:root{
    --bg:#f5f7fb;
    --card:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
    --line:#e5e7eb;
    --primary:#1e3a8a;
    --primary-2:#2563eb;
    --accent:#f59e0b;
    --danger:#b91c1c;
    --danger-bg:#fee2e2;
    --success:#166534;
    --success-bg:#dcfce7;
    --shadow:0 8px 24px rgba(0,0,0,0.06);
    --radius:18px;
    --max:1100px;
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:Arial,Helvetica,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
}

img{
    max-width:100%;
    display:block;
}

a{
    text-decoration:none;
    color:inherit;
}

.container{
    width:min(92%, var(--max));
    margin:0 auto;
}

/* =========================
   HEADER / NAV
========================= */

header{
    background:rgba(255,255,255,0.96);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    position:sticky;
    top:0;
    z-index:1000;
}

.nav{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:14px 0;
}

.logo-wrap{
    display:flex;
    align-items:center;
    gap:12px;
    min-width:0;
}

.logo{
    width:44px;
    height:44px;
    border-radius:14px;
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:700;
    box-shadow:var(--shadow);
    flex-shrink:0;
}

.logo-text{
    min-width:0;
}

.logo-text h1{
    font-size:20px;
    line-height:1.2;
    color:var(--primary);
    margin:0;
}

.logo-text p{
    font-size:13px;
    color:var(--muted);
    margin:0;
}

.menu{
    display:flex;
    align-items:center;
    gap:14px;
    flex-wrap:wrap;
    justify-content:flex-end;
}

.menu a{
    font-size:14px;
    font-weight:700;
    color:var(--text);
    padding:8px 10px;
    border-radius:10px;
    transition:.2s ease;
}

.menu a:hover{
    background:#eef4ff;
    color:var(--primary-2);
}

/* =========================
   HERO
========================= */

.hero{
    padding:28px 0 18px;
}

.hero-inner{
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:20px;
    align-items:stretch;
}

.hero-content{
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    color:#fff;
    border-radius:28px;
    padding:28px;
    box-shadow:var(--shadow);
}

.badge{
    display:inline-block;
    background:rgba(255,255,255,.16);
    color:#fff;
    padding:7px 12px;
    border-radius:999px;
    font-size:12px;
    font-weight:700;
    margin-bottom:14px;
}

.hero-content h2{
    font-size:clamp(28px, 5vw, 44px);
    line-height:1.15;
    margin-bottom:14px;
}

.hero-content p{
    color:rgba(255,255,255,.94);
    font-size:16px;
    max-width:680px;
}

.hero-buttons{
    display:flex;
    gap:12px;
    flex-wrap:wrap;
    margin-top:20px;
}

.hero-box{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:28px;
    padding:24px;
    box-shadow:var(--shadow);
    display:flex;
    flex-direction:column;
    justify-content:center;
    gap:16px;
}

.hero-box h3{
    color:var(--primary);
    font-size:18px;
    margin-bottom:4px;
}

.hero-box p{
    color:var(--muted);
    font-size:14px;
}

/* =========================
   BUTTONS
========================= */

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:44px;
    padding:12px 18px;
    border:none;
    border-radius:999px;
    font-size:14px;
    font-weight:700;
    cursor:pointer;
    transition:.2s ease;
}

.btn:hover{
    transform:translateY(-1px);
}

.btn-primary{
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    color:#fff;
}

.btn-outline{
    background:#fff;
    color:var(--primary);
    border:1px solid var(--line);
}

.btn-outline:hover{
    border-color:var(--primary-2);
    color:var(--primary-2);
}

/* =========================
   SECTIONS
========================= */

.section{
    padding:26px 0;
}

.section-head{
    margin-bottom:20px;
}

.section-head h2{
    font-size:28px;
    color:var(--primary);
    margin-bottom:6px;
}

.section-head p{
    color:var(--muted);
    max-width:760px;
}

.text-center{
    text-align:center;
}

.light{
    background:#eef4ff;
}

/* =========================
   GRID / CARDS
========================= */

.grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px;
}

.card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:22px;
    padding:20px;
    box-shadow:var(--shadow);
}

.card h3{
    color:var(--primary);
    font-size:20px;
    margin-bottom:10px;
}

.card p{
    color:var(--muted);
    margin-bottom:12px;
}

.card a{
    color:var(--primary-2);
    font-weight:700;
}

/* =========================
   ADMIN / FORMS
========================= */

.admin-center{
    max-width:760px;
    margin:0 auto;
}

.admin-panel-card{
    padding:22px;
}

.mt-20{
    margin-top:20px;
}

label{
    display:block;
    margin-top:14px;
    margin-bottom:6px;
    font-weight:700;
    color:var(--text);
}

input[type="text"],
input[type="password"],
input[type="email"],
textarea,
select{
    width:100%;
    padding:12px 14px;
    border:1px solid var(--line);
    border-radius:12px;
    background:#fff;
    color:var(--text);
    outline:none;
    transition:.2s ease;
    font-size:15px;
}

textarea{
    min-height:140px;
    resize:vertical;
}

input:focus,
textarea:focus,
select:focus{
    border-color:var(--primary-2);
    box-shadow:0 0 0 3px rgba(37,99,235,.12);
}

form .btn,
form button{
    margin-top:16px;
}

.status-text{
    color:var(--muted);
    margin-bottom:12px;
}

.secret-label{
    margin-top:14px;
    margin-bottom:6px;
    color:var(--primary);
    font-weight:700;
}

.secret-text{
    word-break:break-all;
    color:var(--muted);
    margin-bottom:14px;
}

/* =========================
   ALERTS
========================= */

.alert-error,
.alert-success{
    padding:12px 14px;
    border-radius:12px;
    margin-bottom:16px;
    font-weight:700;
}

.alert-error{
    background:var(--danger-bg);
    color:var(--danger);
}

.alert-success{
    background:var(--success-bg);
    color:var(--success);
}

/* =========================
   LOGIN BOX
========================= */

.admin-login-body{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    padding:24px;
}

.login-box{
    width:100%;
    max-width:500px;
    background:#fff;
    border-radius:22px;
    box-shadow:0 14px 40px rgba(0,0,0,.16);
    padding:26px;
}

.login-box h1,
.login-box h2,
.login-box h3{
    color:var(--primary);
    margin-bottom:10px;
}

.login-box p{
    color:var(--muted);
    margin-bottom:14px;
}

/* =========================
   QR
========================= */

.qr-box{
    margin:18px 0;
    text-align:center;
}

.qr-box p{
    margin-bottom:10px;
}

.qr-box img{
    max-width:220px;
    margin:0 auto;
    border:1px solid var(--line);
    border-radius:14px;
    background:#fff;
    padding:8px;
}

/* =========================
   FOOTER
========================= */

footer{
    padding:26px 0 36px;
    color:var(--muted);
    font-size:14px;
}

.footer-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    flex-wrap:wrap;
    border-top:1px solid var(--line);
    padding-top:18px;
}

/* =========================
   TABLE
========================= */

.table-wrap{
    overflow:auto;
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    box-shadow:var(--shadow);
}

table{
    width:100%;
    border-collapse:collapse;
}

th,
td{
    padding:14px;
    text-align:left;
    border-bottom:1px solid var(--line);
    vertical-align:top;
}

th{
    background:#f8fafc;
    color:var(--primary);
    font-size:14px;
}

tr:last-child td{
    border-bottom:none;
}

/* =========================
   MOBILE
========================= */

@media (max-width:920px){
    .hero-inner{
        grid-template-columns:1fr;
    }

    .grid{
        grid-template-columns:repeat(2,1fr);
    }
}

@media (max-width:640px){
    .nav{
        flex-direction:column;
        align-items:flex-start;
    }

    .menu{
        width:100%;
        justify-content:flex-start;
        gap:8px;
    }

    .menu a{
        padding:8px 10px;
        font-size:13px;
    }

    .hero{
        padding-top:18px;
    }

    .hero-content,
    .hero-box,
    .card,
    .login-box{
        border-radius:20px;
    }

    .hero-content{
        padding:22px;
    }

    .hero-box{
        padding:20px;
    }

    .hero-content h2{
        font-size:30px;
    }

    .section{
        padding:22px 0;
    }

    .section-head h2{
        font-size:24px;
    }

    .grid{
        grid-template-columns:1fr;
    }

    .admin-center{
        max-width:100%;
    }

    .admin-panel-card{
        padding:18px;
    }

    .login-box{
        padding:22px;
    }

    .btn,
    button{
        width:100%;
    }

    .hero-buttons{
        flex-direction:column;
    }

    .footer-wrap{
        flex-direction:column;
        align-items:flex-start;
    }
}