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

:root{
  --pmu-blue:#003366;
  --pmu-gold:#FFD700;
  --dark-bg:#111827;
  --dark-card:#1f2937;
  --text:#e5e7eb;
}

body{
  font-family:'Inter',sans-serif;
  background-color:var(--dark-bg);
  color:var(--text);
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.05) 1px, transparent 0);
  background-size:20px 20px;
}

.font-mono{ font-family:'Roboto Mono', monospace; }

.glass-card{
  background: rgba(31, 41, 55, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.page-content{ animation: fadeIn 0.5s ease-in-out; }
@keyframes fadeIn{
  from{opacity:0; transform: translateY(20px);}
  to{opacity:1; transform: translateY(0);}
}

.gradient-text{
  background: linear-gradient(90deg, var(--pmu-gold), #fde68a);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.btn-primary{
  font-weight: 800;
  padding: 12px 24px;
  border-radius: 12px;
  transition: all .3s ease;
  transform: translateZ(0);
  box-shadow: 0 10px 18px rgba(0,0,0,.35);
  background: linear-gradient(90deg, var(--pmu-blue), #1e40af);
  color:#fff;
}
.btn-primary:hover{ transform: scale(1.03); box-shadow: 0 12px 24px rgba(59,130,246,.25); }

.btn-secondary{
  font-weight: 800;
  padding: 12px 24px;
  border-radius: 12px;
  transition: all .3s ease;
  box-shadow: 0 10px 18px rgba(0,0,0,.35);
  background: rgba(107,114,128,0.75);
  color:#fff;
}
.btn-secondary:hover{ background: rgba(107,114,128,0.95); transform: scale(1.03); }

/* =========================
   ✅ NAV (مرتب + spacing + ما يلخبط)
   ========================= */
.nav-shell{
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(17, 24, 39, 0.55);
  border: 1px solid rgba(255,255,255,0.08);
}

.nav-link{
  display:flex;
  align-items:center;
  gap: 10px;

  padding: 10px 14px;
  border-radius: 14px;

  color: rgba(229,231,235,0.92);
  text-decoration:none;

  transition: all .2s ease;
  white-space: nowrap;       /* يمنع تكسير الكلمات */
  line-height: 1;
}

.nav-link i{ width:18px; height:18px; }

.nav-link span{
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .2px;
}

.nav-link:hover{
  background: rgba(0,51,102,0.85);
  color:#fff;
  transform: translateY(-1px);
}

.nav-link.active{
  background: rgba(0,51,102,1);
  color:#fff;
  box-shadow: 0 10px 22px rgba(0,0,0,.35);
}

/* welcome text طولها ما يخرّب الهيدر */
.welcome-wrap{
  max-width: 320px;
  overflow:hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* challenge icon size */
.challenge-card-icon{ width:24px; height:24px; margin-right:8px; }

/* =============================
   Challenge Detail Page
   ============================= */
.challenge-shell{
  position: relative;
  isolation: isolate;
}
.challenge-shell:before{
  content:"";
  position:absolute;
  inset:-40px;
  z-index:-1;
  background:
    radial-gradient(700px 380px at 15% 10%, rgba(255, 215, 0, 0.16), transparent 60%),
    radial-gradient(620px 360px at 85% 15%, rgba(0, 51, 102, 0.35), transparent 62%),
    radial-gradient(520px 420px at 60% 95%, rgba(124, 58, 237, 0.18), transparent 60%);
  filter: blur(2px);
  pointer-events:none;
}

.hero-card{
  background: linear-gradient(135deg, rgba(31, 41, 55, 0.72), rgba(17, 24, 39, 0.35));
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: 0 16px 40px rgba(0,0,0,0.45);
  backdrop-filter: blur(12px);
}
.hero-badge{
  background: rgba(0, 51, 102, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.10);
}

.ch-stat-card{
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(31, 41, 55, 0.72), rgba(31, 41, 55, 0.40));
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: 0 12px 26px rgba(0,0,0,0.35);
}
.ch-stat-card:before{
  content:"";
  position:absolute;
  inset:-1px;
  background: radial-gradient(520px 220px at 0% 0%, rgba(255, 215, 0, 0.12), transparent 55%);
  pointer-events:none;
}

.difficulty-easy { background: #22c55e; }
.difficulty-medium { background: #f59e0b; }
.difficulty-hard { background: #ef4444; }

.ch-tab-active{
  border-bottom: 2px solid var(--pmu-gold);
  color: var(--pmu-gold);
}
.ch-tab-inactive{
  border-bottom: 2px solid transparent;
  color: #9ca3af;
}

.ch-action-card{
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(31, 41, 55, 0.55), rgba(17, 24, 39, 0.25));
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 14px 34px rgba(0,0,0,0.40);
}
.ch-action-card:before{
  content:"";
  position:absolute;
  inset:-1px;
  background:
    radial-gradient(520px 220px at 0% 0%, rgba(0, 51, 102, 0.22), transparent 55%),
    radial-gradient(460px 200px at 100% 0%, rgba(255, 215, 0, 0.10), transparent 55%);
  pointer-events:none;
}

.ch-submit-section{
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(31, 41, 55, 0.62), rgba(17, 24, 39, 0.30));
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.45);
}
.ch-submit-section:before{
  content:"";
  position:absolute;
  inset:-1px;
  background: radial-gradient(650px 260px at 30% 0%, rgba(255, 215, 0, 0.12), transparent 55%);
  pointer-events:none;
}

.btn-modern{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 14px;
  padding: 10px 16px;
  font-weight: 800;
  letter-spacing: .2px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  transform: translateZ(0);
}
.btn-modern:active{ transform: translateY(1px); }
.btn-blue{
  background: linear-gradient(90deg, var(--pmu-blue), #1e40af);
  color: #fff;
  box-shadow: 0 14px 26px rgba(0,0,0,0.40);
}
.btn-blue:hover{ box-shadow: 0 18px 34px rgba(30, 64, 175, 0.22); transform: translateY(-1px); }
.btn-ghost{
  background: rgba(107,114,128,0.35);
  color:#fff;
  border: 1px solid rgba(255,255,255,0.12);
}
.btn-ghost:hover{ background: rgba(107,114,128,0.55); transform: translateY(-1px); }
.btn-gold{
  background: linear-gradient(90deg, var(--pmu-gold), #fde68a);
  color: #111827;
  box-shadow: 0 16px 30px rgba(255, 215, 0, 0.10);
}
.btn-gold:hover{ box-shadow: 0 22px 40px rgba(255, 215, 0, 0.16); transform: translateY(-1px); }

/* =============================
   Admin Tabs
   ============================= */
.admin-tab-active{
  border-bottom: 2px solid var(--pmu-gold);
  color: var(--pmu-gold);
}
.admin-tab-inactive{
  border-bottom: 2px solid transparent;
  color: #9ca3af;
}
.admin-tab-inactive:hover{ color: #e5e7eb; }

/* =============================
   Mobile Nav
   ============================= */
.mobile-nav-link{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  color: #d1d5db;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}
.mobile-nav-link:hover{
  background: rgba(255, 215, 0, 0.10);
  color: var(--pmu-gold);
}

/* =============================
   Quiz Modal
   ============================= */
.quiz-backdrop{
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(6px);
}
.quiz-card{
  background: #1a2235;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.quiz-option{
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  border: 2px solid rgba(255,255,255,0.08);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  color: #d1d5db;
  font-size: 0.9rem;
}
.quiz-option:hover{ border-color: var(--pmu-gold); background: rgba(255,215,0,0.05); }
.quiz-option.selected{ border-color: var(--pmu-gold); background: rgba(255,215,0,0.10); color:#fff; }
.quiz-option.result-correct{ border-color:#22c55e; background:rgba(34,197,94,0.12); color:#86efac; }
.quiz-option.result-wrong{ border-color:#ef4444; background:rgba(239,68,68,0.10); color:#fca5a5; }

/* =============================
   Level Badges
   ============================= */
.level-badge{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.level-Beginner     { background:rgba(107,114,128,0.3); color:#d1d5db; border:1px solid #6b7280; }
.level-Intermediate { background:rgba(59,130,246,0.2);  color:#93c5fd; border:1px solid #3b82f6; }
.level-Advanced     { background:rgba(234,179,8,0.2);   color:#fde047; border:1px solid #eab308; }
.level-Expert       { background:rgba(239,68,68,0.2);   color:#fca5a5; border:1px solid #ef4444; }

/* =============================
   Trophy Celebration
   ============================= */
@keyframes trophy-pop {
  0% { transform: scale(0) rotate(-10deg); opacity: 0; }
  50% { transform: scale(1.1) rotate(5deg); }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}
@keyframes trophy-shine {
  0%, 100% { filter: brightness(1) drop-shadow(0 0 10px currentColor); }
  50% { filter: brightness(1.3) drop-shadow(0 0 25px currentColor); }
}
@keyframes confetti-fall {
  0% { transform: translateY(-20px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(200px) rotate(720deg); opacity: 0; }
}
.trophy-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(4px);
  animation: fade-in 0.3s ease;
}
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.trophy-card {
  background: linear-gradient(145deg, #1a2235 0%, #0f1520 100%);
  border: 3px solid var(--pmu-gold);
  border-radius: 24px;
  padding: 48px 64px;
  text-align: center;
  position: relative;
  box-shadow: 0 25px 80px rgba(0,0,0,0.8), 0 0 60px rgba(255,215,0,0.15);
  animation: trophy-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.trophy-card.first-blood {
  border-color: #ef4444;
  box-shadow: 0 25px 80px rgba(0,0,0,0.8), 0 0 80px rgba(239,68,68,0.4);
}
.trophy-icon {
  font-size: 80px;
  margin-bottom: 20px;
  animation: trophy-shine 2s ease-in-out infinite;
}
.trophy-card.first-blood .trophy-icon {
  animation: trophy-shine 1s ease-in-out infinite;
  filter: drop-shadow(0 0 15px #ef4444);
}
.trophy-title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 12px;
  background: linear-gradient(90deg, var(--pmu-gold), #fff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.trophy-card.first-blood .trophy-title {
  background: linear-gradient(90deg, #ef4444, #fca5a5);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.trophy-points {
  font-size: 48px;
  font-weight: 900;
  color: var(--pmu-gold);
  margin: 16px 0;
  text-shadow: 0 0 30px rgba(255,215,0,0.3);
}
.trophy-card.first-blood .trophy-points {
  color: #ef4444;
  text-shadow: 0 0 30px rgba(239,68,68,0.4);
}
.trophy-subtitle {
  color: #94a3b8;
  font-size: 16px;
  margin-bottom: 24px;
}
.trophy-first-blood-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, #ef4444, #b91c1c);
  color: white;
  padding: 8px 20px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 24px;
  box-shadow: 0 4px 15px rgba(239,68,68,0.4);
}
.trophy-close-btn {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.2);
  color: #94a3b8;
  padding: 12px 32px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.trophy-close-btn:hover {
  border-color: var(--pmu-gold);
  color: var(--pmu-gold);
  background: rgba(255,215,0,0.1);
}
.trophy-card.first-blood .trophy-close-btn:hover {
  border-color: #ef4444;
  color: #ef4444;
  background: rgba(239,68,68,0.1);
}
.confetti {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: confetti-fall 3s linear infinite;
}
.solved-banner {
  background: linear-gradient(90deg, rgba(34,197,94,0.2), rgba(34,197,94,0.1));
  border: 1px solid rgba(34,197,94,0.4);
  border-radius: 12px;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #86efac;
  font-weight: 600;
}
.first-blood-banner {
  background: linear-gradient(90deg, rgba(239,68,68,0.2), rgba(239,68,68,0.1));
  border: 1px solid rgba(239,68,68,0.4);
  color: #fca5a5;
}

/* =============================
   Toast Notifications
   ============================= */
@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px) scale(0.96); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to   { opacity: 0; transform: translateX(40px) scale(0.96); }
}
@keyframes toast-progress {
  from { width: 100%; }
  to   { width: 0%; }
}

.toast-item {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-width: 300px;
  max-width: 420px;
  padding: 14px 18px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1a2235 0%, #0f1520 100%);
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 16px 48px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.04);
  animation: toast-in 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}
.toast-item.toast-closing {
  animation: toast-out 0.28s ease forwards;
}

.toast-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 1px;
}
.toast-body {
  flex: 1;
  min-width: 0;
}
.toast-title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 2px;
}
.toast-msg {
  font-size: 0.82rem;
  color: #d1d5db;
  line-height: 1.45;
  word-break: break-word;
}
.toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: #6b7280;
  cursor: pointer;
  padding: 2px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.toast-close:hover {
  color: #e5e7eb;
  background: rgba(255,255,255,0.08);
}
.toast-close svg {
  width: 16px;
  height: 16px;
}
.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  border-radius: 0 0 14px 14px;
}

.toast-success { border-left: 4px solid #22c55e; }
.toast-success .toast-icon  { color: #22c55e; }
.toast-success .toast-title { color: #86efac; }
.toast-success .toast-progress { background: #22c55e; }

.toast-error { border-left: 4px solid #ef4444; }
.toast-error .toast-icon  { color: #ef4444; }
.toast-error .toast-title { color: #fca5a5; }
.toast-error .toast-progress { background: #ef4444; }

.toast-warning { border-left: 4px solid #f59e0b; }
.toast-warning .toast-icon  { color: #f59e0b; }
.toast-warning .toast-title { color: #fde68a; }
.toast-warning .toast-progress { background: #f59e0b; }

.toast-info { border-left: 4px solid #3b82f6; }
.toast-info .toast-icon  { color: #3b82f6; }
.toast-info .toast-title { color: #93c5fd; }
.toast-info .toast-progress { background: #3b82f6; }

/* =============================
   Custom Confirm Dialog
   ============================= */
.confirm-backdrop {
  background: rgba(0,0,0,0.70);
  backdrop-filter: blur(6px);
}
.confirm-card {
  background: linear-gradient(145deg, #1a2235 0%, #0f1520 100%);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
  animation: trophy-pop 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.confirm-card .btn-danger {
  background: linear-gradient(90deg, #dc2626, #b91c1c);
  color: #fff;
  box-shadow: 0 8px 20px rgba(220,38,38,0.25);
}
.confirm-card .btn-danger:hover {
  box-shadow: 0 12px 28px rgba(220,38,38,0.35);
  transform: translateY(-1px);
}
.confirm-card .btn-confirm-blue {
  background: linear-gradient(90deg, var(--pmu-blue), #1e40af);
  color: #fff;
  box-shadow: 0 8px 20px rgba(0,51,102,0.25);
}
.confirm-card .btn-confirm-blue:hover {
  box-shadow: 0 12px 28px rgba(30,64,175,0.35);
  transform: translateY(-1px);
}