/* ===========================================================
   SpecZap AI — Persona 5 Design System
   persona.css: CSS Variables, Fonts, Base, Animations
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Outfit:wght@300;400;500;600;700;900&family=Noto+Sans+Thai:wght@300;400;500;700&family=Share+Tech+Mono&display=swap');

/* ── Root Variables ── */
:root {
  /* Colors */
  --p-black:       #080808;
  --p-black-2:     #0f0f0f;
  --p-card:        #141414;
  --p-card-2:      #1c1c1c;
  --p-border:      #2a2a2a;
  --p-red:         #e63946;
  --p-red-dark:    #b02030;
  --p-red-glow:    rgba(230, 57, 70, 0.25);
  --p-red-subtle:  rgba(230, 57, 70, 0.08);
  --p-gold:        #f5c842;
  --p-gold-glow:   rgba(245, 200, 66, 0.2);
  --p-white:       #f0ede8;
  --p-gray:        #888888;
  --p-gray-light:  #b0b0b0;
  --p-green:       #4ade80;
  --p-blue:        #60a5fa;

  /* Gradients */
  --p-gradient-bg:   linear-gradient(135deg, #080808 0%, #0f0f18 100%);
  --p-gradient-red:  linear-gradient(135deg, var(--p-red-dark), var(--p-red));
  --p-gradient-card: linear-gradient(145deg, #1c1c1c, #141414);

  /* Typography */
  --font-display: 'Bebas Neue', 'Black Han Sans', cursive;
  --font-body:    'Outfit', 'Noto Sans Thai', sans-serif;
  --font-mono:    'Share Tech Mono', monospace;

  /* Spacing */
  --sp-xs:  4px;
  --sp-sm:  8px;
  --sp-md:  16px;
  --sp-lg:  24px;
  --sp-xl:  40px;
  --sp-2xl: 64px;

  /* Border Radius */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;

  /* Shadows */
  --shadow-red:  0 0 30px rgba(230, 57, 70, 0.15), 0 4px 20px rgba(0,0,0,0.5);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-gold: 0 0 20px rgba(245, 200, 66, 0.2);

  /* Transitions */
  --t-fast:   0.15s ease;
  --t-base:   0.25s ease;
  --t-slow:   0.4s ease;

  /* Diagonal angle (Persona motif) */
  --skew: -3deg;
}

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

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

body {
  background: var(--p-black);
  color: var(--p-white);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse at top left, rgba(230,57,70,0.04) 0%, transparent 60%),
    radial-gradient(ellipse at bottom right, rgba(230,57,70,0.03) 0%, transparent 60%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; font-family: var(--font-body); }
input, textarea { font-family: var(--font-body); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--p-black-2); }
::-webkit-scrollbar-thumb { background: var(--p-red-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--p-red); }

/* ── Typography Utilities ── */
.font-display   { font-family: var(--font-display); }
.font-mono      { font-family: var(--font-mono); }
.text-red       { color: var(--p-red); }
.text-gold      { color: var(--p-gold); }
.text-gray      { color: var(--p-gray); }
.text-white     { color: var(--p-white); }
.text-sm        { font-size: 0.85rem; }
.text-xs        { font-size: 0.75rem; }
.text-lg        { font-size: 1.125rem; }
.text-center    { text-align: center; }
.fw-bold        { font-weight: 700; }
.fw-black       { font-weight: 900; }

/* ── Layout Utilities ── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm      { gap: var(--sp-sm); }
.gap-md      { gap: var(--sp-md); }
.gap-lg      { gap: var(--sp-lg); }
.gap-xl      { gap: var(--sp-xl); }
.w-full      { width: 100%; }
.relative    { position: relative; }
.overflow-hidden { overflow: hidden; }

/* ── Persona Diagonal Card ── */
.p-card {
  background: var(--p-gradient-card);
  border: 1px solid var(--p-border);
  border-radius: var(--r-md);
  padding: var(--sp-lg);
  position: relative;
  overflow: hidden;
}
.p-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--p-gradient-red);
}

.p-card-hover {
  transition: border-color var(--t-base), box-shadow var(--t-base), transform var(--t-fast);
}
.p-card-hover:hover {
  border-color: var(--p-red-dark);
  box-shadow: var(--shadow-red);
  transform: translateY(-2px);
}

/* ── Persona Button (Diagonal) ── */
.p-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 2px;
  padding: 14px 40px;
  background: var(--p-gradient-red);
  color: white;
  border: none;
  position: relative;
  transition: all var(--t-base);
  clip-path: polygon(12px 0%, 100% 0%, calc(100% - 12px) 100%, 0% 100%);
  text-transform: uppercase;
}
.p-btn:hover {
  background: linear-gradient(135deg, var(--p-red), #ff4d5e);
  box-shadow: 0 0 40px rgba(230, 57, 70, 0.4), 0 8px 30px rgba(0,0,0,0.5);
  transform: translateY(-2px) scale(1.02);
}
.p-btn:active { transform: translateY(0) scale(0.99); }

.p-btn-outline {
  background: transparent;
  border: 1.5px solid var(--p-red);
  color: var(--p-red);
  padding: 10px 28px;
  font-family: var(--font-display);
  letter-spacing: 1.5px;
  font-size: 0.9rem;
  transition: all var(--t-base);
  clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
}
.p-btn-outline:hover {
  background: var(--p-red-subtle);
  box-shadow: 0 0 20px var(--p-red-glow);
}

/* ── Badge / Chip ── */
.p-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--p-border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--p-gray-light);
  background: var(--p-card);
  cursor: pointer;
  transition: all var(--t-fast);
  user-select: none;
}
.p-chip:hover {
  border-color: var(--p-red);
  color: var(--p-white);
  background: var(--p-red-subtle);
}
.p-chip.active {
  border-color: var(--p-red);
  color: var(--p-red);
  background: var(--p-red-subtle);
  font-weight: 600;
}

/* ── Input Field ── */
.p-input {
  width: 100%;
  background: var(--p-black-2);
  border: 1.5px solid var(--p-border);
  color: var(--p-white);
  padding: 14px 18px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--t-base), box-shadow var(--t-base);
  border-radius: var(--r-sm);
  font-family: var(--font-body);
}
.p-input::placeholder { color: var(--p-gray); }
.p-input:focus {
  border-color: var(--p-red);
  box-shadow: 0 0 0 3px var(--p-red-glow);
}
.p-input.valid { border-color: var(--p-green); }
.p-input.invalid { border-color: #f87171; }

/* ── Red Accent Line (left border) ── */
.p-accent-left {
  border-left: 3px solid var(--p-red);
  padding-left: var(--sp-md);
}

/* ── Divider ── */
.p-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--p-border), transparent);
  margin: var(--sp-lg) 0;
}

/* ── Tag / Label ── */
.p-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: var(--p-red-subtle);
  color: var(--p-red);
  border: 1px solid var(--p-red);
  clip-path: polygon(4px 0%, 100% 0%, calc(100% - 4px) 100%, 0% 100%);
}

/* ── ANIMATIONS ── */

/* Glitch text effect */
@keyframes glitch {
  0%, 100% { text-shadow: none; transform: translate(0); }
  10%  { text-shadow: -2px 0 var(--p-red); transform: translate(-1px, 0); }
  20%  { text-shadow: 2px 0 cyan; transform: translate(1px, 0); }
  30%  { text-shadow: none; transform: translate(0); }
  40%  { text-shadow: -1px 0 var(--p-red); transform: translate(-1px, 1px); }
  50%  { text-shadow: 1px 0 cyan; transform: translate(1px, -1px); }
  60%  { text-shadow: none; transform: translate(0); }
}

.glitch {
  animation: glitch 4s infinite;
  animation-delay: 2s;
}

/* Pulse ring */
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 var(--p-red-glow); }
  70%  { box-shadow: 0 0 0 12px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.pulse { animation: pulse-ring 2s infinite; }

/* Scan line effect */
@keyframes scanline {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}
.scanlines::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: rgba(230, 57, 70, 0.12);
  animation: scanline 5s linear infinite;
  pointer-events: none;
  z-index: 9999;
}

/* Fade in up */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.5s ease forwards; }
.fade-in-up-1 { animation: fadeInUp 0.5s 0.1s ease both; }
.fade-in-up-2 { animation: fadeInUp 0.5s 0.2s ease both; }
.fade-in-up-3 { animation: fadeInUp 0.5s 0.3s ease both; }
.fade-in-up-4 { animation: fadeInUp 0.5s 0.4s ease both; }
.fade-in-up-5 { animation: fadeInUp 0.5s 0.5s ease both; }

/* Shimmer loading */
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
.shimmer {
  background: linear-gradient(90deg, var(--p-card) 25%, var(--p-card-2) 50%, var(--p-card) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite;
}

/* Float */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
.float { animation: float 3s ease-in-out infinite; }

/* Spin */
@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin 1s linear infinite; }

/* Winner crown bounce */
@keyframes crownBounce {
  0%, 100% { transform: translateY(0) rotate(-5deg); }
  50%       { transform: translateY(-5px) rotate(5deg); }
}
.crown-bounce { animation: crownBounce 1.5s ease-in-out infinite; }

/* Bar fill */
@keyframes barFill {
  from { width: 0%; }
  to   { width: var(--bar-width); }
}
.bar-fill { animation: barFill 0.8s ease forwards; }

/* Red flash */
@keyframes redFlash {
  0%, 100% { background: var(--p-card); }
  50%       { background: rgba(230,57,70,0.1); }
}

/* Diagonal stripe background */
.stripe-bg {
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 20px,
    rgba(230, 57, 70, 0.015) 20px,
    rgba(230, 57, 70, 0.015) 40px
  );
}

/* ── Navigation ── */
.p-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--sp-md) 0;
  background: rgba(8, 8, 8, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--p-border);
  transition: all var(--t-base);
}

.p-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.p-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 3px;
  color: var(--p-white);
  display: flex;
  align-items: center;
  gap: 10px;
}

.p-logo span {
  color: var(--p-red);
}

.p-logo .kana {
  font-family: var(--font-body);
  font-size: 0.65rem;
  color: var(--p-gray);
  letter-spacing: 2px;
  display: block;
  font-weight: 400;
  line-height: 1;
  margin-top: 2px;
}

.p-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

/* ── Language Toggle ── */
.lang-toggle {
  display: flex;
  background: var(--p-card);
  border: 1px solid var(--p-border);
  border-radius: 100px;
  padding: 3px;
  gap: 2px;
}

.lang-toggle button {
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  background: transparent;
  color: var(--p-gray);
  transition: all var(--t-fast);
}

.lang-toggle button.active {
  background: var(--p-red);
  color: white;
}

/* ── API Key Button ── */
.api-key-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  background: var(--p-card);
  border: 1px solid var(--p-border);
  color: var(--p-gray-light);
  font-size: 0.82rem;
  border-radius: var(--r-sm);
  transition: all var(--t-fast);
}
.api-key-btn:hover {
  border-color: var(--p-red);
  color: var(--p-white);
}
.api-key-btn.has-key {
  border-color: var(--p-green);
  color: var(--p-green);
}

/* ── Modal ── */
.p-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}
.p-modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.p-modal {
  background: var(--p-card);
  border: 1px solid var(--p-border);
  border-radius: var(--r-lg);
  padding: var(--sp-xl);
  max-width: 480px;
  width: 100%;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--t-base);
}
.p-modal::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--p-gradient-red);
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}
.p-modal-overlay.open .p-modal {
  transform: translateY(0);
}

.p-modal-close {
  position: absolute;
  top: var(--sp-md);
  right: var(--sp-md);
  background: var(--p-card-2);
  border: 1px solid var(--p-border);
  color: var(--p-gray);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--t-fast);
}
.p-modal-close:hover { color: var(--p-white); border-color: var(--p-red); }

/* ── Responsive ── */
@media (max-width: 768px) {
  :root { font-size: 14px; }
  .container { padding: 0 var(--sp-md); }
  .p-btn { padding: 12px 28px; font-size: 1rem; }
  .p-logo { font-size: 1.3rem; }
  .p-logo .kana { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 12px; }
}

/* ── Use Case Chips ── */
.usecase-section {
  margin-top: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}

.usecase-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}

.usecase-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  background: var(--p-card);
  border: 1.5px solid var(--p-border);
  border-radius: 100px;
  font-size: 0.82rem;
  color: var(--p-gray);
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
}

.usecase-chip:hover {
  border-color: var(--p-red);
  color: var(--p-white);
  background: var(--p-red-subtle);
}

.usecase-chip.active {
  background: var(--p-red-subtle);
  border-color: var(--p-red);
  color: var(--p-white);
  font-weight: 600;
}