/* ===================================================================
   Student Election Voting System — stylesheet
   Pure CSS, responsive, no external libraries.
   =================================================================== */

:root {
  --primary:        #0f4c81;   /* school blue */
  --primary-dark:   #0a3454;
  --primary-light:  #e8f0f8;
  --accent:         #f5a623;   /* warm gold accent */
  --success:        #1f9d55;
  --success-light:  #e6f4ec;
  --warning:        #d97706;
  --warning-light:  #fdf3e2;
  --error:          #b91c1c;
  --error-light:    #fdeaea;
  --neutral-900:    #1f2937;
  --neutral-700:    #374151;
  --neutral-500:    #6b7280;
  --neutral-300:    #d1d5db;
  --neutral-200:    #e5e7eb;
  --neutral-100:    #f3f4f6;
  --neutral-50:     #f9fafb;
  --white:          #ffffff;
  --sidebar-w:      260px;
  --radius:         10px;
  --radius-sm:      6px;
  --shadow:         0 1px 3px rgba(0,0,0,.08), 0 4px 14px rgba(0,0,0,.04);
  --shadow-lg:      0 8px 30px rgba(0,0,0,.12);
  --transition:     .18s ease;
}

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

html, body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--neutral-900);
  background: var(--neutral-100);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 600; color: var(--neutral-900); }

/* ---------- Layout shell ---------- */
.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #cdddf0;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.sidebar .brand {
  padding: 22px 20px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.12);
  letter-spacing: .2px;
}
.sidebar .brand small { display:block; font-weight:400; font-size:12px; opacity:.8; margin-top:2px;}
.sidebar nav { padding: 12px 0; flex: 1; }
.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  color: #cdddf0;
  text-decoration: none;
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: background var(--transition), color var(--transition);
}
.sidebar nav a:hover { background: rgba(255,255,255,.08); color:#fff; text-decoration:none; }
.sidebar nav a.active { background: rgba(255,255,255,.14); color:#fff; border-left-color: var(--accent); font-weight:600; }
.sidebar nav a .ic { width:18px; text-align:center; opacity:.9; }
.sidebar .side-foot { padding:14px 20px; font-size:12px; opacity:.7; border-top:1px solid rgba(255,255,255,.12); }

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.topbar {
  background: var(--white);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 20;
}
.topbar h1 { font-size: 19px; }
.topbar .user-chip { font-size:13px; color: var(--neutral-500); }
.topbar .user-chip strong { color: var(--neutral-900); }
.topbar .hamburger { display:none; background:none; border:none; font-size:22px; cursor:pointer; color: var(--primary); }

.content { padding: 24px; max-width: 1280px; width: 100%; }

/* ---------- Cards / panels ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}
.card h2 { font-size: 17px; margin-bottom: 14px; }
.card h3 { font-size: 15px; margin-bottom: 10px; }

.grid { display: grid; gap: 18px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- Stat tiles ---------- */
.stat {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  border-top: 4px solid var(--primary);
}
.stat.alt-2 { border-top-color: var(--accent); }
.stat.alt-3 { border-top-color: var(--success); }
.stat.alt-4 { border-top-color: var(--warning); }
.stat .label { font-size: 12px; color: var(--neutral-500); text-transform: uppercase; letter-spacing:.06em; }
.stat .value { font-size: 28px; font-weight: 700; margin-top: 4px; color: var(--neutral-900); }
.stat .sub { font-size: 12px; color: var(--neutral-500); margin-top: 2px; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--white);
}
table.data th, table.data td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--neutral-200);
}
table.data th {
  background: var(--neutral-50);
  font-weight: 600;
  color: var(--neutral-700);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
table.data tr:hover td { background: var(--primary-light); }
table.data td.num, table.data th.num { text-align: right; }
table.data .rank-1 { font-weight:700; color: var(--success); }
table.data .lead-badge {
  display:inline-block; background: var(--success-light); color: var(--success);
  font-size:11px; font-weight:700; padding:2px 8px; border-radius: 999px; margin-left:6px;
}

/* ---------- Forms ---------- */
.form-row { margin-bottom: 14px; }
.form-row label { display:block; font-weight:600; font-size:13px; margin-bottom:5px; color: var(--neutral-700); }
.form-row .req { color: var(--error); }
input[type=text], input[type=password], input[type=email], input[type=date],
input[type=datetime-local], input[type=number], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,76,129,.15);
}
textarea { min-height: 90px; resize: vertical; }
.hint { font-size: 12px; color: var(--neutral-500); margin-top: 4px; }
.form-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
  font-family: inherit;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger  { background: var(--error); color: #fff; }
.btn-ghost   { background: var(--neutral-100); color: var(--neutral-700); }
.btn-ghost:hover { background: var(--neutral-200); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn[disabled] { opacity:.55; cursor: not-allowed; transform:none; }

.form-actions { margin-top: 18px; display:flex; gap: 10px; }

/* ---------- Badges ---------- */
.badge {
  display:inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
}
.badge-active   { background: var(--success-light); color: var(--success); }
.badge-inactive { background: var(--neutral-100); color: var(--neutral-500); }
.badge-voted    { background: var(--success-light); color: var(--success); }
.badge-notvoted { background: var(--warning-light); color: var(--warning); }
.badge-closed   { background: var(--error-light); color: var(--error); }
.badge-upcoming { background: var(--warning-light); color: var(--warning); }
.badge-ongoing  { background: var(--success-light); color: var(--success); }
.badge-ended    { background: var(--neutral-100); color: var(--neutral-500); }

/* ---------- Flash ---------- */
.flash {
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px;
  font-size: 14px; border: 1px solid transparent;
}
.flash-success { background: var(--success-light); color: var(--success); border-color:#bfe6cf; }
.flash-error   { background: var(--error-light); color: var(--error); border-color:#f3c3c3; }
.flash-info    { background: var(--primary-light); color: var(--primary-dark); border-color:#cfe0f0; }

/* ---------- Candidate cards (voter side) ---------- */
.position-block { margin-bottom: 30px; }
.position-block > h2 {
  font-size: 18px;
  padding-bottom: 8px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--neutral-200);
  display: flex; align-items: center; justify-content: space-between;
}
.position-block .slot-note { font-size: 13px; font-weight:400; color: var(--neutral-500); }
.candidate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}
.candidate-card {
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
}
.candidate-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.candidate-card.selected { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(15,76,129,.18); }
.candidate-card .photo {
  width: 110px; height: 110px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--neutral-200); margin: 0 auto 10px; display:block; background: var(--neutral-100);
}
.candidate-card .cname { font-weight: 600; font-size: 15px; margin-bottom: 2px; }
.candidate-card .cpos  { font-size: 12px; color: var(--primary); font-weight:600; margin-bottom: 4px; }
.candidate-card .cmeta { font-size: 12px; color: var(--neutral-500); }
.candidate-card .cplatform { font-size: 12px; color: var(--neutral-700); margin-top: 8px; min-height: 32px; }
.candidate-card .pick { margin-top: 12px; }

/* ---------- Candidate list table photo ---------- */
.thumb {
  width: 42px; height: 42px; border-radius: 50%; object-fit: cover;
  border: 1px solid var(--neutral-200); background: var(--neutral-100); vertical-align: middle;
}

/* ---------- Charts (pure CSS) ---------- */
.chart-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 13px; }
.chart-row .lbl { width: 160px; flex-shrink:0; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.chart-bar-wrap { flex: 1; background: var(--neutral-100); border-radius: 999px; height: 22px; overflow:hidden; }
.chart-bar {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary) 100%);
  transition: width .4s ease;
  min-width: 2px;
}
.chart-bar.lead { background: linear-gradient(90deg, var(--success) 0%, #2bb673 100%); }
.chart-row .val { width: 50px; text-align:right; font-weight: 600; }

/* Donut (pure CSS conic-gradient) */
.donut {
  width: 160px; height: 160px; border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  background: var(--neutral-100);
}
.donut .hole {
  width: 96px; height: 96px; border-radius:50%; background: var(--white);
  display:flex; align-items:center; justify-content:center; flex-direction:column;
  font-size: 12px; color: var(--neutral-500);
}
.donut .hole strong { font-size: 22px; color: var(--neutral-900); }

.legend { display:flex; flex-wrap:wrap; gap: 10px 18px; margin-top: 10px; font-size: 12px; }
.legend .item { display:flex; align-items:center; gap:6px; }
.legend .swatch { width: 12px; height: 12px; border-radius: 3px; }

/* ---------- Bar chart vertical ---------- */
.vbar-chart { display:flex; align-items: flex-end; gap: 14px; height: 180px; padding-top: 10px; }
.vbar { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:flex-end; height:100%; }
.vbar .bar {
  width: 60%; max-width: 56px; background: var(--primary);
  border-radius: 6px 6px 0 0; transition: height .4s ease; min-height: 3px;
}
.vbar .bar.lead { background: var(--success); }
.vbar .num { font-size: 12px; font-weight: 600; margin-bottom: 4px; }
.vbar .name { font-size: 11px; margin-top: 6px; text-align:center; color: var(--neutral-500); height: 30px; overflow:hidden; }

/* ---------- Auth pages ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 20px;
}
.auth-card {
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  padding: 32px;
}
.auth-card .auth-logo {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--primary); color:#fff; margin: 0 auto 14px;
  display:flex; align-items:center; justify-content:center; font-size: 26px; font-weight: 700;
}
.auth-card h1 { text-align:center; font-size: 20px; margin-bottom: 4px; }
.auth-card .sub { text-align:center; color: var(--neutral-500); font-size: 13px; margin-bottom: 22px; }
.auth-tabs { display:flex; gap: 10px; margin-bottom: 20px; }
.auth-tabs a {
  flex: 1; text-align:center; padding: 9px; border-radius: var(--radius-sm);
  background: var(--neutral-100); color: var(--neutral-700); font-weight:600; font-size: 14px;
}
.auth-tabs a.active { background: var(--primary); color:#fff; }

/* ---------- Confirm modal (pure CSS/PHP) ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15,23,42,.55);
  display: flex; align-items:center; justify-content:center; z-index: 100; padding: 20px;
}
.modal {
  background:#fff; border-radius: 14px; max-width: 460px; width:100%; padding: 26px;
  box-shadow: var(--shadow-lg); text-align:center;
}
.modal h3 { margin-bottom: 10px; }
.modal p { color: var(--neutral-700); margin-bottom: 18px; }
.modal .actions { display:flex; gap:10px; justify-content:center; }

/* ---------- Misc helpers ---------- */
.text-center { text-align:center; }
.muted { color: var(--neutral-500); }
.mt-0 { margin-top:0; } .mt-1 { margin-top:8px; } .mt-2 { margin-top:16px; } .mt-3 { margin-top:24px; }
.mb-0 { margin-bottom:0; } .mb-2 { margin-bottom:16px; }
.empty { padding: 40px 20px; text-align:center; color: var(--neutral-500); }
.flex-between { display:flex; justify-content:space-between; align-items:center; gap: 12px; flex-wrap: wrap; }
.filter-bar { display:flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 18px; }
.filter-bar .form-row { margin-bottom:0; }
.actions-cell { white-space: nowrap; }
.actions-cell a { margin-right: 6px; }

.progress-wrap { background: var(--neutral-200); border-radius:999px; height: 14px; overflow:hidden; }
.progress-bar { height:100%; background: var(--success); border-radius:999px; transition: width .4s; }

.confirm-banner {
  background: var(--primary-light); border:1px solid #cfe0f0;
  border-radius: var(--radius); padding: 16px 18px; margin-bottom: 18px;
}
.confirm-banner strong { color: var(--primary-dark); }

.ballot-summary {
  background: var(--neutral-50); border:1px dashed var(--neutral-300);
  border-radius: var(--radius); padding: 16px; margin-bottom: 16px;
}
.ballot-summary ul { list-style: none; }
.ballot-summary li { padding: 4px 0; border-bottom: 1px solid var(--neutral-200); }
.ballot-summary li:last-child { border-bottom:none; }
.ballot-summary .pos { font-weight:600; color: var(--neutral-700); }

.success-hero {
  text-align:center; padding: 40px 20px;
}
.success-hero .check {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--success-light); color: var(--success);
  display:flex; align-items:center; justify-content:center;
  font-size: 40px; margin: 0 auto 16px; font-weight: 700;
}
.success-hero h1 { color: var(--success); margin-bottom: 8px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .sidebar {
    position: fixed; left: 0; top: 0; z-index: 50;
    transform: translateX(-100%); transition: transform var(--transition);
  }
  .sidebar.open { transform: translateX(0); }
  .topbar .hamburger { display: inline-block; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .content { padding: 16px; }
  .topbar { padding: 12px 16px; }
  .topbar h1 { font-size: 17px; }
  .candidate-grid { grid-template-columns: 1fr 1fr; }
  .chart-row .lbl { width: 110px; }
  .auth-card { padding: 24px; }
}
@media (max-width: 420px) {
  .candidate-grid { grid-template-columns: 1fr; }
}

/* Mobile sidebar overlay */
.overlay {
  display:none; position: fixed; inset:0; background: rgba(0,0,0,.4); z-index: 40;
}
.overlay.show { display:block; }