/*
  BlueSparrow Labs — CSS Framework
  - Reset & base
  - Custom properties (theme)
  - Typography system
  - Layout utilities (container, grid, flex)
  - Components (buttons, header, nav, hero, cards, forms, modal, footer)
  - Responsive (mobile-first)
  - Accessibility helpers & print styles
*/

/* 1) Modern CSS Reset */
*,*::before,*::after{box-sizing:border-box}
html{line-height:1.15;-webkit-text-size-adjust:100%}
body{margin:0}
main{display:block}
h1{font-size:2em;margin:0.67em 0}
hr{height:0;color:inherit}
abbr[title]{text-decoration:underline dotted}
b,strong{font-weight:bolder}
code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;font-size:1em}
small{font-size:80%}
sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
sub{bottom:-0.25em}sup{top:-0.5em}
table{border-color:currentColor;text-indent:0}
button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}
button,select{text-transform:none}
button,[type="button"],[type="reset"],[type="submit"]{-webkit-appearance:button}
::-moz-focus-inner{border-style:none;padding:0}
:-moz-focusring{outline:1px dotted ButtonText}
:-moz-ui-invalid{box-shadow:none}
legend{padding:0}
progress{vertical-align:baseline}
::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}
[type="search"]{-webkit-appearance:textfield;outline-offset:-2px}
::-webkit-search-decoration{-webkit-appearance:none}
::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}
summary{display:list-item}
img{max-width:100%;height:auto;display:block}

/* 2) Theme Variables */
:root{
  --color-bg:#0b1324;
  --color-surface:#0e1a2b;
  --color-elev:#13233a;
  --color-primary:#1b74e4;
  --color-primary-600:#155ec0;
  --color-accent:#13b0a5;
  --color-text:#e6eef8;
  --color-muted:#93a3b8;
  --color-border:#21344f;
  --focus:#ffd666;
  --header-glass:0.18; /* dynamic via JS */
  --header-blur:8px;   /* dynamic via JS */

  --font-sans: ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji";
  --font-mono: ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;

  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:18px;

  --shadow-sm:0 1px 2px rgba(0,0,0,0.1);
  --shadow-md:0 6px 16px rgba(0,0,0,0.25);
  --shadow-lg:0 12px 30px rgba(0,0,0,0.35);

  --container:1200px;
  --gutter:24px;
}

@media (prefers-color-scheme: light){
  :root{ --color-bg:#f7fbff; --color-surface:#ffffff; --color-elev:#eef3fb; --color-text:#0a2540; --color-muted:#405a79; --color-border:#d9e3f2; }
}

/* 3) Base */
html{scroll-behavior:smooth}
body{
  background:linear-gradient(180deg,var(--color-bg) 0%, var(--color-elev) 50%, var(--color-surface) 100%);
  color:var(--color-text);
  font-family:var(--font-sans);
  line-height:1.6;
}
a{color:var(--color-accent);text-decoration:none}
a:hover{text-decoration:underline}

.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;background:#000;color:#fff;padding:8px 12px;border-radius:6px}

/* 4) Layout */
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(56px,8vw,100px) 0}

/* 5) Typography */
h1{font-size:clamp(2rem,6vw,3.25rem);line-height:1.15;margin:0 0 0.5em}
h2{font-size:clamp(1.5rem,3.5vw,2.25rem);margin:0 0 0.5em}
h3{font-size:clamp(1.125rem,2.5vw,1.5rem);margin:0 0 0.5em}
p{margin:0 0 1em}
.text-link{color:var(--color-primary)}

/* 6) Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 18px;border-radius:999px;border:1px solid transparent;background:transparent;color:var(--color-text);cursor:pointer;transition:.2s ease;min-height:44px}
.btn:focus{outline:3px solid var(--focus);outline-offset:2px}
.btn:hover{filter:brightness(1.08);box-shadow:0 8px 26px rgba(0,0,0,0.35)}
.btn-primary{background:linear-gradient(180deg,var(--btn-bg,var(--color-primary)),var(--btn-bg2,var(--color-primary-600)));color:#fff;box-shadow:var(--shadow-md)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 12px 36px var(--btn-glow,rgba(27,116,228,0.6)), 0 0 24px var(--btn-glow,rgba(27,116,228,0.55))}
.btn-secondary{border-color:var(--color-border);background:var(--color-elev)}
.btn-secondary:hover{box-shadow:0 10px 28px rgba(0,0,0,0.4)}
.btn-outline{border-color:var(--color-primary);color:var(--color-primary)}
.btn-outline:hover{background:rgba(27,116,228,0.12);box-shadow:0 10px 28px rgba(27,116,228,0.45)}

/* Prominent selected/focus effects */
.btn:focus-visible{outline:3px solid var(--focus);outline-offset:4px;box-shadow:0 0 0 6px rgba(255,214,102,0.5), 0 16px 40px rgba(0,0,0,0.45)}
.btn-primary:focus-visible{box-shadow:0 0 0 6px var(--btn-glow,rgba(27,116,228,0.55)), 0 18px 46px var(--btn-glow,rgba(27,116,228,0.6))}

/* Demo swatch layout */
.demo-swatch{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}
.demo-note{color:var(--color-muted);font-size:.9rem;margin-top:8px}
.btn-secondary:focus-visible{box-shadow:0 0 0 6px rgba(255,255,255,0.28), 0 18px 46px rgba(0,0,0,0.5)}
.btn-outline:focus-visible{box-shadow:0 0 0 6px rgba(27,116,228,0.5), 0 18px 46px rgba(27,116,228,0.5)}
.btn:active{transform:translateY(1px)}

/* 7) Header & Nav */
.site-header{position:sticky;top:0;z-index:50;background:rgba(20,40,70,var(--header-glass));backdrop-filter:saturate(120%) blur(var(--header-blur));transition:background-color .2s ease,border-color .2s ease,backdrop-filter .2s ease;border-bottom:1px solid transparent}
.site-header.is-scrolled{background:rgba(20,40,70,var(--header-glass));border-color:rgba(255,255,255,0.05)}
.header-content{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--color-text);font-weight:700;padding:8px 10px;transition:.2s ease}
.brand:hover{filter:brightness(1.03)}
.brand-text{
  color:var(--color-text);
  text-shadow:0 1px 2px rgba(0,0,0,0.55), 0 0 1px rgba(0,0,0,0.35);
  font-size:clamp(1.05rem,2.2vw,1.35rem);
}
/* no gradient on scroll */
.brand-text{letter-spacing:.2px}
.nav-toggle{display:inline-flex;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle:focus{outline:3px solid var(--focus);outline-offset:2px}
.nav-toggle .nav-toggle-bar{width:24px;height:2px;background:var(--color-text);display:block;transition:.2s ease}
.nav{position:fixed;inset:0 0 0 auto;transform:translateX(100%);transition:transform .25s ease;background:var(--color-surface);padding:80px 24px 24px;max-width:320px;box-shadow:var(--shadow-lg)}
.nav.is-open{transform:translateX(0)}
.nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:16px}
.nav-link{color:var(--color-text);padding:10px 14px;border-radius:999px;transition:.2s ease}
.nav-link:hover{text-decoration:none}
.brand:hover{text-decoration:none}
.nav-link:hover{background:rgba(27,116,228,0.12);box-shadow:0 8px 22px rgba(27,116,228,0.35)}
.nav-link:focus-visible,.brand:focus-visible{outline:3px solid var(--focus);outline-offset:2px;background:rgba(255,255,255,0.12)}
.nav-link.is-active{background:rgba(27,116,228,0.18);box-shadow:0 8px 24px rgba(27,116,228,0.45), 0 0 0 1px rgba(27,116,228,0.55) inset}
@media (min-width: 900px){
  .nav{all:unset}
  .nav{display:block}
  .nav-list{flex-direction:row;gap:4px;padding:10px;border-radius:999px;background:rgba(255,255,255,0.08);backdrop-filter:saturate(120%) blur(6px);border:1px solid rgba(255,255,255,0.1);box-shadow:var(--shadow-sm)}
  .nav-toggle{display:none}
}

/* 8) Hero */
.hero{position:relative}
.hero-grid{display:grid;gap:28px;grid-template-columns:1fr}
.hero-subtitle{color:var(--color-muted);max-width:60ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}
.hero-art{aspect-ratio:4/3;border-radius:var(--radius-lg);background:radial-gradient(1200px 400px at 20% -20%,rgba(19,176,165,0.35),transparent 50%),linear-gradient(135deg,rgba(27,116,228,0.6),rgba(19,176,165,0.35)),linear-gradient(180deg,var(--color-elev),var(--color-surface));box-shadow:inset 0 1px 0 rgba(255,255,255,0.06),var(--shadow-lg)}

/* Slideshow Styles */
.slideshow{position:relative;overflow:hidden;border-radius:var(--radius-lg);box-shadow:inset 0 1px 0 rgba(255,255,255,0.06),var(--shadow-lg)}
.hero-slideshow{aspect-ratio:4/3}
.about-slideshow{aspect-ratio:1/1;border-radius:16px}
.slideshow img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 0.8s ease-in-out}
.slideshow img.active{opacity:1;position:relative}
.slideshow img:only-child{opacity:1;position:relative}
.slideshow-placeholder{aspect-ratio:inherit;border-radius:inherit;background:radial-gradient(1200px 400px at 20% -20%,rgba(19,176,165,0.35),transparent 50%),linear-gradient(135deg,rgba(27,116,228,0.6),rgba(19,176,165,0.35)),linear-gradient(180deg,var(--color-elev),var(--color-surface))}
.about-slideshow .slideshow-placeholder{background:linear-gradient(180deg,#1d2d48,#0f1a2b)}

@media (min-width: 900px){
  .hero-grid{grid-template-columns:1.1fr .9fr;align-items:center}
}

/* 9) About */
.about-grid{display:grid;gap:28px}
.about-photo{aspect-ratio:1/1;border-radius:16px;background:linear-gradient(180deg,#1d2d48,#0f1a2b);box-shadow:var(--shadow-md)}
.about-stats{display:flex;gap:18px;flex-wrap:wrap;margin:16px 0}
.stat{background:var(--color-elev);border:1px solid var(--color-border);padding:14px 16px;border-radius:12px;min-width:120px;text-align:center}
.stat-num{display:block;font-size:clamp(1.25rem,3vw,1.75rem);font-weight:700}
.stat-label{display:block;color:var(--color-muted);font-size:.9rem}
.skills-list{list-style:none;display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:8px 0 0}
.badge{background:#1f3c68;border:1px solid rgba(27,116,228,0.6);color:#ffffff;padding:8px 12px;border-radius:999px;font-weight:600}
@media (min-width: 900px){
  .about-grid{grid-template-columns:1fr 1.4fr;align-items:center}
}

/* 10) Apps */
.section-header p{color:var(--color-muted)}
.app-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width: 640px){.app-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width: 1024px){.app-grid{grid-template-columns:repeat(3,1fr)}}
.app-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow-sm)}
.app-card.muted{align-items:center;justify-content:center;color:var(--color-muted);min-height:120px}
.app-card-header{display:flex;gap:12px;align-items:center}
.app-icon{width:56px;height:56px;border-radius:12px;background:linear-gradient(180deg,#2a4570,#1a2c4a);box-shadow:inset 0 1px 0 rgba(255,255,255,0.06),var(--shadow-sm);display:inline-flex;align-items:center;justify-content:center;overflow:hidden}
.app-icon img{width:100%;height:100%;object-fit:cover;display:block}
.app-name{margin:0}
.app-tagline{margin:2px 0 0;color:var(--color-muted)}
.app-features{margin:0;padding-left:18px}
.app-actions{display:flex;gap:10px;flex-wrap:wrap}

/* 11) Forms */
.contact-form{background:var(--color-surface);border:1px solid var(--color-border);border-radius:14px;padding:16px}
.form-grid{display:grid;gap:12px;grid-template-columns:1fr}
@media (min-width: 768px){.form-grid{grid-template-columns:repeat(2,1fr)}}
.form-field{display:flex;flex-direction:column;gap:6px;color:var(--color-muted)}
.form-field--full{grid-column:1/-1}
input,textarea{background:var(--color-elev);border:1px solid var(--color-border);border-radius:10px;padding:14px 14px;line-height:1.5;font-size:16px;color:var(--color-text)}
input:focus,textarea:focus{outline:3px solid var(--focus);outline-offset:2px}
.form-note{color:var(--color-muted);margin:8px 0}
.form-status{margin-top:8px;min-height:20px;color:var(--color-accent)}
.cf-turnstile{margin:16px 0}

/* 12) Modal */
.modal{position:fixed;inset:0;display:none}
.modal[aria-hidden="false"]{display:block}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,0.5)}
.modal-dialog{position:relative;margin:10vh auto;background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;max-width:720px;width:92%;padding:16px}
.modal-dialog{display:flex;flex-direction:column;max-height:calc(100vh - 80px);overflow:hidden}
.modal-header{display:flex;align-items:center;justify-content:space-between}
.modal-close{background:none;border:0;color:var(--color-text);font-size:1.5rem;cursor:pointer}
/* Modal footer links (used in app detail modals) */
.modal-footer{margin-top:16px;border-top:1px solid rgba(255,255,255,0.04);padding-top:12px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.modal-footer .text-link{color:var(--color-primary);font-weight:600}
.modal-footer .text-link:focus,.modal-footer .text-link:hover{text-decoration:underline}

/* Modal body scrolling + policy content */
.modal-body{overflow:auto;padding-top:12px;max-height:calc(100vh - 200px)}
.policy-content{color:var(--color-text);line-height:1.6;max-width:760px;margin:0 auto}
.policy-content a{color:var(--color-primary)}
.policy-content h1,h2,h3{color:var(--color-text);margin-top:0}

/* Modal toolbar */
.modal-toolbar{display:flex;align-items:center;gap:8px}
.modal-toolbar .btn{padding:8px 10px;border-radius:8px}
.modal-toolbar .modal-close{margin-left:8px}

/* 13) Footer */
.site-footer{border-top:1px solid var(--color-border);padding:24px 0;background:rgba(0,0,0,0.2)}
.footer-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.social a{margin-right:10px}

/* 14) Utilities */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* 15) Print */
@media print{
  .nav-toggle,.nav{display:none !important}
  .btn{border:1px solid #000}
}