/* ============================================================
   CSS RESET & VARIABEL TEMA
============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-base:        #0a0c14;
  --bg-surface:     #10131f;
  --bg-glass:       rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.07);
  --border-glass:   rgba(255, 255, 255, 0.09);

  --accent-start:   #4f8ef7;
  --accent-end:     #a855f7;
  --accent-glow:    rgba(79, 142, 247, 0.35);
  --accent-glow-lg: rgba(79, 142, 247, 0.18);

  --text-primary:   #e8eaf6;
  --text-secondary: #8892b0;
  --text-muted:     #4a5568;

  --color-success:  #34d399;
  --color-warning:  #fbbf24;
  --color-error:    #f87171;

  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-lg:  22px;
  --radius-xl:  30px;
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.4);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.5);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.6);
}

/* ============================================================
   BASE LAYOUT
============================================================ */
html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 0 env(safe-area-inset-bottom, 24px);
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(79,142,247,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(168,85,247,0.10) 0%, transparent 60%);
}

/* ============================================================
   WRAPPER UTAMA
============================================================ */
.app-wrapper {
  width: 100%;
  max-width: 520px;
  padding: 0 16px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ============================================================
   HEADER
============================================================ */
.app-header {
  padding: 36px 0 8px;
  text-align: center;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-start);
  margin-bottom: 14px;
}

.header-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-start);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

.app-title {
  font-size: clamp(26px, 7vw, 34px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-start) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-subtitle {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ============================================================
   GLASS CARD
============================================================ */
.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 20px;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.06);
  transition: border-color 0.3s ease;
}

.glass-card:focus-within {
  border-color: rgba(79, 142, 247, 0.35);
}

/* ============================================================
   TEXTAREA INPUT
============================================================ */
.input-section .section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.input-section .section-label svg {
  opacity: 0.7;
}

#text-input {
  width: 100%;
  min-height: 140px;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.7;
  caret-color: var(--accent-start);
  scrollbar-width: thin;
  scrollbar-color: var(--border-glass) transparent;
}

#text-input::placeholder {
  color: var(--text-muted);
}

#text-input::-webkit-scrollbar { width: 4px; }
#text-input::-webkit-scrollbar-track { background: transparent; }
#text-input::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 4px; }

.error-msg {
  margin-top: 10px;
  font-size: 12px;
  color: var(--color-error);
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.error-msg.visible {
  opacity: 1;
  transform: translateY(0);
}

.glass-card.error-state {
  border-color: rgba(248, 113, 113, 0.45) !important;
}

/* ============================================================
   OUTPUT MORSE
============================================================ */
.output-section .section-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.output-section .section-label-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* Tombol Copy */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.copy-btn:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(79,142,247,0.35);
  color: var(--accent-start);
}

.copy-btn.copied {
  border-color: rgba(52, 211, 153, 0.4);
  color: var(--color-success);
  background: rgba(52, 211, 153, 0.08);
}

.copy-btn svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

#morse-output {
  font-family: 'Courier New', 'Courier', monospace;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-start);
  letter-spacing: 0.12em;
  line-height: 2;
  word-break: break-word;
  min-height: 48px;
}

#morse-output.empty {
  color: var(--text-muted);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
}

.morse-char {
  display: inline-block;
  transition: color 0.08s ease, text-shadow 0.08s ease;
}

.morse-char.active {
  color: #fff;
  text-shadow: 0 0 12px var(--accent-start), 0 0 24px var(--accent-start);
}

/* ============================================================
   VISUALIZER – Canvas-based real audio waveform
============================================================ */
.visualizer-section {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  overflow: hidden;
  padding: 0 4px;
}

#vis-canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: var(--radius-md);
  opacity: 0.3;
  transition: opacity 0.4s ease;
}

.visualizer-section.playing #vis-canvas {
  opacity: 1;
}

/* ============================================================
   KONTROL: LOOP + SPEED + PLAY/STOP
============================================================ */
.controls-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.control-label-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.control-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.control-desc {
  font-size: 11px;
  color: var(--text-muted);
}

/* ---- TOGGLE SWITCH ---- */
.toggle-wrapper {
  position: relative;
  width: 52px;
  height: 30px;
  flex-shrink: 0;
}

.toggle-wrapper input[type="checkbox"] {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-track {
  position: absolute;
  inset: 0;
  border-radius: 100px;
  background: rgba(255,255,255,0.1);
  border: 1px solid var(--border-glass);
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.3s ease;
  pointer-events: none;
}

.toggle-wrapper input:checked ~ .toggle-track {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-color: transparent;
  box-shadow: 0 0 16px var(--accent-glow);
}

.toggle-wrapper input:checked ~ .toggle-track .toggle-thumb {
  transform: translateX(22px);
}

/* ---- SLIDER KECEPATAN ---- */
.speed-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.speed-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

#speed-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  border-radius: 4px;
  background: rgba(255,255,255,0.1);
  outline: none;
  cursor: pointer;
}

#speed-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  box-shadow: 0 0 8px var(--accent-glow);
  cursor: pointer;
  transition: transform 0.15s ease;
}

#speed-slider::-webkit-slider-thumb:active {
  transform: scale(1.25);
}

#speed-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border: none;
  cursor: pointer;
}

#speed-value {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-start);
  min-width: 28px;
  text-align: right;
}

/* ---- TOMBOL PLAY / STOP ---- */
#play-stop-btn {
  width: 100%;
  height: 58px;
  border: none;
  border-radius: var(--radius-xl);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.3s ease;
  background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
  color: #fff;
  box-shadow: 0 6px 24px var(--accent-glow), 0 2px 8px rgba(0,0,0,0.3);
}

#play-stop-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.15) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

#play-stop-btn:hover::before {
  transform: translateX(100%);
}

#play-stop-btn:active {
  transform: scale(0.97);
}

#play-stop-btn.stop-mode {
  background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
  box-shadow: 0 6px 24px rgba(248, 113, 113, 0.35), 0 2px 8px rgba(0,0,0,0.3);
}

#play-stop-btn svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

/* ============================================================
   KAMUS MORSE
============================================================ */
.dict-toggle-btn {
  width: 100%;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.dict-toggle-btn:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(255,255,255,0.14);
}

.dict-toggle-btn .chevron {
  transition: transform 0.3s ease;
}

.dict-toggle-btn.open .chevron {
  transform: rotate(180deg);
}

.dict-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dict-panel.open {
  max-height: 600px;
}

.dict-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 8px;
  padding: 14px 0 4px;
}

.dict-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 8px 6px;
  text-align: center;
}

.dict-char {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.dict-code {
  font-size: 11px;
  color: var(--accent-start);
  font-family: 'Courier New', monospace;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

/* ============================================================
   FOOTER (KingSyah standard)
============================================================ */
.footer {
  text-align: center;
  padding: 24px 16px 16px;
  margin-top: 8px;
}

.footer-inner {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 40px;
  backdrop-filter: blur(8px);
}

.footer-icon {
  font-size: 1rem;
  animation: footer-bob 3s ease-in-out infinite;
}

.footer-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end), var(--accent-start));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}

@keyframes footer-bob {
  0%, 100% { transform: translateY(0) rotate(-5deg); }
  50%       { transform: translateY(-2px) rotate(5deg); }
}

@keyframes shimmer {
  0%   { background-position: 0% center; }
  100% { background-position: 200% center; }
}

/* ============================================================
   ANIMASI MASUK
============================================================ */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.app-header     { animation: fadeSlideUp 0.5s ease 0.0s both; }
.input-section  { animation: fadeSlideUp 0.5s ease 0.1s both; }
.output-section { animation: fadeSlideUp 0.5s ease 0.2s both; }
.controls-card  { animation: fadeSlideUp 0.5s ease 0.3s both; }
.dict-section   { animation: fadeSlideUp 0.5s ease 0.4s both; }
.footer         { animation: fadeSlideUp 0.5s ease 0.5s both; }

/* ============================================================
   RESPONSIF DESKTOP
============================================================ */
@media (min-width: 520px) {
  .app-wrapper {
    padding: 0 0 40px;
  }
}