/* assets/css/style.css - Modern, Apple-like design (light theme) */
:root{
  --bg:#f6f7fb;
  --surface:#ffffff;
  --glass: rgba(255,255,255,0.75);
  --muted:#6b7280;
  --accent:#0071e3; /* subtle blue accent */
  --accent-2:#005bb5;
  --border: rgba(16,24,40,0.06);
  --text:#0f1724;
  --radius:14px;
  --card-radius:18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
.container{max-width:1100px;margin:0 auto;padding:24px}

/* Header */
.site-header{background:transparent;padding:18px 0;border-bottom:1px solid var(--border);backdrop-filter: blur(6px)}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.logo{color:var(--text);text-decoration:none;font-weight:700;font-size:1.05rem;letter-spacing:0.4px}
.nav a{color:var(--muted);margin-left:18px;text-decoration:none;font-weight:600;font-size:0.95rem}
.nav a:hover{color:var(--text)}

/* Hero */
.hero{padding:72px 0;text-align:center}
.hero .inner{background:linear-gradient(180deg, rgba(255,255,255,0.7), rgba(255,255,255,0.6));margin:0 auto;display:inline-block;padding:36px;border-radius:20px;box-shadow:0 8px 30px rgba(16,24,40,0.06);backdrop-filter: blur(6px);}
.hero h1{font-size:2.6rem;margin:0 0 8px;font-weight:700}
.lead{color:var(--muted);font-size:1.05rem;margin-bottom:18px}

.btn{display:inline-block;padding:12px 20px;border-radius:12px;text-decoration:none;font-weight:700;cursor:pointer}
.btn.primary{background:linear-gradient(180deg,var(--accent),var(--accent-2));color:white;border:0;box-shadow:0 6px 18px rgba(3,102,214,0.12)}
.btn.secondary{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn:focus{outline:3px solid rgba(0,113,227,0.12);outline-offset:3px}

/* hero two-column layout */
.hero-inner{display:grid;grid-template-columns:1fr 420px;gap:28px;align-items:center}
.hero-left{text-align:left}
.hero-right{display:flex;align-items:center;justify-content:center}

@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;}
  .hero-right{order:-1;margin-bottom:20px}
}

/* Features */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:32px}
.card{background:var(--surface);padding:22px;border-radius:var(--card-radius);border:1px solid var(--border);box-shadow:0 8px 20px rgba(16,24,40,0.04);transition:transform .18s ease,box-shadow .18s ease}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(16,24,40,0.08)}
.card h3{margin:0 0 8px;font-size:1.05rem}
.card p{margin:0;color:var(--muted)}

/* Footer */
.site-footer{padding:28px 0;text-align:center;color:var(--muted);margin-top:48px}

/* Auth / form area */
.auth-wrap{display:flex;align-items:center;justify-content:center;padding:36px 20px}
.login-container{width:420px;background:linear-gradient(180deg, var(--surface), #fbfcff);border:1px solid var(--border);padding:26px;border-radius:var(--radius);box-shadow:0 20px 40px rgba(16,24,40,0.06)}
.login-container h1{font-size:1.4rem;margin:0 0 8px;text-align:center}
.login-container .subtitle{color:var(--muted);font-size:0.95rem;text-align:center;margin-bottom:16px}

label{display:block;margin-bottom:8px;color:var(--muted);font-size:0.9rem}
input[type="text"],input[type="password"],input[type="email"]{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--text);font-size:1rem}
input::placeholder{color:#aab3c6}
input:focus{outline:none;box-shadow:0 8px 30px rgba(0,113,227,0.06);border-color:rgba(0,113,227,0.12)}

.password-wrap{position:relative}
.pw-toggle{position:absolute;right:10px;top:8px;background:transparent;border:none;color:var(--accent);font-weight:700;padding:8px;cursor:pointer;border-radius:8px}
.pw-toggle:focus{outline:2px solid rgba(0,113,227,0.12)}

button[type="submit"]{width:100%;padding:12px;border-radius:10px;border:0;background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff;font-weight:800;cursor:pointer;font-size:1rem}
button[type="submit"]:hover{transform:translateY(-1px)}

.link-button{background:none;border:0;color:var(--accent);cursor:pointer;padding:0;text-decoration:underline}
.hidden{display:none}
#regWarn{min-height:18px;margin-top:8px;color:var(--danger);font-weight:600}
#loginMessage{min-height:18px;margin-top:10px}
.success{color:var(--success)}
.error{color:var(--danger)}

/* Small screens */
@media (max-width:720px){
  .hero h1{font-size:1.6rem}
  .login-container{width:92%;padding:18px}
  .nav{display:none}
  .container{padding:14px}
}

/* subtle transitions */
*{transition: background-color .12s ease, color .12s ease, border-color .12s ease}

/* accessibility helpers */
.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap}