@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root{
  /* Palette Baru: Lebih Deep & Premium */
  --bg: #010409; /* Ultra Dark Blue/Black */
  --card: #0d1117; /* Background Card yang halus */
  --muted: #8b949e; /* Muted yang lebih lembut */
  --text: #c9d1d9; /* Teks default */
  --primary: #58a6ff; /* Biru yang lebih cerah dan menonjol */
  --success: #3fb950; /* Hijau yang lebih cerah */
  --danger: #f85149;
  --ring: #1f2937;
  /* Bayangan yang sangat subtle untuk dark mode */
  --shadow-subtle: 0 4px 15px rgba(0,0,0,0.4);
  --border-radius-lg: 16px; /* Konsistensi border radius */
  --border-radius-md: 10px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; 
  font-family:'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-weight: 400;
  /* Background yang lebih sederhana, fokus pada dark theme */
  background-color: var(--bg);
  background-image: radial-gradient(1000px at 15% 10%, rgba(88, 166, 255, .08), transparent);
  color:var(--text);
  line-height: 1.5; /* Line height standar */
  overflow-x: hidden;
}

.container{
  max-width:1120px; /* Lebih lebar */
  margin:80px auto; /* Margin atas/bawah lebih luas */
  padding:0 30px; /* Padding samping lebih besar */
}

/* Header & Navigasi */
.header{
  display:flex; align-items:center; justify-content:space-between; gap:24px;
  margin-bottom:50px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(139, 148, 158, .1); /* Garis pemisah lebih halus */
}
.brand{
  display:flex; align-items:center; gap:16px;
}
.header-actions{
  display: flex;
  gap: 12px;
}
.action-btn{
  /* Tombol Aksi yang lebih understated (minimalis) */
  padding: 8px 14px;
  border-radius: var(--border-radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  background: var(--card);
  color: var(--muted);
  border: 1px solid rgba(139, 148, 158, .2);
  transition: all .2s ease;
}
.action-btn:hover{
  background: #161b22;
  color: var(--text);
  border-color: var(--primary);
}

.badge{
  font-size:14px; font-weight: 600;
  padding:7px 14px; border-radius:999px;
  background:rgba(88, 166, 255,.15); color:var(--primary);
  border:1px solid rgba(88, 166, 255,.3);
}

/* Kartu */
.card{
  background: var(--card);
  border:1px solid #21262d; /* Border yang lebih solid tapi lembut */
  border-radius:var(--border-radius-lg);
  padding:35px; /* Padding lebih luas */
  box-shadow:var(--shadow-subtle);
  transition: border-color .3s ease;
}
.card:hover {
  border-color: #30363d; /* Hover effect minimal */
}

.grid{
  display:grid; grid-template-columns: 3fr 2fr;
  gap:40px; /* Jarak antar kolom lebih luas */
}
@media (max-width: 900px){ .grid{ grid-template-columns: 1fr; } }

h1{font-size:32px; margin:0; font-weight: 800;} /* H1 lebih besar */
.sub{color:var(--muted); font-size:16px; font-weight: 400;}

.section-title{
  font-size:22px; /* Judul section lebih besar */
  font-weight:700; 
  margin:0 0 20px; /* Jarak bawah lebih luas */
  color: var(--text)
}

/* Input & Tombol Generate */
.input-row{display:flex; gap:16px; flex-wrap:wrap}
.input{
  flex:1 1 300px; padding:15px 18px; 
  border-radius:var(--border-radius-md);
  border:1px solid #30363d; 
  background: var(--bg); 
  color:var(--text);
  outline:none; transition:box-shadow .2s,border-color .2s;
  font-size: 16px;
}
.input:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(88, 166, 255,.2); /* Ring fokus yang lebih halus */
  background: #000;
}

.btn{
  padding:15px 20px; 
  border-radius:var(--border-radius-md); 
  border:1px solid rgba(88, 166, 255,.6);
  /* Gradient yang lebih halus */
  background:linear-gradient(180deg,rgba(88, 166, 255,.2),rgba(88, 166, 255,.1));
  color:var(--text); 
  font-weight:700;
  cursor:pointer; transition:all .2s ease;
  box-shadow: 0 4px 10px rgba(88, 166, 255,.15);
  min-width: 140px; 
}
.btn:hover{
  background:linear-gradient(180deg,rgba(88, 166, 255,.3),rgba(88, 166, 255,.2));
  box-shadow: 0 6px 15px rgba(88, 166, 255,.25);
  transform:translateY(-1px);
}
.btn:active{transform:translateY(0); box-shadow: 0 2px 5px rgba(88, 166, 255,.1)}
.btn:disabled{opacity:.5; cursor:not-allowed; transform:none; box-shadow: none; filter: grayscale(100%)}


/* KPI Metrics */
.kpi{
  display:flex; gap:20px; align-items:center; margin-top:25px;
}
.kpi-item{
  flex:1; padding:18px; 
  border-radius:var(--border-radius-lg); 
  border:1px dashed #30363d; /* Border dashed halus */
  background: #161b22;
  display:flex; align-items:center; justify-content:space-between; gap:15px;
}
.kpi-label{color:var(--muted); font-size:14px; font-weight: 500;}
.kpi-value{font-size:28px; font-weight:800; letter-spacing: -0.5px;} /* Lebih besar */
.kpi-value.timer-danger { color: var(--danger); }
.kpi-value.timer-ok { color: var(--success); }


/* Alert & Hasil OTP */
.alert{
  margin-top:25px; font-size:14px; padding:16px; 
  border-radius:var(--border-radius-md); 
  line-height:1.5;
  border:1px solid #30363d;
  background: #161b22;
  color:var(--muted);
}
.alert strong{color:var(--text); font-weight: 600;}

.result-wrapper{
  position: relative;
  margin-top:20px;
}
.result{
  padding:25px; border-radius:var(--border-radius-lg);
  font-size:48px; font-weight:900; /* OTP sangat besar */
  letter-spacing:6px; /* Jarak huruf lebih lebar */
  text-align:center;
  background:rgba(63, 185, 80,.15); 
  color:#a7f3d0;
  border:1px solid rgba(63, 185, 80,.4);
  box-shadow: 0 0 20px rgba(63, 185, 80,.2); /* Glow yang lebih kuat */
  cursor: pointer;
  transition: all .2s ease;
}
.result:hover{
  background:rgba(63, 185, 80,.25);
}
.result.error{
  background:rgba(248, 81, 73,.15); color:#fecaca;
  border-color:rgba(248, 81, 73,.4);
  box-shadow: 0 0 20px rgba(248, 81, 73,.2);
}

/* Tombol Salin */
.copy-btn{
  position: absolute;
  top: 10px;
  right: 15px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  opacity: 0;
  transition: opacity .2s, background .2s;
  pointer-events: none; /* Agar tidak menghalangi klik pada result */
}
.result-wrapper:hover .copy-btn,
.copy-btn.show {
  opacity: 1;
  pointer-events: auto;
}
.copy-btn:hover{
  background: rgba(255, 255, 255, 0.25);
}

/* Dokumentasi API */
.docs p{
  margin-top: 18px; /* Spacing lebih rapi */
  margin-bottom: 8px;
  font-weight: 600;
}
.docs code{
  background:#161b22; 
  padding:4px 8px; border-radius:6px;
  border:1px solid #30363d;
  color:var(--primary); font-weight: 500;
}
pre{
  margin:0; /* Hapus margin atas/bawah */
  padding:18px;
  background:#0d1117; 
  border-radius:var(--border-radius-md); 
  border:1px solid #30363d;
  overflow-x:auto; 
  font-size:14px; 
  line-height:1.6;
  color:#e5e7eb;
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
  box-shadow: inset 0 0 5px rgba(0,0,0,.2);
}

.footer{
  margin:60px auto 30px; 
  padding-top:20px; 
  color:var(--muted); text-align:center; font-size:14px;
  border-top: 1px solid rgba(139, 148, 158, .1);
}