:root{
  --primary:#2563eb;
  --primary-dark:#1e40af;
  --primary-light:#dbeafe;
  --bg:#f1f5f9;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --success:#16a34a;
  --danger:#dc2626;
  --warning:#d97706;
  --radius:14px;
  --shadow:0 1px 3px rgba(15,23,42,.08),0 1px 2px rgba(15,23,42,.04);
  --shadow-lg:0 10px 30px rgba(15,23,42,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.55;font-size:15px;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------------- Layout ---------------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:250px;background:#0f172a;color:#cbd5e1;position:fixed;top:0;left:0;bottom:0;
  display:flex;flex-direction:column;padding:0;z-index:20;
}
.sidebar .brand{
  padding:22px 20px;font-size:18px;font-weight:700;color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:10px;
}
.sidebar .brand .logo{
  width:34px;height:34px;border-radius:9px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:16px;flex:0 0 auto;
}
.sidebar nav{padding:14px 12px;flex:1;overflow-y:auto}
.sidebar nav a{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;
  color:#cbd5e1;font-weight:500;margin-bottom:4px;transition:.15s;text-decoration:none;
}
.sidebar nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.sidebar nav a.active{background:var(--primary);color:#fff}
.sidebar nav a .ico{width:20px;text-align:center}
.sidebar nav .section{
  font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:#64748b;
  padding:16px 14px 6px;font-weight:700;
}
.sidebar .foot{padding:14px 16px;border-top:1px solid rgba(255,255,255,.08);font-size:13px}

.main{margin-left:250px;flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{
  background:var(--card);border-bottom:1px solid var(--border);padding:16px 28px;
  display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10;
}
.topbar h1{font-size:20px;font-weight:700}
.topbar .user{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--muted)}
.topbar .user .avatar{
  width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;
}
.content{padding:28px;flex:1}

/* mobile-only nav controls — hidden on desktop */
.hamburger{display:none}
.nav-close{display:none}
.nav-overlay{display:none}

/* ---------------- Cards ---------------- */
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;margin-bottom:22px;
}
.card h2{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.card .sub{color:var(--muted);font-size:13px;margin-top:-10px;margin-bottom:16px}

.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1000px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* Stat cards */
.stat{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.stat .label{color:var(--muted);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.03em}
.stat .value{font-size:28px;font-weight:800;margin-top:8px}
.stat .icon{
  position:absolute;top:18px;right:18px;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;font-size:20px;
  background:var(--primary-light);color:var(--primary);
}
.stat.green .icon{background:#dcfce7;color:var(--success)}
.stat.amber .icon{background:#fef3c7;color:var(--warning)}
.stat.red .icon{background:#fee2e2;color:var(--danger)}

/* ---------------- Tables ---------------- */
table{width:100%;border-collapse:collapse;font-size:14px}
thead th{
  text-align:left;padding:12px 14px;background:#f8fafc;color:var(--muted);
  font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em;
  border-bottom:1px solid var(--border);
}
tbody td{padding:12px 14px;border-bottom:1px solid var(--border)}
tbody tr:hover{background:#f8fafc}
.table-wrap{overflow-x:auto}

/* ---------------- Badges ---------------- */
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.badge.paid{background:#dcfce7;color:#166534}
.badge.unpaid{background:#fee2e2;color:#991b1b}
.badge.cash{background:#fef3c7;color:#92400e}
.badge.bank{background:#dbeafe;color:#1e40af}
.badge.locked{background:#e2e8f0;color:#475569}
.badge.open{background:#dcfce7;color:#166534}

/* ---------------- Forms ---------------- */
.form-row{margin-bottom:16px}
label{display:block;font-weight:600;font-size:13px;margin-bottom:6px}
input[type=text],input[type=password],input[type=number],input[type=email],
input[type=date],select,textarea{
  width:100%;padding:11px 13px;border:1px solid var(--border);border-radius:10px;
  font-size:14px;font-family:inherit;background:#fff;transition:.15s;
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);
}
textarea{resize:vertical;min-height:90px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border:none;
  border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s;
  background:var(--primary);color:#fff;text-decoration:none;
}
.btn:hover{background:var(--primary-dark);text-decoration:none}
.btn.secondary{background:#e2e8f0;color:var(--text)}
.btn.secondary:hover{background:#cbd5e1}
.btn.success{background:var(--success)}
.btn.success:hover{background:#15803d}
.btn.danger{background:var(--danger)}
.btn.danger:hover{background:#b91c1c}
.btn.sm{padding:6px 12px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* ---------------- Flash ---------------- */
.flash{padding:13px 18px;border-radius:10px;margin-bottom:18px;font-weight:500;font-size:14px}
.flash.success{background:#dcfce7;color:#166534;border:1px solid #86efac}
.flash.error{background:#fee2e2;color:#991b1b;border:1px solid #fca5a5}
.flash.info{background:#dbeafe;color:#1e40af;border:1px solid #93c5fd}

/* ---------------- Login ---------------- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);padding:20px}
.auth-card{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);
  width:100%;max-width:410px;padding:38px 34px}
.auth-card .logo-lg{width:60px;height:60px;border-radius:16px;background:var(--primary);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;
  margin:0 auto 18px}
.auth-card h1{text-align:center;font-size:22px;margin-bottom:4px}
.auth-card .sub{text-align:center;color:var(--muted);margin-bottom:26px;font-size:14px}

/* ---------------- Public landing / gallery ---------------- */
.landing-hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  color:#fff;padding:60px 24px 70px;text-align:center}
.landing-hero h1{font-size:38px;font-weight:800;margin-bottom:10px}
.landing-hero p{font-size:17px;opacity:.9;max-width:640px;margin:0 auto 26px}
.landing-nav{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;
  align-items:center;padding:18px 32px}
.landing-nav .brand{color:#fff;font-weight:700;font-size:18px}
.gallery-section{max-width:1150px;margin:0 auto;padding:44px 24px}
.year-block{margin-bottom:44px}
.year-block h2{font-size:24px;margin-bottom:6px;display:inline-block;
  border-bottom:3px solid var(--primary);padding-bottom:4px}
.fest-name{color:var(--muted);font-size:14px;margin:10px 0 14px;font-weight:600}
.img-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.img-grid .ph{position:relative;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);
  aspect-ratio:4/3;background:#e2e8f0}
.img-grid .ph img{width:100%;height:100%;object-fit:cover;display:block;transition:.3s}
.img-grid .ph:hover img{transform:scale(1.05)}
.img-grid .ph .cap{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.75));
  color:#fff;padding:22px 12px 10px;font-size:13px;font-weight:500}
.empty{text-align:center;color:var(--muted);padding:50px 20px}
.empty .big{font-size:44px;margin-bottom:12px}

/* helpers */
.muted{color:var(--muted)}
.right{text-align:right}
.center{text-align:center}
.mb0{margin-bottom:0}
.mt{margin-top:18px}
.flex-between{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.pill-total{font-size:15px;font-weight:700}
.divider{height:1px;background:var(--border);margin:20px 0}
.hint{font-size:12px;color:var(--muted);margin-top:5px}
.locked-note{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;
  padding:12px 16px;border-radius:10px;font-size:14px;margin-bottom:16px;font-weight:500}

/* ---------------- Modal ---------------- */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(15,23,42,.55);
  z-index:50;align-items:center;justify-content:center;padding:20px}
.modal-overlay.show{display:flex}
.modal{background:#fff;border-radius:16px;box-shadow:var(--shadow-lg);width:100%;
  max-width:440px;padding:26px;animation:pop .15s ease}
@keyframes pop{from{transform:scale(.96);opacity:0}to{transform:scale(1);opacity:1}}
.modal h3{font-size:18px;margin-bottom:4px}
.modal .who{color:var(--muted);font-size:14px;margin-bottom:18px}
.mode-choices{display:flex;gap:12px;margin-top:6px}
.mode-choices label{flex:1;border:2px solid var(--border);border-radius:12px;padding:14px;
  text-align:center;cursor:pointer;font-weight:600;transition:.15s;margin:0}
.mode-choices input{display:none}
.mode-choices input:checked + span{color:var(--primary)}
.mode-choices label:has(input:checked){border-color:var(--primary);background:var(--primary-light)}

/* ================= Mobile / Tablet ================= */
@media(max-width:900px){
  /* sidebar becomes an off-canvas drawer */
  .sidebar{
    transform:translateX(-100%);
    transition:transform .25s ease;
    width:270px;max-width:82vw;box-shadow:4px 0 24px rgba(0,0,0,.35);
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar .brand{position:relative;padding-right:52px}
  .nav-close{
    display:flex;align-items:center;justify-content:center;
    position:absolute;right:14px;top:50%;transform:translateY(-50%);
    width:34px;height:34px;border:none;border-radius:9px;cursor:pointer;
    background:rgba(255,255,255,.12);color:#fff;font-size:15px;
  }

  /* dark overlay behind the open drawer */
  .nav-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:19}
  .nav-overlay.show{display:block}

  /* main content spans full width; hamburger appears in topbar */
  .main{margin-left:0}
  .hamburger{
    display:flex;align-items:center;justify-content:center;
    width:42px;height:42px;border:none;border-radius:11px;cursor:pointer;
    background:#0f172a;color:#fff;font-size:20px;flex:0 0 auto;margin-right:12px;
  }
  .topbar{padding:12px 16px;gap:8px}
  .topbar h1{font-size:18px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  /* trim the user block so it fits: keep avatar + logout, hide the long name */
  .topbar .user{gap:8px}
  .topbar .user > span{display:none}

  .content{padding:18px 14px}

  /* tables scroll sideways instead of squashing */
  .table-wrap{ -webkit-overflow-scrolling:touch }
  .table-wrap table{min-width:560px}

  .stat .value{font-size:24px}
  .card{padding:18px}

  /* public landing page */
  .landing-nav{position:static;padding:16px 18px;background:var(--primary-dark)}
  .landing-hero{padding:34px 18px 44px}
  .landing-hero h1{font-size:27px}
  .landing-hero p{font-size:15px}
  .gallery-section{padding:28px 16px}
  .year-block h2{font-size:20px}
  .img-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
}

@media(max-width:520px){
  .landing-nav{flex-wrap:wrap;gap:10px}
  .img-grid{grid-template-columns:1fr 1fr}
  .content{padding:14px 12px}
  .topbar h1{font-size:16px}
  .stat .value{font-size:22px}
  /* stack action button rows full-width for easy tapping */
  .btn-row .btn{flex:1 1 auto;text-align:center}
}