/* ========================================
   Student Dashboard Styles
   Mobile-First Design
   ======================================== */

.auth-check-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 16px;
  color: var(--gray);
  font-size: 14px;
}

.student-app {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--bg);
  position: relative;
}

/* Header */
.student-header {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-brand { display: flex; align-items: center; gap: 10px; }
.header-logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; color: white;
}
.header-brand span { font-size: 15px; font-weight: 700; color: white; }
.header-user { display: flex; align-items: center; gap: 10px; }

/* Welcome Section */
.student-welcome {
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  padding: 24px 20px 20px;
  color: white;
  position: relative;
  overflow: hidden;
}
.student-welcome::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(79,70,229,0.15);
}
.welcome-avatar-wrap { position: relative; display: inline-block; margin-bottom: 12px; }
.welcome-avatar { width: 60px; height: 60px; border-radius: 50%; border: 3px solid rgba(255,255,255,0.3); object-fit: cover; }
.online-indicator {
  position: absolute;
  bottom: 2px; right: 2px;
  width: 14px; height: 14px;
  background: var(--success);
  border-radius: 50%;
  border: 2px solid var(--dark);
}
.welcome-text h2 { font-size: 1.2rem; font-weight: 800; color: white; margin-bottom: 4px; }
.welcome-text p { font-size: 13px; color: rgba(255,255,255,0.5); }

/* Overview Stats */
.attendance-overview {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 14px;
  padding: 14px;
  margin-top: 16px;
  gap: 0;
  position: relative;
  z-index: 1;
}
.overview-stat { flex: 1; text-align: center; }
.ov-value { font-size: 1.5rem; font-weight: 900; line-height: 1; }
.ov-label { font-size: 11px; color: rgba(255,255,255,0.4); margin-top: 3px; font-weight: 500; }
.ov-divider { width: 1px; height: 36px; background: rgba(255,255,255,0.1); }

/* Nav Tabs */
.student-nav-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: white;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 64px;
  z-index: 40;
}
.s-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--gray);
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
  font-family: var(--font);
}
.s-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-icon { font-size: 1.2rem; }

/* Tab Content */
.tab-content { padding: 16px; display: flex; flex-direction: column; gap: 0; }
.tab-pane { display: flex; flex-direction: column; gap: 16px; }

/* Home Tab */
.home-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.action-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  border: 1.5px solid var(--border);
  cursor: pointer;
  transition: all 0.25s;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.action-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.scan-action { border-color: rgba(79,70,229,0.2); background: linear-gradient(145deg, rgba(79,70,229,0.04), white); }
.scan-action:hover { border-color: var(--primary); }
.records-action { border-color: rgba(16,185,129,0.2); background: linear-gradient(145deg, rgba(16,185,129,0.04), white); }
.records-action:hover { border-color: var(--success); }
.action-icon { font-size: 2.2rem; margin-bottom: 10px; }
.action-card h3 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.action-card p { font-size: 12px; color: var(--gray); }
.action-arrow { position: absolute; bottom: 12px; right: 14px; color: var(--gray-light); font-size: 1rem; }

/* Quick Stats */
.quick-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.qstat-card { background: white; border-radius: var(--radius); padding: 14px 10px; text-align: center; border: 1px solid var(--border); }
.qstat-label { font-size: 10px; font-weight: 600; color: var(--gray); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 6px; }
.qstat-value { font-size: 1.6rem; font-weight: 900; color: var(--text); line-height: 1; }
.qstat-sub { font-size: 10px; color: var(--gray-light); margin-top: 3px; }

/* Scan Steps */
.scan-step { display: flex; flex-direction: column; gap: 16px; }
.scan-title { font-size: 1.2rem; font-weight: 800; color: var(--text); text-align: center; }
.scan-desc { font-size: 13.5px; color: var(--gray); text-align: center; line-height: 1.6; }
.step-indicator { text-align: center; }
.step-badge { display: inline-block; background: var(--primary); color: white; font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 20px; margin-bottom: 10px; }

/* QR Scan Box */
.qr-scan-box { width: 100%; background: var(--dark); border-radius: 16px; overflow: hidden; min-height: 260px; position: relative; }
.qr-placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; color: rgba(255,255,255,0.5); font-size: 14px; }
.qr-placeholder-icon { font-size: 3rem; }

/* Scan separator */
.scan-separator { text-align: center; color: var(--gray-light); font-size: 12px; font-weight: 600; position: relative; }
.scan-separator::before, .scan-separator::after { content: ''; position: absolute; top: 50%; width: 35%; height: 1px; background: var(--border); }
.scan-separator::before { left: 0; }
.scan-separator::after { right: 0; }

/* Session info */
.session-info-card { background: rgba(79,70,229,0.05); border: 1px solid rgba(79,70,229,0.15); border-radius: 14px; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.sinfo-item { font-size: 13.5px; color: var(--text); display: flex; align-items: center; gap: 8px; }

/* Verification Checklist */
.verification-checklist { display: flex; flex-direction: column; gap: 10px; background: #F8FAFC; border-radius: 12px; padding: 16px; }
.check-item { display: flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 500; color: var(--text); }
.check-item.done { color: var(--success); }
.check-item.failed { color: var(--danger); }
.check-item.loading { color: var(--warning); }

/* Records Tab */
.records-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.records-header h2 { font-size: 1rem; font-weight: 800; }
.records-filter select { width: auto; font-size: 13px; padding: 6px 28px 6px 10px; }
.records-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 12px; }
.rsummary-card { background: white; border-radius: 12px; padding: 14px 10px; text-align: center; border: 1.5px solid var(--border); }
.rsummary-card.green { border-color: rgba(16,185,129,0.3); background: rgba(16,185,129,0.05); }
.rsummary-card.red { border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.05); }
.rs-value { font-size: 1.6rem; font-weight: 900; color: var(--text); }
.rs-label { font-size: 11px; color: var(--gray); font-weight: 600; }
.rsummary-card.green .rs-value { color: var(--success); }
.rsummary-card.red .rs-value { color: var(--danger); }
.record-card { display: flex; align-items: center; gap: 14px; background: white; border-radius: 12px; padding: 14px 16px; margin-bottom: 8px; border: 1px solid var(--border); }
.record-status { font-size: 1.4rem; width: 36px; text-align: center; flex-shrink: 0; }
.record-info { flex: 1; min-width: 0; }
.record-subject { font-size: 14px; font-weight: 700; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.record-meta { font-size: 12px; color: var(--gray); margin-top: 2px; }
.form-hint { font-size: 12px; color: var(--gray); margin-top: 5px; }
.form-control-lg { font-size: 18px; padding: 14px; }