .symbol-field-atomic {
    bottom: var(--space-8);
  }
}