:root {
    --bg-start: #0f1a12;
    --bg-end:   #0a0f0a;
    --card-bg:  #0c120d;
    --input-bg: #0a0e0b;
    --border:   #c026d3;
    --accent:   #d946ef;
    --accent-dark: #b91cf5;
    --text:     #ffffff;
    --text-dim: #d1a8ff;
    --glow:     rgba(192, 38, 211, 0.25);
    --glow-strong: rgba(217, 70, 239, 0.4);
}

* { box-sizing: border-box; }

body {
    background: radial-gradient(ellipse at bottom, var(--bg-start) 0%, var(--bg-end) 100%);
    color: var(--text);
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 2rem;
    padding-top: 4rem;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Announcement Bar */
.announcement-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(44, 1, 44, 0.45);   
    color: #ffffff;
    text-align: center;
    padding: 0.75rem;
    z-index: 1000;
    font-size: 1rem;
    border-bottom: 1px solid rgba(192, 38, 211, 0.18);   
    backdrop-filter: blur(6px);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.logo-text {
  font-size: 2.8rem;
  margin: 0;
  line-height: 1;
  text-align: center;
  font-weight: 800;

  background: linear-gradient(90deg, #d946ef, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;

  text-shadow: 0 0 15px rgba(217, 70, 239, 0.6);
}

/* Stars */
.stars {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}

.star {
    position: absolute;
    background: #ffffff;
    border-radius: 50%;
    opacity: 0.75;
    animation: twinkle 4.5s infinite alternate;
    box-shadow: 0 0 8px 2px rgba(255, 255, 255, 0.5);
}

@keyframes twinkle {
    0%   { opacity: 0.45; transform: scale(0.85); }
    100% { opacity: 0.95; transform: scale(1.15); }
}

.container {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Header */
.header-titles h1 {
    font-size: 2.8rem;
    margin: 0;
    background: linear-gradient(90deg, var(--accent-dark), var(--accent), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.menu-toggle {
    padding: 0.6rem 0.9rem;
    border-radius: 0.5rem;
    color: #ffffff;
    cursor: pointer;
    border: none;
    font-size: 1.6rem;
    background: transparent;
    transition: all 0.25s ease;
}

.menu-toggle:hover {
    color: var(--accent);
    text-shadow: 0 0 12px var(--glow);
    transform: scale(1.1);
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

input, select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    background: var(--input-bg);
    color: #ffffff;
    font-size: 1rem;
    width: 200px;
    max-width: 100%;
    transition: all 0.25s ease;
}

input:focus, select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--glow);
    outline: none;
}

button {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    color: #ffffff;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    min-width: 120px;
    transition: all 0.25s ease;
}

.bg-blue-600  { background-color: #2563eb; }
.bg-blue-600:hover  { background-color: #1d4ed8; }
.bg-red-600   { background-color: #dc2626; }
.bg-red-600:hover   { background-color: #b91c1c; }
.bg-green-600 { background-color: #16a34a; }
.bg-green-600:hover { background-color: #15803d; }

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.subject-section, .overall-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 0.75rem;
    min-height: 280px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    box-shadow: 0 8px 25px rgba(0,0,0,0.5), 0 0 20px var(--glow);
    backdrop-filter: blur(6px);
}

.subject-section:hover, .overall-section:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.6), 0 0 30px var(--glow-strong);
    background: #1a2520;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.2rem;
    color: #ffffff;
}

.quiz-list {
    list-style: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

.quiz-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    background: rgba(192, 38, 211, 0.08);
    border: 1px solid rgba(192, 38, 211, 0.3);
    border-radius: 0.375rem;
}

.average-display {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1rem 0;
    color: var(--accent);
}

.chart-container {
    position: relative;
    margin: 1.5rem auto 0;
    height: 210px;
    width: 210px;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 3rem;
    left: -250px;
    width: 250px;
    height: calc(100% - 3rem);
    background: rgba(12, 18, 13, 0.95);
    backdrop-filter: blur(18px);
    padding: 1rem 0;
    transition: left 0.3s ease;
    z-index: 999;
    border-right: 1px solid rgba(192, 38, 211, 0.18);
    box-shadow: 0 0 25px rgba(192, 38, 211, 0.12);
    display: flex;
    flex-direction: column;
}

.sidebar.open {
    left: 0;
}

.sidebar a {
    color: rgba(255,255,255,0.94);
    padding: 0.9rem 1.2rem;
    text-decoration: none;
    display: block;
    transition: all 0.2s;
    background: rgba(192, 38, 211, 0.02);
    margin: 0 0.6rem 0.2rem;
    border-radius: 8px;
}

.sidebar a:hover {
    background: rgba(192, 38, 211, 0.14);
}

/* Responsive */
@media (max-width: 768px) {
    .controls {
        flex-direction: column;
        align-items: center;
    }
    input, select, button {
        width: 100%;
        max-width: 320px;
        margin-bottom: 0.6rem;
    }
    .grid {
        grid-template-columns: 1fr;
    }
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1rem;
        padding-top: 3.5rem;
    }
    h1 { font-size: 2.1rem; }
}


/* Sidebar Header with Close Button */
.sidebar-header {
    position: relative;
    padding: 0.8rem 1rem;
    font-weight: bold;
    color: var(--accent);
    border-bottom: 1px solid rgba(192,38,211,0.3);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-header span {
    flex: 1;
}

/* Close button styling – بسيط جدًا */
/* الإعدادات الأساسية للزر */
.sidebar-close {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.8rem;           /* حجم افتراضي متوسط */
    font-weight: 300;
    line-height: 1;
    cursor: pointer;
    padding: 0.4rem 1rem;        /* مساحة داخلية كويسة للضغط */
    position: absolute;
    right: 0.3rem;               /* قريب جدًا من الحافة اليمين */
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.75;
    transition: all 0.2s ease;
}

/* على الشاشات الكبيرة (كمبيوتر، تابلت كبير) → حجم أصغر */
@media (min-width: 992px) {
    .sidebar-close {
        font-size: 1.9rem;       /* أصغر شوية */
        padding: 0.3rem 0.8rem;
        right: -2rem;
    }
}

/* على الموبايل والشاشات الصغيرة → حجم أكبر لسهولة الضغط */
@media (max-width: 991px) {
    .sidebar-close {
        font-size: 2.4rem;       /* كبير وواضح */
        padding: 0.6rem 1.2rem;  /* مساحة أكبر حوالين الرمز */
        right: -6rem;           /* أقرب للحافة عشان يبان أكتر */
    }
}

/* التأثير عند الـ hover أو التركيز */
.sidebar-close:hover,
.sidebar-close:focus {
    opacity: 1;
    color: var(--accent);
    transform: translateY(-50%) scale(1.18);
    text-shadow: 0 0 10px var(--glow);
}