/* =============================================
   Small Helix — Global Styles
   Light theme for beta pages
   ============================================= */

@import url("/assets/css/sh-icons.css");

/* --- CSS Variables (Theme) --- */
:root {
  --color-bg:           #F7F7FA;
  --color-bg-elevated:  #FFFFFF;
  --color-bg-card:      #FFFFFF;
  --color-bg-card-hover:#F0F0F5;
  --color-border:       #E5E5EA;
  --color-border-light: #D1D1D6;
  --color-text:         #1D1D1F;
  --color-text-secondary:#6E6E73;
  --color-text-muted:   #AEAEB2;
  --color-accent:       #7C5CFC;
  --color-accent-hover: #6344E0;
  --color-accent-soft:  rgba(124, 92, 252, 0.08);
  --color-e1:           #7C5CFC;
  --color-e2:           #F59E0B;
  --color-e3:           #10B981;
  --color-e4:           #3B82F6;
  --font-sans:   'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', monospace;
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   40px;
  --space-2xl:  64px;
  --space-3xl:  96px;
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --shadow-sm: 0 4px 14px rgba(17,24,39,0.06);
  --shadow-md: 0 10px 30px rgba(17,24,39,0.10);
  --shadow-lg: 0 18px 44px rgba(17,24,39,0.14);
  /* Brief: standard card elevation */
  --shadow-elevated: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --max-width: 720px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  animation: sh-page-surface 0.32s ease-out;
}
@keyframes sh-page-surface {
  from { opacity: 0.94; }
  to { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  body { animation: none; }
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-md); }

/* Navbar */
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-lg) var(--space-md); max-width: 960px; margin: 0 auto;
}
.navbar__logo { display: flex; align-items: center; gap: var(--space-sm); }
.navbar__logo-img { height: 32px; width: auto; }
.navbar__logo-text { font-size: 18px; font-weight: 500; letter-spacing: 1px; }
.navbar__logo-text .brand { color: var(--color-accent); }
.navbar__logo-text .word { color: var(--color-text); }

/* Typography */
.section-title {
  font-size: 14px; font-weight: 500; letter-spacing: 3px;
  text-transform: uppercase; color: var(--color-accent); margin-bottom: var(--space-xs);
}
.section-heading {
  font-size: clamp(28px, 5vw, 42px); font-weight: 600;
  line-height: 1.2; letter-spacing: -0.5px; margin-bottom: var(--space-md);
}
.section-desc { font-size: 16px; color: var(--color-text-secondary); max-width: 480px; line-height: 1.7; }

/* Cards */
.card {
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base), background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}
.card:hover { border-color: var(--color-border-light); background: var(--color-bg-card-hover); box-shadow: var(--shadow-md); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
  padding: 12px 28px; border-radius: var(--radius-md); font-size: 15px; font-weight: 500;
  transition: all var(--transition-fast); white-space: nowrap;
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-hover); transform: translateY(-1px); box-shadow: 0 8px 18px rgba(124,92,252,0.28); }
.btn--primary:active { transform: translateY(0); box-shadow: var(--shadow-elevated); }
.btn--ghost { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-secondary); }
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn--ghost:active { transform: scale(0.98); }
.btn--sm { padding: 8px 20px; font-size: 13px; }
.btn:focus-visible {
  outline: 2px solid rgba(124, 92, 252, 0.45);
  outline-offset: 2px;
}

/* Progress Bar */
.progress-bar { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: var(--color-border); z-index: 100; }
.progress-bar__fill { height: 100%; background: var(--color-accent); border-radius: 0 2px 2px 0; transition: width 0.4s ease; }

/* Loader */
.loader { display: flex; flex-direction: column; align-items: center; gap: var(--space-lg); }
.loader__spinner {
  width: 48px; height: 48px; border: 3px solid var(--color-border);
  border-top-color: var(--color-accent); border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader__text { font-size: 16px; color: var(--color-text-secondary); }

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.4s ease forwards; }

/* Responsive */
@media (max-width: 640px) {
  :root { --space-lg: 20px; --space-xl: 32px; }
  .container { padding: 0 var(--space-md); }
}