/* ========================================
   CC Changelog Web — Style
   Warm & Soft Design System
   ======================================== */

*{margin:0;padding:0;box-sizing:border-box}

/* ---- Light Mode (default) ---- */
:root{
  --background: #FAF9F5;
  --foreground: #3D3D3A;
  --card: #FAF8F4;
  --card-foreground: #3D3D3A;
  --primary: #141413;
  --primary-foreground: #FAF9F5;
  --secondary: #F5F4ED;
  --secondary-foreground: #3D3D3A;
  --muted: #F0EEE6;
  --muted-foreground: #73726C;
  --accent: #F0EEE6;
  --accent-foreground: #3D3D3A;
  --border: #F0EEE6;
  --input: #F0EEE6;
  --ring: #3D3D3A;

  --sidebar: #FAF8F4;
  --sidebar-foreground: #3D3D3A;
  --sidebar-primary: #141413;
  --sidebar-primary-foreground: #FAF9F5;
  --sidebar-accent: #F0EEE6;
  --sidebar-accent-foreground: #3D3D3A;
  --sidebar-border: #F0EEE6;
  --sidebar-ring: #3D3D3A;

  /* Semantic colors */
  --text: #3D3D3A;
  --text2: #73726C;
  --text3: #9C9A92;
  --surface: #FFFFFF;
  --surface2: #F5F4ED;
  --surface3: #F0EEE6;

  /* Accent palette (warm tones) */
  --accent1: #8B7355;
  --accent2: #6B8E7B;
  --accent3: #7B8EA6;
  --accent4: #5C8A6E;
  --accent5: #B8915A;
  --accent6: #A6737B;
  --accent7: #9A8B4F;

  --glow: rgba(20,20,19,.04);
  --glow2: rgba(20,20,19,.02);

  --hero-gradient-1: rgba(139,115,85,.08);
  --hero-gradient-2: rgba(107,142,123,.06);
  --card-hover-shadow: rgba(20,20,19,.06);
  --back-to-top-shadow: rgba(20,20,19,.15);

  color-scheme: light;
}

/* ---- Dark Mode ---- */
[data-theme="dark"]{
  --background: #262624;
  --foreground: #C2C0B6;
  --card: #252523;
  --card-foreground: #C2C0B6;
  --primary: #FAF9F5;
  --primary-foreground: #141413;
  --secondary: #1F1E1D;
  --secondary-foreground: #C2C0B6;
  --muted: #1F1E1D;
  --muted-foreground: #9C9A92;
  --accent: #141413;
  --accent-foreground: #C2C0B6;
  --border: #1F1E1D;
  --input: #1F1E1D;
  --ring: #C2C0B6;

  --sidebar: #252523;
  --sidebar-foreground: #C2C0B6;
  --sidebar-primary: #FAF9F5;
  --sidebar-primary-foreground: #141413;
  --sidebar-accent: #141413;
  --sidebar-accent-foreground: #C2C0B6;
  --sidebar-border: #1F1E1D;
  --sidebar-ring: #C2C0B6;

  --text: #C2C0B6;
  --text2: #9C9A92;
  --text3: #73726C;
  --surface: #2C2C29;
  --surface2: #1F1E1D;
  --surface3: #333330;

  --accent1: #C4A87C;
  --accent2: #8BB8A0;
  --accent3: #9BB0C8;
  --accent4: #7AB894;
  --accent5: #D4AB6E;
  --accent6: #C89BA3;
  --accent7: #BCA86A;

  --glow: rgba(194,192,182,.04);
  --glow2: rgba(194,192,182,.02);

  --hero-gradient-1: rgba(196,168,124,.1);
  --hero-gradient-2: rgba(139,184,160,.07);
  --card-hover-shadow: rgba(0,0,0,.2);
  --back-to-top-shadow: rgba(0,0,0,.3);

  color-scheme: dark;
}

html{scroll-behavior:smooth;font-size:16px;scroll-padding-top:60px}
body{background:var(--background);color:var(--text);font-family:'SF Mono','Cascadia Code','JetBrains Mono',Consolas,'Noto Sans SC',monospace;line-height:1.7;overflow-x:hidden;transition:background .3s,color .3s}
::selection{background:var(--primary);color:var(--primary-foreground)}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--background)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* ---- Hero ---- */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:2rem;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 50% 40%,var(--hero-gradient-1),transparent 70%),radial-gradient(ellipse 40% 30% at 30% 60%,var(--hero-gradient-2),transparent 60%);pointer-events:none}
.hero-spotlight{position:absolute;inset:-10%;pointer-events:none;mix-blend-mode:soft-light;opacity:.55;background:radial-gradient(240px at var(--spot-x,50%) var(--spot-y,45%),rgba(139,115,85,.16),transparent 60%);filter:blur(18px);transition:opacity .3s ease}
[data-theme="dark"] .hero-spotlight{background:radial-gradient(240px at var(--spot-x,50%) var(--spot-y,45%),rgba(196,168,124,.22),transparent 60%)}
.hero:hover .hero-spotlight{opacity:.85}
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.4rem 1rem;border:1px solid var(--border);border-radius:999px;font-size:.75rem;color:var(--accent1);background:var(--surface);margin-bottom:2rem;letter-spacing:.05em}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--accent4);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{font-size:clamp(2.5rem,6vw,4.5rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;margin-bottom:1.5rem;color:var(--primary)}
.hero p{font-size:1.1rem;color:var(--text2);max-width:640px;margin-bottom:2.5rem}
.hero-meta{display:flex;gap:2rem;flex-wrap:wrap;justify-content:center;font-size:.8rem;color:var(--text3)}
.hero-meta span{display:flex;align-items:center;gap:.4rem}
.hero-meta .num{color:var(--accent1);font-weight:700;font-size:1rem}

/* ---- Hero CTA ---- */
.hero-cta{display:inline-flex;align-items:center;gap:.5rem;margin-top:1.5rem;padding:.6rem 1.5rem;background:var(--accent1);color:#fff;text-decoration:none;border-radius:8px;font-size:.9rem;font-weight:600;transition:all .3s;letter-spacing:.02em}
.hero-cta:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(139,115,85,.3)}
[data-theme="dark"] .hero-cta:hover{box-shadow:0 6px 20px rgba(196,168,124,.3)}

/* ---- Terminal animation ---- */
.terminal-demo{margin-top:3rem;width:min(680px,90vw);background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;text-align:left;box-shadow:0 20px 60px rgba(0,0,0,.08)}
[data-theme="dark"] .terminal-demo{box-shadow:0 20px 60px rgba(0,0,0,.4)}
.terminal-bar{display:flex;align-items:center;gap:6px;padding:12px 16px;background:var(--surface2);border-bottom:1px solid var(--border)}
.terminal-bar .dot{width:10px;height:10px;border-radius:50%}
.terminal-bar .dot:nth-child(1){background:#ff5f57}
.terminal-bar .dot:nth-child(2){background:#febc2e}
.terminal-bar .dot:nth-child(3){background:#28c840}
.terminal-bar .title{margin-left:auto;font-size:.7rem;color:var(--text3)}
.terminal-body{padding:1.2rem;font-size:.82rem;min-height:180px}
.terminal-body .prompt{color:var(--accent4)}
.terminal-body .cmd{color:var(--text)}
.terminal-body .output{color:var(--text2);margin:.3rem 0}
.terminal-body .highlight{color:var(--accent1)}
.typing{border-right:2px solid var(--accent1);animation:blink .8s infinite}
@keyframes blink{0%,100%{border-color:var(--accent1)}50%{border-color:transparent}}

/* ---- Nav ---- */
.nav{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--background) 85%,transparent);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:.6rem 0}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;align-items:center;gap:1.5rem;overflow-x:auto;scrollbar-width:none}
.nav-inner::-webkit-scrollbar{display:none}
.nav a{color:var(--text3);text-decoration:none;font-size:.75rem;white-space:nowrap;padding:.3rem .6rem;border-radius:6px;transition:all .2s}
.nav a:hover,.nav a.active{color:var(--accent1);background:var(--glow)}
.nav-logo{font-weight:800;color:var(--text)!important;font-size:.85rem;margin-right:auto}

/* ---- Theme & i18n controls ---- */
.nav-controls{display:flex;align-items:center;gap:.5rem;margin-left:auto;flex-shrink:0}
.nav-controls button,.nav-controls select{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:.3rem .5rem;border-radius:6px;cursor:pointer;font-size:.75rem;font-family:inherit;transition:all .2s}
.nav-controls button:hover,.nav-controls select:hover{border-color:var(--accent1);color:var(--accent1)}
.theme-toggle{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0!important;font-size:1rem}
.lang-select{min-width:60px}

/* ---- Sections ---- */
.section{max-width:1200px;margin:0 auto;padding:5rem 1.5rem}
.section-label{display:inline-flex;align-items:center;gap:.5rem;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent1);margin-bottom:.8rem;font-weight:600}
.section-label .icon{font-size:1rem}
.section h2{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;letter-spacing:-.02em;margin-bottom:.8rem;line-height:1.2;color:var(--primary)}
.section .subtitle{color:var(--text2);font-size:1rem;max-width:600px;margin-bottom:3rem}

/* ---- Feature cards ---- */
.grid{display:grid;gap:1.2rem}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem;transition:all .3s;position:relative;overflow:hidden}
.card:hover{border-color:var(--accent1);transform:translateY(-2px);box-shadow:0 8px 30px var(--card-hover-shadow)}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent1),transparent);opacity:0;transition:opacity .3s}
.card:hover::before{opacity:1}
.card-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin-bottom:1rem}
.card h3{font-size:1rem;font-weight:700;margin-bottom:.5rem;color:var(--primary)}
.card p{font-size:.85rem;color:var(--text2);line-height:1.6}
.card .tag{display:inline-block;font-size:.65rem;padding:.15rem .5rem;border-radius:4px;margin-top:.8rem;font-weight:600;letter-spacing:.03em}

/* ---- Scenario blocks ---- */
.scenario{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem;margin-bottom:1.5rem;position:relative}
.scenario-header{display:flex;align-items:flex-start;gap:1rem;margin-bottom:1.2rem}
.scenario-num{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;flex-shrink:0}
.scenario h3{font-size:1.1rem;font-weight:700;color:var(--primary)}
.scenario h3 span{color:var(--text2);font-weight:400;font-size:.85rem;display:block;margin-top:.2rem}
.scenario-body{padding-left:52px}
.scenario-body ul{list-style:none;display:flex;flex-direction:column;gap:.5rem}
.scenario-body li{font-size:.85rem;color:var(--text2);padding-left:1.2rem;position:relative}
.scenario-body li::before{content:'>';position:absolute;left:0;color:var(--accent1);font-weight:700}
.scenario-cmd{display:inline-block;background:var(--surface2);border:1px solid var(--border);padding:.15rem .5rem;border-radius:4px;font-size:.78rem;color:var(--accent3);font-family:inherit;margin:0 .1rem}

/* ---- Timeline ---- */
.timeline{position:relative;padding-left:2rem}
.timeline::before{content:'';position:absolute;left:7px;top:0;bottom:0;width:2px;background:var(--border)}
.timeline-item{position:relative;margin-bottom:2rem;padding-left:1.5rem}
.timeline-item::before{content:'';position:absolute;left:-2rem;top:.5rem;width:16px;height:16px;border-radius:50%;border:2px solid var(--accent1);background:var(--background)}
.timeline-item.major::before{background:var(--accent1);box-shadow:0 0 12px rgba(139,115,85,.3)}
[data-theme="dark"] .timeline-item.major::before{box-shadow:0 0 12px rgba(196,168,124,.3)}
.timeline-date{font-size:.7rem;color:var(--text3);letter-spacing:.05em;margin-bottom:.3rem}
.timeline-version{font-size:1rem;font-weight:700;margin-bottom:.3rem;color:var(--primary)}
.timeline-desc{font-size:.82rem;color:var(--text2)}
.timeline-item.active{background:linear-gradient(90deg,var(--glow),transparent 70%);border-radius:12px;transform:translateX(4px)}
.timeline-item.active .timeline-version{color:var(--accent1)}
.timeline-item.active::before{transform:scale(1.05);box-shadow:0 0 16px rgba(139,115,85,.35)}
[data-theme="dark"] .timeline-item.active::before{box-shadow:0 0 16px rgba(196,168,124,.4)}

/* ---- Stats bar ---- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin:3rem 0}
.stat{text-align:center;padding:1.5rem;background:var(--surface);border:1px solid var(--border);border-radius:12px}
.stat .num{font-size:2rem;font-weight:800;color:var(--accent1)}
.stat .label{font-size:.75rem;color:var(--text3);margin-top:.3rem}

/* ---- Color variants ---- */
.c1{background:rgba(139,115,85,.1);color:var(--accent1)}
.c2{background:rgba(107,142,123,.1);color:var(--accent2)}
.c3{background:rgba(123,142,166,.1);color:var(--accent3)}
.c4{background:rgba(92,138,110,.1);color:var(--accent4)}
.c5{background:rgba(184,145,90,.1);color:var(--accent5)}
.c6{background:rgba(166,115,123,.1);color:var(--accent6)}
.c7{background:rgba(154,139,79,.1);color:var(--accent7)}

[data-theme="dark"] .c1{background:rgba(196,168,124,.12);color:var(--accent1)}
[data-theme="dark"] .c2{background:rgba(139,184,160,.12);color:var(--accent2)}
[data-theme="dark"] .c3{background:rgba(155,176,200,.12);color:var(--accent3)}
[data-theme="dark"] .c4{background:rgba(122,184,148,.12);color:var(--accent4)}
[data-theme="dark"] .c5{background:rgba(212,171,110,.12);color:var(--accent5)}
[data-theme="dark"] .c6{background:rgba(200,155,163,.12);color:var(--accent6)}
[data-theme="dark"] .c7{background:rgba(188,168,106,.12);color:var(--accent7)}

/* ---- Kbd ---- */
kbd{display:inline-block;padding:.1rem .4rem;font-size:.75rem;background:var(--surface2);border:1px solid var(--border);border-radius:4px;font-family:inherit;color:var(--text);box-shadow:0 1px 0 var(--border)}

/* ---- Footer ---- */
.footer{text-align:center;padding:4rem 1.5rem;border-top:1px solid var(--border);color:var(--text3);font-size:.8rem}
.footer a{color:var(--accent1);text-decoration:none}
.footer-cta{color:var(--accent1);font-weight:600}

/* ---- Responsive ---- */
@media(max-width:768px){
  .section{padding:3rem 1rem}
  .scenario-body{padding-left:0;margin-top:1rem}
  .hero h1{font-size:2rem}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .nav-controls{gap:.25rem}
}

/* ---- Animations ---- */
.fade-in{opacity:0;transform:translateY(20px);transition:all .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ---- Back to top ---- */
.back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--primary);color:var(--primary-foreground);border:none;cursor:pointer;font-size:1.2rem;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:all .3s;z-index:99;box-shadow:0 4px 16px var(--back-to-top-shadow)}
.back-to-top.show{opacity:1;pointer-events:auto}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 24px var(--back-to-top-shadow)}

/* ---- Floating side controls ---- */
.floating-controls{position:fixed;right:1.2rem;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:.6rem;z-index:100}
.floating-btn{width:42px;height:42px;border-radius:50%;border:1px solid var(--border);background:color-mix(in srgb,var(--surface) 90%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:var(--text);cursor:pointer;font-size:.7rem;display:flex;align-items:center;justify-content:center;transition:all .3s;box-shadow:0 2px 12px var(--card-hover-shadow);font-family:inherit;line-height:1;position:relative;overflow:hidden}
.floating-btn:hover{border-color:var(--accent1);color:var(--accent1);transform:scale(1.1);box-shadow:0 4px 20px var(--card-hover-shadow)}
.floating-btn::after{content:'';position:absolute;inset:-6px;border:1px dashed var(--border);border-radius:50%;opacity:0;transition:all .25s ease}
.floating-btn:hover::after{opacity:1;transform:scale(1.08);border-color:var(--accent1)}
.floating-theme{font-size:1.1rem}
.floating-lang{font-size:.6rem;font-weight:700;letter-spacing:-.02em}
@media(max-width:768px){
  .floating-controls{right:.6rem;gap:.4rem}
  .floating-btn{width:36px;height:36px}
  .floating-lang{font-size:.55rem}
}

/* ---- Nav mobile scroll hint ---- */
.nav-inner::after{content:'';position:sticky;right:0;flex-shrink:0;width:40px;background:linear-gradient(to right,transparent,var(--background));pointer-events:none;display:none}
@media(max-width:900px){.nav-inner::after{display:block}}

/* ---- Reduced motion ---- */
@media(prefers-reduced-motion:reduce){
  .fade-in{opacity:1;transform:none;transition:none}
  .typing{animation:none;border-right-color:var(--accent1)}
  .hero-badge .dot{animation:none}
  .back-to-top{transition:none}
  .timeline-item.major::before{animation:none}
  .card::after{display:none}
  .hero-particle{display:none}
  .scroll-progress{display:none}
  .hero-spotlight{display:none}
  .card-highlight .tag,.card-highlight-secondary .tag{animation:none}
  .scenario.fade-in{transform:none;opacity:1}
  html{scroll-behavior:auto}
  body{transition:none}
}

/* ---- Recent cards highlight styles ---- */
.card-highlight{border-color:var(--accent1);box-shadow:0 4px 20px var(--card-hover-shadow)}
.card-highlight-secondary{border-color:var(--accent2);box-shadow:0 4px 20px var(--card-hover-shadow)}
.timeline-highlight{color:var(--accent1)}

/* ---- Scroll Progress Bar ---- */
.scroll-progress{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--accent1),var(--accent4),var(--accent3));z-index:200;width:0;transition:width .1s linear;pointer-events:none}

/* ---- Staggered card entrance ---- */
.grid .fade-in:nth-child(1){transition-delay:.05s}
.grid .fade-in:nth-child(2){transition-delay:.1s}
.grid .fade-in:nth-child(3){transition-delay:.15s}
.grid .fade-in:nth-child(4){transition-delay:.2s}
.grid .fade-in:nth-child(5){transition-delay:.25s}
.grid .fade-in:nth-child(6){transition-delay:.3s}
.grid .fade-in:nth-child(7){transition-delay:.35s}
.grid .fade-in:nth-child(8){transition-delay:.4s}
.grid .fade-in:nth-child(9){transition-delay:.45s}
.grid .fade-in:nth-child(10){transition-delay:.5s}
.grid .fade-in:nth-child(11){transition-delay:.55s}
.grid .fade-in:nth-child(12){transition-delay:.6s}

/* ---- Card shimmer on hover ---- */
/* Removed: conflicts with glow trail effect below */

/* ---- Stat number glow ---- */
.stat .num{transition:all .6s ease}
.stat:hover .num{text-shadow:0 0 20px rgba(139,115,85,.3);transform:scale(1.05)}
[data-theme="dark"] .stat:hover .num{text-shadow:0 0 20px rgba(196,168,124,.4)}

/* ---- Timeline dot pulse ---- */
@keyframes timeline-pulse{0%,100%{box-shadow:0 0 0 0 rgba(139,115,85,.4)}50%{box-shadow:0 0 0 8px rgba(139,115,85,0)}}
.timeline-item.major::before{animation:timeline-pulse 3s ease-in-out infinite}
[data-theme="dark"] .timeline-item.major::before{animation:timeline-pulse 3s ease-in-out infinite}
@keyframes timeline-pulse-dark{0%,100%{box-shadow:0 0 0 0 rgba(196,168,124,.4)}50%{box-shadow:0 0 0 8px rgba(196,168,124,0)}}
[data-theme="dark"] .timeline-item.major::before{animation:timeline-pulse-dark 3s ease-in-out infinite}

/* ---- Section heading animated underline ---- */
.section h2{position:relative;display:inline-block}
.section h2::after{content:'';position:absolute;bottom:-.2rem;left:0;width:0;height:3px;background:linear-gradient(90deg,var(--accent1),var(--accent4));border-radius:2px;transition:width .8s ease}
.section h2.visible::after,.fade-in.visible+.fade-in .section h2::after{width:60px}

/* ---- Hero floating particles ---- */
@keyframes float-up{0%{transform:translateY(0) scale(1);opacity:0}10%{opacity:.6}90%{opacity:.6}100%{transform:translateY(-100vh) scale(.5);opacity:0}}
.hero-particle{position:absolute;width:4px;height:4px;border-radius:50%;background:var(--accent1);opacity:0;animation:float-up linear infinite;pointer-events:none}

/* ---- Scenario entrance ---- */
.scenario.fade-in{transform:translateX(-30px) translateY(20px);opacity:0}
.scenario.fade-in.visible{transform:translateX(0) translateY(0);opacity:1}

/* ---- Scenario item hover ---- */
.scenario-body li{transition:transform .2s ease,color .2s ease}
.scenario-body li:hover{transform:translateX(4px);color:var(--text)}

/* ---- Nav link underline animation ---- */
.nav a{position:relative}
.nav a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--accent1);transition:all .3s ease;border-radius:1px}
.nav a:hover::after,.nav a.active::after{width:60%;left:20%}
.nav-logo::after{display:none!important}

/* ---- Back to top entrance ---- */
@keyframes pop-in{0%{transform:scale(0) rotate(-180deg)}100%{transform:scale(1) rotate(0deg)}}
.back-to-top.show{animation:pop-in .4s ease-out}

/* ---- Tag badge animation ---- */
.card-highlight .tag,.card-highlight-secondary .tag{animation:tag-glow 2s ease-in-out infinite alternate}
@keyframes tag-glow{0%{opacity:.85}100%{opacity:1;transform:translateY(-1px)}}

/* ---- Kbd press effect ---- */
kbd{transition:all .15s ease}
kbd:hover{transform:translateY(-1px);box-shadow:0 2px 0 var(--border);background:var(--surface3)}
kbd:active{transform:translateY(1px);box-shadow:none}

/* ---- Card 3D tilt on hover ---- */
.card{transform-style:preserve-3d;perspective:800px}
.card:hover{transform:translateY(-2px) rotateX(1deg) rotateY(-1deg)}

/* ---- Section divider gradient ---- */
.section+.section{border-top:1px solid transparent;background-image:linear-gradient(var(--background),var(--background)),linear-gradient(90deg,transparent,var(--accent1),transparent);background-origin:border-box;background-clip:padding-box,border-box}

/* ---- Glowing border for highlight cards ---- */
@keyframes glow-border{0%,100%{border-color:var(--accent1);box-shadow:0 0 8px rgba(139,115,85,.15)}50%{border-color:var(--accent4);box-shadow:0 0 16px rgba(92,138,110,.2)}}
.card-highlight{animation:glow-border 4s ease-in-out infinite}
[data-theme="dark"] .card-highlight{animation:glow-border 4s ease-in-out infinite}

/* ---- Scenario icon bounce ---- */
.scenario-num{transition:transform .3s ease}
.scenario:hover .scenario-num{transform:scale(1.15) rotate(-5deg)}

/* ---- Timeline item hover glow ---- */
.timeline-item{transition:all .3s ease}
.timeline-item:hover{padding-left:2rem}
.timeline-item:hover .timeline-desc{color:var(--text)}

/* ---- Hero title gradient text ---- */
.hero h1{background:linear-gradient(135deg,var(--primary) 0%,var(--accent1) 50%,var(--primary) 100%);background-size:200% auto;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
@keyframes gradient-shift{0%{background-position:0% center}100%{background-position:200% center}}
.hero h1{animation:gradient-shift 6s linear infinite}

/* ---- Card icon float ---- */
.card-icon{transition:transform .4s ease}
.card:hover .card-icon{transform:translateY(-3px) scale(1.1)}

/* ---- Footer link hover ---- */
.footer a{transition:all .3s ease;position:relative}
.footer a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:1px;background:var(--accent1);transition:width .3s ease}
.footer a:hover::after{width:100%}

/* ---- Stats card hover lift ---- */
.stat{transition:all .4s ease}
.stat:hover{transform:translateY(-4px);border-color:var(--accent1);box-shadow:0 8px 30px var(--card-hover-shadow)}

/* ---- Hero badge shimmer ---- */
@keyframes badge-shimmer{0%{background-position:-200% center}100%{background-position:200% center}}
.hero-badge{background-image:linear-gradient(90deg,var(--surface) 0%,var(--surface2) 40%,var(--surface) 60%,var(--surface) 100%);background-size:200% auto;animation:badge-shimmer 4s linear infinite}

/* ---- Terminal demo glow ---- */
.terminal-demo{transition:all .4s ease}
.terminal-demo:hover{box-shadow:0 20px 80px rgba(139,115,85,.12);transform:translateY(-2px)}
[data-theme="dark"] .terminal-demo:hover{box-shadow:0 20px 80px rgba(196,168,124,.15)}

/* ---- Section label icon pulse ---- */
.section-label span{transition:all .3s ease}
.section-label:hover span{transform:scale(1.05);color:var(--accent4)}

/* ---- Card gradient border on hover ---- */
@keyframes gradient-rotate{0%{--angle:0deg}100%{--angle:360deg}}
.card{background-clip:padding-box}
.card:hover::before{opacity:1;background:linear-gradient(90deg,var(--accent1),var(--accent4),var(--accent2),var(--accent1));background-size:300% 100%;animation:gradient-slide 3s linear infinite}
@keyframes gradient-slide{0%{background-position:0% 0}100%{background-position:300% 0}}

/* ---- Card click ripple ---- */
.card-ripple{position:absolute;border-radius:50%;background:var(--accent1);opacity:.15;transform:scale(0);animation:ripple-expand .6s ease-out forwards;pointer-events:none;z-index:1}
@keyframes ripple-expand{to{transform:scale(4);opacity:0}}

/* ---- Hero aurora effect ---- */
.hero::after{content:'';position:absolute;bottom:0;left:0;right:0;height:40%;background:radial-gradient(ellipse 80% 60% at 20% 100%,rgba(107,142,123,.06),transparent 50%),radial-gradient(ellipse 60% 50% at 80% 100%,rgba(139,115,85,.05),transparent 50%);pointer-events:none;animation:aurora-shift 12s ease-in-out infinite alternate}
@keyframes aurora-shift{0%{opacity:.6;transform:translateX(-5%)}100%{opacity:1;transform:translateX(5%)}}
[data-theme="dark"] .hero::after{background:radial-gradient(ellipse 80% 60% at 20% 100%,rgba(139,184,160,.08),transparent 50%),radial-gradient(ellipse 60% 50% at 80% 100%,rgba(196,168,124,.06),transparent 50%)}

/* ---- Timeline scroll-reveal line ---- */
.timeline-progress{position:absolute;left:7px;top:0;width:2px;height:0;background:linear-gradient(180deg,var(--accent1),var(--accent4));z-index:1;transition:height .1s linear;border-radius:1px}

/* ---- Floating button magnetic hover ---- */
.floating-btn{will-change:transform}

/* ---- Scenario card entrance stagger ---- */
.scenario.fade-in{transition-duration:.8s}
.section .grid + .scenario.fade-in{transition-delay:.2s}

/* ---- Tag shimmer ---- */
.tag{position:relative;overflow:hidden}
.tag::after{content:'';position:absolute;top:0;left:-100%;width:50%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);transition:left .5s ease;pointer-events:none}
.card:hover .tag::after{left:150%}

/* ---- Section number reveal ---- */
.section-label{opacity:0;transform:translateX(-10px);transition:all .5s ease}
.section-label.visible{opacity:1;transform:translateX(0)}

/* ---- Hero CTA pulse ---- */
@keyframes cta-pulse{0%,100%{box-shadow:0 0 0 0 rgba(139,115,85,.3)}50%{box-shadow:0 0 0 8px rgba(139,115,85,0)}}
.hero-cta{animation:cta-pulse 3s ease-in-out infinite}
[data-theme="dark"] .hero-cta{animation:cta-pulse 3s ease-in-out infinite}
@keyframes cta-pulse-dark{0%,100%{box-shadow:0 0 0 0 rgba(196,168,124,.3)}50%{box-shadow:0 0 0 8px rgba(196,168,124,0)}}
[data-theme="dark"] .hero-cta{animation:cta-pulse-dark 3s ease-in-out infinite}

/* ---- Stats number animated underline ---- */
.stat .num{position:relative;display:inline-block}
.stat .num::after{content:'';position:absolute;bottom:-.2rem;left:10%;width:0;height:2px;background:linear-gradient(90deg,var(--accent1),var(--accent4));border-radius:1px;transition:width .8s ease}
.stat:hover .num::after{width:80%}

/* ---- Terminal command line glow ---- */
.terminal-body .cmd{transition:text-shadow .3s ease}
.terminal-demo:hover .terminal-body .cmd{text-shadow:0 0 8px rgba(139,115,85,.2)}
[data-theme="dark"] .terminal-demo:hover .terminal-body .cmd{text-shadow:0 0 8px rgba(196,168,124,.3)}

/* ---- Scenario body item stagger ---- */
.scenario-body li{opacity:0;transform:translateX(-8px);transition:all .4s ease}
.scenario.fade-in.visible .scenario-body li{opacity:1;transform:translateX(0)}
.scenario.fade-in.visible .scenario-body li:nth-child(1){transition-delay:.1s}
.scenario.fade-in.visible .scenario-body li:nth-child(2){transition-delay:.2s}
.scenario.fade-in.visible .scenario-body li:nth-child(3){transition-delay:.3s}
.scenario.fade-in.visible .scenario-body li:nth-child(4){transition-delay:.4s}
.scenario.fade-in.visible .scenario-body li:nth-child(5){transition-delay:.5s}
.scenario.fade-in.visible .scenario-body li:nth-child(6){transition-delay:.6s}

/* ---- Card icon color shift on hover ---- */
.card-icon{transition:transform .4s ease,filter .4s ease}
.card:hover .card-icon{transform:translateY(-3px) scale(1.1);filter:brightness(1.15)}

/* ---- Section title text gradient on hover ---- */
.section h2{transition:all .5s ease}
.section h2:hover{background:linear-gradient(135deg,var(--primary) 0%,var(--accent1) 40%,var(--accent4) 100%);background-size:200% auto;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ---- Nav scroll shadow ---- */
.nav{transition:box-shadow .3s ease}
.nav.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.06)}
[data-theme="dark"] .nav.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.2)}

/* ---- Card parallax tilt effect ---- */
.card{transition:all .3s ease,transform .1s ease;will-change:transform}
.card:hover{transform:translateY(-2px) rotateX(var(--card-rotate-x,0deg)) rotateY(var(--card-rotate-y,0deg)) scale(1.02)}

/* ---- Floating button magnetic effect ---- */
.floating-btn{transition:all .25s cubic-bezier(.34,1.56,.64,1)}
.floating-btn:hover{transform:scale(1.15) translateX(-3px)}

/* ---- Hero particle rain ---- */
@keyframes particle-fall{0%{transform:translateY(-10vh) translateX(0) scale(1);opacity:0}10%{opacity:.7}50%{opacity:.5}90%{opacity:.3}100%{transform:translateY(110vh) translateX(calc(var(--drift,0) * 20px)) scale(.3);opacity:0}}
.hero-particle{position:absolute;width:6px;height:6px;border-radius:50%;background:radial-gradient(circle,var(--accent1),transparent);opacity:0;animation:particle-fall linear infinite;pointer-events:none;filter:blur(1px)}
.hero-particle:nth-child(2){left:15%;animation-duration:8s;animation-delay:1s;--drift:1}
.hero-particle:nth-child(3){left:35%;animation-duration:10s;animation-delay:2s;--drift:-1;background:radial-gradient(circle,var(--accent2),transparent)}
.hero-particle:nth-child(4){left:55%;animation-duration:12s;animation-delay:0.5s;--drift:2}
.hero-particle:nth-child(5){left:75%;animation-duration:9s;animation-delay:3s;--drift:-2;background:radial-gradient(circle,var(--accent4),transparent)}
.hero-particle:nth-child(6){left:90%;animation-duration:11s;animation-delay:1.5s;--drift:1.5}

/* ---- Section entrance wave ---- */
@keyframes wave-entrance{0%{transform:translateX(-100%) skewX(-15deg);opacity:0}60%{opacity:.8}100%{transform:translateX(0) skewX(0);opacity:1}}
.section.visible::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,transparent,var(--accent1),var(--accent4),transparent);animation:wave-entrance 1.2s cubic-bezier(.23,1,.32,1)}

/* ---- Card hover glow trail ---- */
.card::after{content:'';position:absolute;inset:-2px;background:linear-gradient(135deg,var(--accent1),var(--accent4),var(--accent2));border-radius:12px;opacity:0;z-index:-1;filter:blur(15px);transition:opacity .4s ease}
.card:hover::after{opacity:.25}

/* ---- Timeline progress bar animation ---- */
@keyframes timeline-grow{from{height:0}to{height:100%}}
.timeline::after{content:'';position:absolute;left:7px;top:0;width:2px;height:0;background:linear-gradient(180deg,var(--accent1),var(--accent4),transparent);z-index:1;animation:timeline-grow 1.5s ease-out forwards;animation-delay:.5s}

/* ---- Kbd key press animation ---- */
@keyframes key-press{0%{transform:translateY(0) scale(1);box-shadow:0 2px 0 var(--border)}50%{transform:translateY(2px) scale(.98);box-shadow:0 0 0 var(--border)}100%{transform:translateY(0) scale(1);box-shadow:0 2px 0 var(--border)}}
kbd:active{animation:key-press .15s ease}

/* ---- Stats counter rolling effect ---- */
@keyframes counter-roll{0%{transform:translateY(100%);opacity:0}100%{transform:translateY(0);opacity:1}}
.stat.visible .num{animation:counter-roll .6s cubic-bezier(.34,1.56,.64,1)}

/* ---- Tag badge wave shimmer ---- */
@keyframes tag-wave{0%{background-position:-200% center}100%{background-position:200% center}}
.tag{background:linear-gradient(90deg,currentColor 0%,currentColor 45%,rgba(255,255,255,.3) 50%,currentColor 55%,currentColor 100%);background-size:200% 100%;-webkit-background-clip:text;background-clip:text;animation:tag-wave 3s linear infinite}

/* ---- Hero CTA breathing pulse ---- */
@keyframes cta-breathe{0%,100%{transform:scale(1);box-shadow:0 6px 20px rgba(139,115,85,.25)}50%{transform:scale(1.03);box-shadow:0 8px 30px rgba(139,115,85,.35)}}
.hero-cta:hover{animation:cta-breathe 2s ease-in-out infinite}

/* ---- Terminal typing cursor blink ---- */
@keyframes cursor-blink{0%,49%{border-right-color:var(--accent1)}50%,100%{border-right-color:transparent}}
.typing{animation:cursor-blink .9s step-end infinite}

/* ---- Scenario icon rotation on hover ---- */
.scenario:hover .scenario-num{animation:icon-spin .6s ease-in-out}
@keyframes icon-spin{0%{transform:rotate(0deg) scale(1)}50%{transform:rotate(180deg) scale(1.2)}100%{transform:rotate(360deg) scale(1)}}

/* ---- Floating control ripple effect ---- */
@keyframes ripple-out{from{transform:scale(1);opacity:.5}to{transform:scale(1.8);opacity:0}}
.floating-btn::before{content:'';position:absolute;inset:0;border:2px solid var(--accent1);border-radius:50%;opacity:0;pointer-events:none}
.floating-btn:active::before{animation:ripple-out .6s ease-out}

/* ---- Section divider animated gradient ---- */
.section+.section::before{content:'';position:absolute;top:0;left:5%;right:5%;height:1px;background:linear-gradient(90deg,transparent,var(--accent1),var(--accent4),var(--accent2),transparent);background-size:200% 100%;animation:gradient-flow 4s linear infinite}
@keyframes gradient-flow{to{background-position:200% center}}

/* ---- Back to top bounce entrance ---- */
@keyframes bounce-in{0%{transform:scale(0) translateY(20px);opacity:0}50%{transform:scale(1.1) translateY(-5px)}100%{transform:scale(1) translateY(0);opacity:1}}
.back-to-top.show{animation:bounce-in .5s cubic-bezier(.68,-.55,.265,1.55)}

/* ---- Card icon bounce on hover ---- */
@keyframes icon-bounce{0%,100%{transform:translateY(-3px) scale(1.1)}25%{transform:translateY(-6px) scale(1.15)}75%{transform:translateY(-1px) scale(1.08)}}
.card:hover .card-icon{animation:icon-bounce .8s ease-in-out infinite}