/* ==========================
   DESIGN SYSTEM — STYLE.CSS
   Investing Simulator
========================== */

/* ---- GOOGLE FONTS (already loaded via HTML) ---- */

/* ---- CSS VARIABLES ---- */
:root {
  --bg-base:       #060b12;
  --bg-surface:    #0a1120;
  --bg-card:       #0f1d2e;
  --bg-card-hover: #142236;

  --neon-blue:     #00d4ff;
  --neon-green:    #00ff9f;
  --neon-purple:   #a855f7;
  --neon-gold:     #ffd700;

  --gain:   #00ff9f;
  --loss:   #ff4d6d;
  --neutral:#7a8fa6;

  --text-primary:   #eef2ff;
  --text-secondary: #7a8fa6;
  --text-muted:     #3a4f66;

  --glow-blue:  0 0 24px rgba(0,212,255,0.35);
  --glow-green: 0 0 24px rgba(0,255,159,0.35);
  --glow-gold:  0 0 24px rgba(255,215,0,0.3);

  --border:       rgba(0,212,255,0.12);
  --border-hover: rgba(0,212,255,0.35);

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-pill: 999px;

  --transition-fast: 0.18s ease;
  --transition-med:  0.38s ease;
  --transition-slow: 0.75s cubic-bezier(0.16,1,0.3,1);

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* ---- PARTICLE CANVAS ---- */
#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ---- SCANLINES ---- */
.scanlines::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ---- SCREENS ---- */
.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease;
  overflow: hidden;
}

.screen.active {
  opacity: 1;
  pointer-events: all;
}

/* ---- GLASS CARD ---- */
.glass-card {
  background: rgba(10,17,32,0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color var(--transition-med), box-shadow var(--transition-med);
}

.glass-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--glow-blue);
}

/* ---- TYPOGRAPHY ---- */
h1, h2, h3 { font-family: 'Space Grotesk', sans-serif; line-height: 1.1; }

.neon-text {
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 16px rgba(0,212,255,0.5));
}

.neon-text-green {
  background: linear-gradient(135deg, var(--neon-green), #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 16px rgba(0,255,159,0.5));
}

.text-gain  { color: var(--gain); }
.text-loss  { color: var(--loss); }
.text-neutral { color: var(--text-secondary); }

/* ---- BUTTONS ---- */
.btn-primary {
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-green));
  color: #000;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius-pill);
  padding: 13px 32px;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(0,212,255,0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 32px rgba(0,212,255,0.55);
}
.btn-primary:active { transform: scale(0.97); }

.btn-primary:disabled,
.btn-primary.is-disabled {
  opacity: 0.45;
  cursor: pointer;
  transform: none;
  box-shadow: none;
  filter: grayscale(0.35);
}

.btn-primary:disabled:hover,
.btn-primary.is-disabled:hover {
  transform: none;
  box-shadow: 0 0 18px rgba(255,77,109,0.2);
}

.btn-lg { font-size: 1.1rem; padding: 16px 40px; }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 10px 24px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}
.btn-ghost:hover {
  color: var(--neon-blue);
  border-color: var(--neon-blue);
  background: rgba(0,212,255,0.06);
}

.w-full { width: 100%; }

/* ---- FORM ---- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: var(--space-lg);
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-group input {
  background: rgba(0,212,255,0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  padding: 13px 16px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus {
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.12);
}

.form-group input.invalid {
  border-color: var(--loss);
  box-shadow: 0 0 0 3px rgba(255,77,109,0.16), 0 0 18px rgba(255,77,109,0.32);
}

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

.field-hint {
  min-height: 16px;
  color: var(--loss);
  font-size: 0.78rem;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.field-hint.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- TOAST ---- */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: rgba(10,17,32,0.95);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 0.9rem;
  color: var(--text-primary);
  backdrop-filter: blur(12px);
  animation: toast-in 0.35s ease, toast-out 0.35s ease 2.65s forwards;
  pointer-events: all;
  max-width: 300px;
}

.toast.success { border-color: var(--gain); }
.toast.error   { border-color: var(--loss); }
.toast.info    { border-color: var(--neon-blue); }
.toast.news    { border-color: var(--neon-gold); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(30px); }
}

/* ---- MODAL ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 5000;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  transition: opacity var(--transition-med);
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal {
  width: 100%;
  max-width: 460px;
  padding: var(--space-xl);
  position: relative;
  animation: modal-in 0.35s cubic-bezier(0.16,1,0.3,1);
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.92) translateY(20px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255,255,255,0.08);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.modal-close:hover { background: var(--loss); color: #fff; }

/* ---- LEADERBOARD TABLE ---- */
.lb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.lb-table th, .lb-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.lb-table th { color: var(--text-secondary); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; }
.lb-table tr:hover td { background: rgba(0,212,255,0.04); }
.lb-table .rank-1 td { color: var(--neon-gold); }
.lb-table .rank-2 td { color: #c0c0c0; }
.lb-table .rank-3 td { color: #cd7f32; }

/* ---- MENU SCREEN ---- */
#screen-menu {
  align-items: center;
  justify-content: center;
  overflow-y: auto;
  padding: var(--space-xl) var(--space-md);
}

.menu-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  width: 100%;
  max-width: 480px;
}

.menu-logo {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  background:
    radial-gradient(circle at 32% 24%, rgba(255,255,255,0.2), transparent 22%),
    linear-gradient(135deg, rgba(0,212,255,0.18), rgba(0,255,159,0.08));
  border: 1px solid rgba(0,212,255,0.3);
  box-shadow: inset 0 0 18px rgba(0,212,255,0.1), 0 0 28px rgba(0,212,255,0.22);
  overflow: hidden;
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: inherit;
}

.brand-mark-lg {
  width: 78px;
  height: 78px;
  border-radius: 22px;
  margin-bottom: var(--space-xs);
}

.brand-mark-sm {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex-shrink: 0;
}

.brand-bar {
  position: relative;
  z-index: 1;
  width: 10%;
  min-width: 4px;
  border-radius: 999px 999px 2px 2px;
  background: linear-gradient(180deg, var(--neon-green), var(--neon-blue));
  box-shadow: 0 0 12px rgba(0,255,159,0.34);
}

.brand-mark-lg .brand-bar-1 { height: 25%; }
.brand-mark-lg .brand-bar-2 { height: 43%; }
.brand-mark-lg .brand-bar-3 { height: 62%; }
.brand-mark-sm .brand-bar-1 { height: 24%; }
.brand-mark-sm .brand-bar-2 { height: 42%; }
.brand-mark-sm .brand-bar-3 { height: 60%; }

.brand-arrow {
  position: absolute;
  z-index: 2;
  width: 45%;
  height: 28%;
  right: 18%;
  top: 22%;
  border-top: 3px solid var(--neon-green);
  border-right: 3px solid var(--neon-green);
  transform: rotate(18deg) skewX(-12deg);
  filter: drop-shadow(0 0 8px rgba(0,255,159,0.5));
}

.brand-arrow::after {
  content: '';
  position: absolute;
  right: -5px;
  top: -7px;
  width: 8px;
  height: 8px;
  border-top: 3px solid var(--neon-green);
  border-right: 3px solid var(--neon-green);
  transform: rotate(12deg);
}

.menu-title {
  font-size: 2.75rem;
  max-width: 100%;
  background: linear-gradient(135deg, var(--text-primary), var(--neon-blue) 48%, var(--neon-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 18px rgba(0,212,255,0.28));
  overflow-wrap: anywhere;
}
.menu-sub { color: var(--text-secondary); margin-top: var(--space-sm); font-size: 0.95rem; }

.menu-card { padding: var(--space-xl); width: 100%; }
.menu-card h2 { margin-bottom: var(--space-lg); font-size: 1.4rem; }

.difficulty-options {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.diff-btn {
  flex: 1;
  min-width: 100px;
  padding: 10px 8px;
  background: rgba(0,212,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
  font-family: 'Inter', sans-serif;
}
.diff-btn:hover, .diff-btn.active {
  border-color: var(--neon-blue);
  color: var(--neon-blue);
  background: rgba(0,212,255,0.08);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 640px) {
  .screen {
    transition-duration: 0.28s;
  }

  #screen-menu {
    justify-content: flex-start;
    padding: var(--space-lg) var(--space-md);
  }

  .menu-container {
    gap: var(--space-lg);
    max-width: 100%;
  }

  .brand-mark-lg {
    width: 64px;
    height: 64px;
    border-radius: 18px;
  }

  .menu-title {
    font-size: 1.8rem;
    line-height: 1.08;
  }

  .menu-sub {
    font-size: 0.9rem;
    line-height: 1.45;
    width: 100%;
    max-width: 310px;
    overflow-wrap: anywhere;
    white-space: normal;
  }

  .menu-card {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }

  .difficulty-options {
    flex-direction: column;
  }

  .diff-btn {
    width: 100%;
    min-height: 42px;
  }

  .menu-actions {
    width: 100%;
    flex-direction: column;
  }

  .menu-actions .btn-ghost {
    width: 100%;
  }

  .btn-lg {
    font-size: 1rem;
    padding: 14px 22px;
  }

  .modal-overlay {
    align-items: flex-start;
    overflow-y: auto;
    padding: var(--space-md);
  }

  .modal {
    max-width: 100%;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }

  #toast-container {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }

  .toast {
    max-width: none;
    width: 100%;
  }

  .lb-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .lb-table th,
  .lb-table td {
    padding: 9px 10px;
  }
}

@media (max-width: 380px) {
  .menu-title {
    font-size: 1.7rem;
  }

  .menu-card {
    padding: var(--space-md);
  }
}

/* ---- SCROLLBARS ---- */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--neon-blue); }

/* ---- UTILITY ANIMATIONS ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-glow {
  0%,100% { box-shadow: var(--glow-blue); }
  50%      { box-shadow: 0 0 40px rgba(0,212,255,0.6); }
}

@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}