/* =========================================================
   EmojiCrypt — style.css
   Aesthetic: Retro-futuristic terminal meets soft glassmorphism
   Fonts: Syne (display) + JetBrains Mono (mono)
   ========================================================= */

/* ── Custom Properties ─────────────────────────────────── */
:root {
  /* Dark theme (default) */
  --bg: #0a0b0f;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --bg-input: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.10);
  --border-focus: rgba(138,110,255,0.7);
  --text-primary: #f0eeff;
  --text-secondary: #8a8aaa;
  --text-muted: #4a4a6a;
  --accent: #8a6eff;
  --accent-2: #ff6eb0;
  --accent-3: #6ef0e0;
  --glow: rgba(138,110,255,0.3);
  --glow-2: rgba(255,110,176,0.25);
  --encrypt-btn: linear-gradient(135deg, #8a6eff 0%, #6e4fff 100%);
  --decrypt-btn: linear-gradient(135deg, #ff6eb0 0%, #e040a0 100%);
  --success: #4fffb0;
  --error: #ff6e6e;
  --warning: #ffe76e;
  --orb-1: rgba(138,110,255,0.18);
  --orb-2: rgba(255,110,176,0.12);
  --orb-3: rgba(110,240,224,0.10);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.22s cubic-bezier(0.4,0,0.2,1);
  --shadow-card: 0 8px 40px rgba(0,0,0,0.45), 0 1px 0 rgba(255,255,255,0.06) inset;
}

[data-theme="light"] {
  --bg: #f0eef9;
  --bg-card: rgba(255,255,255,0.72);
  --bg-card-hover: rgba(255,255,255,0.88);
  --bg-input: rgba(255,255,255,0.55);
  --border: rgba(138,110,255,0.18);
  --border-focus: rgba(138,110,255,0.7);
  --text-primary: #1a1630;
  --text-secondary: #5a527a;
  --text-muted: #9a90bc;
  --glow: rgba(138,110,255,0.15);
  --glow-2: rgba(255,110,176,0.12);
  --orb-1: rgba(138,110,255,0.12);
  --orb-2: rgba(255,110,176,0.08);
  --orb-3: rgba(110,240,224,0.07);
  --shadow-card: 0 8px 40px rgba(138,110,255,0.10), 0 1px 0 rgba(255,255,255,0.9) inset;
}

/* ── Reset & Base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Syne', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  position: relative;
}

/* ── Animated Background ──────────────────────────────── */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 12s ease-in-out infinite alternate;
}

.orb-1 {
  width: 600px; height: 600px;
  top: -200px; left: -150px;
  background: var(--orb-1);
  animation-duration: 14s;
}

.orb-2 {
  width: 500px; height: 500px;
  bottom: -100px; right: -120px;
  background: var(--orb-2);
  animation-duration: 18s;
  animation-delay: -5s;
}

.orb-3 {
  width: 350px; height: 350px;
  top: 50%; left: 60%;
  background: var(--orb-3);
  animation-duration: 10s;
  animation-delay: -8s;
}

@keyframes orbFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.08); }
}

/* ── Toast Notifications ─────────────────────────────── */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-primary);
  background: var(--bg-card);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  animation: toastIn 0.35s cubic-bezier(0.34,1.56,0.64,1) forwards;
  pointer-events: auto;
  max-width: 320px;
}

.toast.success { border-color: rgba(79,255,176,0.4); }
.toast.error   { border-color: rgba(255,110,110,0.4); }
.toast.info    { border-color: rgba(138,110,255,0.4); }
.toast.warning { border-color: rgba(255,231,110,0.4); }

.toast.hide {
  animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(50px) scale(0.9); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to   { opacity: 0; transform: translateX(50px) scale(0.9); }
}

/* ── Header ──────────────────────────────────────────── */
.site-header {
  position: relative;
  z-index: 10;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10,11,15,0.4);
  transition: background var(--transition);
}

[data-theme="light"] .site-header {
  background: rgba(240,238,249,0.6);
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon { font-size: 1.5rem; }

.logo-text {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── Icon Buttons ────────────────────────────────────── */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 1.1rem;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
  color: var(--text-primary);
}

.icon-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: scale(1.08);
}

.icon-btn.small { width: 32px; height: 32px; font-size: 0.9rem; }

/* ── Main Container ──────────────────────────────────── */
.main-container {
  position: relative;
  z-index: 5;
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ── Mode Toggle ─────────────────────────────────────── */
.mode-toggle-wrapper {
  display: flex;
  gap: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 4px;
  width: fit-content;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.mode-btn {
  padding: 8px 22px;
  border-radius: var(--radius);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: 'Syne', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.mode-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--glow);
}

.mode-btn:not(.active):hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

/* ── Password Section ────────────────────────────────── */
.password-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-card);
  animation: fadeSlideIn 0.3s ease;
}

.password-section.hidden {
  display: none;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.field-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.password-input-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.text-input, .password-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.text-input:focus, .password-input:focus {
  border-color: var(--border-focus);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 3px var(--glow);
}

.hint-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

/* Strength bar */
.strength-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.strength-label {
  font-size: 0.73rem;
  color: var(--text-secondary);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.strength-bar-track {
  flex: 1;
  height: 6px;
  background: var(--bg-input);
  border-radius: 99px;
  overflow: hidden;
}

.strength-bar-fill {
  height: 100%;
  border-radius: 99px;
  width: 0%;
  transition: width 0.4s ease, background 0.4s ease;
}

.strength-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.73rem;
  min-width: 50px;
  text-align: right;
}

/* ── I/O Grid ────────────────────────────────────────── */
.io-grid {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  gap: 0;
  align-items: start;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.card:hover {
  border-color: rgba(138,110,255,0.25);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(138,110,255,0.08);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px 0;
}

.card-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.char-counter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.char-counter.warn { color: var(--warning); }
.char-counter.danger { color: var(--error); }

.output-actions-inline {
  display: flex;
  gap: 6px;
}

.textarea {
  width: 100%;
  min-height: 180px;
  padding: 14px 16px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  line-height: 1.65;
  resize: vertical;
  outline: none;
  transition: color var(--transition);
}

.textarea::placeholder { color: var(--text-muted); }

.output-display {
  min-height: 180px;
  overflow-y: auto;
  word-break: break-all;
  cursor: text;
  user-select: text;
  letter-spacing: 0.04em;
}

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

.card-actions {
  padding: 10px 16px 14px;
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--border);
}

/* Arrow column */
.arrow-col {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 60px;
}

.arrow-icon {
  font-size: 1.6rem;
  color: var(--text-muted);
  animation: arrowPulse 2.5s ease-in-out infinite;
}

@keyframes arrowPulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50%       { opacity: 0.9; transform: scale(1.15); }
}

/* ── Buttons ─────────────────────────────────────────── */
.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
  font-family: 'Syne', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.action-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.action-btn.ghost {
  background: transparent;
  border-color: transparent;
}

.action-btn.ghost:hover {
  background: var(--bg-input);
  border-color: var(--border);
}

.action-btn.secondary {
  background: transparent;
}

.action-btn.small {
  padding: 5px 10px;
  font-size: 0.75rem;
}

/* Main CTA buttons */
.action-row {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.cta-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: calc(var(--radius) + 4px);
  border: none;
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  color: #fff;
}

.cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.12);
  opacity: 0;
  transition: opacity var(--transition);
}

.cta-btn:hover::before { opacity: 1; }

.cta-btn:hover {
  transform: translateY(-3px) scale(1.02);
  filter: brightness(1.1);
}

.cta-btn:active {
  transform: translateY(0) scale(0.98);
}

.cta-btn.encrypt {
  background: var(--encrypt-btn);
  box-shadow: 0 6px 30px rgba(138,110,255,0.4);
}

.cta-btn.decrypt {
  background: var(--decrypt-btn);
  box-shadow: 0 6px 30px rgba(255,110,176,0.4);
}

.cta-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  filter: none !important;
}

.btn-icon { font-size: 1.1rem; }

/* Loader spinner inside CTA */
.btn-loader {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn-loader.hidden { display: none; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Emoji Map Details ────────────────────────────────── */
.map-details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
}

.map-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  list-style: none;
  user-select: none;
  transition: background var(--transition);
}

.map-summary::-webkit-details-marker { display: none; }
.map-summary:hover { background: var(--bg-card-hover); }

.summary-arrow {
  transition: transform var(--transition);
}

.map-details[open] .summary-arrow {
  transform: rotate(180deg);
}

.emoji-map-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 6px;
  padding: 16px;
  border-top: 1px solid var(--border);
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.map-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.map-cell:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.map-cell .cell-emoji { font-size: 1.3rem; }

.map-cell .cell-char {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── History Section ─────────────────────────────────── */
.history-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
}

.section-title {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.history-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.empty-history {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 20px 0;
}

.history-item {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: fadeSlideIn 0.25s ease;
  transition: border-color var(--transition);
}

.history-item:hover { border-color: rgba(138,110,255,0.3); }

.history-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.history-type-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 99px;
}

.badge-encrypt {
  background: rgba(138,110,255,0.18);
  color: var(--accent);
}

.badge-decrypt {
  background: rgba(255,110,176,0.18);
  color: var(--accent-2);
}

.history-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.history-preview {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item-actions {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

/* ── Footer ──────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 5;
  text-align: center;
  padding: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ── Scrollbar ───────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Selection ───────────────────────────────────────── */
::selection {
  background: rgba(138,110,255,0.35);
  color: var(--text-primary);
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 720px) {
  .site-header { padding: 14px 16px; }

  .main-container { padding: 24px 14px 60px; gap: 20px; }

  .io-grid {
    grid-template-columns: 1fr;
  }

  .arrow-col {
    padding-top: 0;
    transform: rotate(90deg);
    height: 32px;
  }

  .action-row {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-btn {
    justify-content: center;
    padding: 13px 20px;
  }

  .mode-toggle-wrapper { width: 100%; justify-content: center; }

  .emoji-map-grid {
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  }

  #toast-container { right: 10px; left: 10px; }
  .toast { max-width: 100%; }
}

@media (max-width: 440px) {
  .logo-text { font-size: 1.1rem; }
  .cta-btn { font-size: 0.9rem; }
}

/* ── Utility ─────────────────────────────────────────── */
.hidden { display: none !important; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}