/* ============================================================
   MAIN.CSS — Design System & Global Styles
   ProBI Solutions E-commerce MVP
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Custom Properties (Design Tokens) ─────────────────── */
:root {
  /* Colors */
  --bg-base:        #07070f;
  --bg-surface:     #0f0f1a;
  --bg-card:        #16162a;
  --bg-card-hover:  #1e1e35;
  --bg-muted:       #1a1a2e;

  --primary:        #7c3aed;
  --primary-light:  #9d5cf7;
  --primary-glow:   rgba(124, 58, 237, 0.4);
  --primary-subtle: rgba(124, 58, 237, 0.1);

  --accent:         #06b6d4;
  --accent-light:   #22d3ee;
  --accent-glow:    rgba(6, 182, 212, 0.3);

  --gold:           #f59e0b;
  --gold-light:     #fbbf24;
  --success:        #10b981;
  --danger:         #ef4444;
  --warning:        #f59e0b;

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;

  /* Typography */
  --font-heading: 'Sora', sans-serif;
  --font-body:    'Inter', sans-serif;

  /* Spacing */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;

  /* Border Radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-purple: 0 8px 32px rgba(124,58,237,0.3);
  --shadow-cyan:   0 8px 32px rgba(6,182,212,0.2);

  /* Transitions */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:   150ms;
  --duration-normal: 280ms;
  --duration-slow:   450ms;

  /* Layout */
  --container-max:  1280px;
  --nav-height:     70px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) var(--bg-surface);
}

::-webkit-scrollbar        { width: 6px; height: 6px; }
::-webkit-scrollbar-track  { background: var(--bg-surface); }
::-webkit-scrollbar-thumb  { background: var(--primary); border-radius: var(--radius-full); }

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a   { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, select, textarea { font: inherit; }
ul, ol { list-style: none; }

/* ── Typography Scale ─────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-gold {
  background: linear-gradient(135deg, var(--gold) 0%, #ff6b35 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section { padding: var(--space-4xl) 0; }
.section-sm { padding: var(--space-2xl) 0; }

.flex   { display: flex; }
.grid   { display: grid; }
.center { display: flex; align-items: center; justify-content: center; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--duration-normal) var(--ease-smooth);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  min-height: 48px;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--duration-fast);
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: var(--shadow-purple);
}
.btn-primary:hover {
  box-shadow: 0 12px 40px rgba(124,58,237,0.5);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: #fff;
  box-shadow: var(--shadow-cyan);
}
.btn-accent:hover {
  box-shadow: 0 12px 40px rgba(6,182,212,0.4);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255,255,255,0.2);
}
.btn-outline:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
  box-shadow: 0 0 20px var(--primary-glow);
}

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.08);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  min-height: 38px;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
  min-height: 56px;
}

.btn-full { width: 100%; }

/* ── Form Controls ────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-muted);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--duration-fast);
  min-height: 48px;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
  background: var(--bg-card);
}

.form-input.field-error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.2);
}

.form-input.field-filled {
  border-color: var(--success);
}

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

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* ── Section Headers ──────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.35rem 1rem;
  background: var(--primary-subtle);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Scroll Reveal Animation ─────────────────────────────── */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-smooth), transform 0.6s var(--ease-smooth);
}
.reveal-on-scroll.revealed {
  opacity: 1;
  transform: none;
}

/* ── Badge Pop Animation ──────────────────────────────────── */
@keyframes badge-pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.3); }
  100% { transform: scale(1); }
}
.badge-pop { animation: badge-pop 0.4s var(--ease-bounce); }

/* ── Card Enter Animation ─────────────────────────────────── */
@keyframes card-enter {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}
.card-enter {
  animation: card-enter 0.5s var(--ease-smooth) both;
}

/* ── Shake Animation (validation) ────────────────────────── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}
.shake { animation: shake 0.4s var(--ease-smooth); }

/* ── Glow Pulse ───────────────────────────────────────────── */
@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px var(--primary-glow); }
  50%       { box-shadow: 0 0 40px var(--primary-glow), 0 0 60px var(--primary-glow); }
}

/* ── Floating Animation ───────────────────────────────────── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

/* ── Gradient Background Animation ───────────────────────── */
@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ── Toast Container ──────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  color: var(--text-primary);
  transform: translateX(120%);
  transition: transform var(--duration-normal) var(--ease-bounce);
  min-width: 280px;
  max-width: 360px;
  pointer-events: auto;
}

.toast-visible { transform: translateX(0); }

.toast-success { border-left: 3px solid var(--success); }
.toast-error   { border-left: 3px solid var(--danger); }

.toast-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}
.toast-success .toast-icon { background: var(--success); color: #fff; }
.toast-error   .toast-icon { background: var(--danger);  color: #fff; }

/* ── Confetti Canvas ──────────────────────────────────────── */
#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10000;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --space-4xl: 3rem;
    --space-3xl: 2rem;
  }
  .container { padding: 0 var(--space-md); }
  #toast-container {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }
  .toast { min-width: unset; width: 100%; }
}