/*  de kol 7aga f el global mn varaibles & colors & radius & fonts 
    w el structure tb2a clean 3shan el team y3rf ykaml 3aleha  */ 

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
}

body {
  background-color: var(--bg-color); /* use variable msh color static */
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden; /* prevent horizontal scroll */
  animation: var(--animation);
  transition: background 0.3s ease, color 0.3s ease; /* smooth theme switch */
}

body::before {
  content: none;
}

/* ========= VARIABLES ========= */
:root {

  /* ========= COLORS ========= */
  --primary-color: #00ff9d; /* color of buttons & icons */
  --bg-color: #0a0a0a; /* main background (dark default) */
  --surface-color: rgba(255, 255, 255, 0.03); /* glass / cards */
  --border-color: rgba(255, 255, 255, 0.1);
  --footer-bg: #080808; /* background bta3 el footer f el dark */

  /* el 7ata bta3t marly (glow system) */
  --primary-dim:    rgba(0,255,157,0.08);
  --primary-glow:   rgba(0,255,157,0.18);
  --primary-dark:   rgba(0,255,157,0.25);

  /* ========= STATES ========= */
  --error:   #ff4d4d; /* any errors */
  --success: #00ff9d; /* success messages */

  /* ========= TEXT ========= */
  --text-main: #ffffff; /* main text color */
  --text-muted: #999; /* muted text color */

  /* ========= RADIUS ========= */
  --radius:    16px;
  --radius-sm: 10px;
  --radius-lg: 24px;

  /* ========= MOTION ========= */
  --transition: 0.3s ease; /* use per property msh all */
  --animation: transitionIn 0.8s ease-out; /* page load */

  /* ========= TYPOGRAPHY ========= */
  --font-family: "Poppins", "Cairo", system-ui, sans-serif;

  /* ========= LAYOUT ========= */
  --max-width: 1200px;
}

/* ========= LIGHT THEME ========= */
/* bn8ayar el variables bas mn 8er ma n3ml override lel CSS */
/* ── LIGHT THEME OVERRIDES (Professional & Serious) ── */

[data-theme="light"] {

  /* ========= COLORS ========= */
  --bg-color: #f8fafc; 
  --text-main: #0f172a;
  --text-muted: #475569; /* Slate 600 */

  /* glass system */
  --surface-color: rgba(255, 255, 255, 0.8);
  --border-color: rgba(15, 23, 42, 0.08);
  --footer-bg: #ffffff; /* background bta3 el footer f el light */

  /* primary (emerald style) */
  --primary-color: #059669;
  --primary-glow: rgba(5, 150, 105, 0.15);

  /* shadow system */
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.04),
                 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}
/* ================= LIGHT MODE TABLE FIX ================= */

[data-theme="light"] .team-table {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(15, 23, 42, 0.08);

  box-shadow:
    0 10px 25px -5px rgba(0, 0, 0, 0.04),
    0 8px 10px -6px rgba(0, 0, 0, 0.03);

  backdrop-filter: blur(10px);
}

[data-theme="light"] .team-table thead {
  background: rgba(5, 150, 105, 0.06);
}

[data-theme="light"] .team-table th {
  color: var(--primary-color);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .team-table td {
  color: var(--text-main);
  border-bottom: 1px solid rgba(15, 23, 42, 0.05);
}

[data-theme="light"] .team-table tr:hover td {
  background: rgba(5, 150, 105, 0.05);
}

[data-theme="light"] .team-table th:first-child,
[data-theme="light"] .team-table td:first-child {
  border-right: 1px solid rgba(15, 23, 42, 0.06);
}

/* ================= LIGHT MODE CARDS FIX ================= */

[data-theme="light"] .glass-card,
[data-theme="light"] .glass-form {

    background: rgba(255, 255, 255, 0.92);

    border: 1px solid rgba(15, 23, 42, 0.08);

    box-shadow:
        0 10px 25px -5px rgba(0, 0, 0, 0.05),
        0 8px 10px -6px rgba(0, 0, 0, 0.03);

    backdrop-filter: blur(12px);
}


/* hover */

[data-theme="light"] .glass-card:hover {

    transform: translateY(-4px);

    box-shadow:
        0 16px 35px -8px rgba(0, 0, 0, 0.08),
        0 10px 15px -8px rgba(0, 0, 0, 0.04);
}
/* ========= LAYOUT STRUCTURE (Side-by-Side Fix) ========= */
/* el 7ata de 3shan t-khaly el sidebar wel content gamb ba3d msh ta7t ba3d */
.course-layout {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  width: 90%;
  max-width: var(--max-width);
  margin: 40px auto;
  align-items: flex-start;
}

.main-content { flex: 2; } /* el core content bta3 el course */
.sidebar { flex: 1; position: sticky; top: 100px; } /* el curriculum elly 3la el gamb */


/* ========= COMPONENT ADJUSTMENTS (LIGHT MODE) ========= */
/* bn3dl el components 3shan yb2a clean w professional */

/* glass cards */
[data-theme="light"] .glass {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow) !important;
  backdrop-filter: blur(10px);
}

/* primary buttons */
[data-theme="light"] .btn-primary {
  background: var(--primary-color);
  color: #ffffff; /* contrast a7san */
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.2);
}

/* ghost buttons */
[data-theme="light"] .btn-ghost {
  color: var(--text-main);
  border-color: var(--border-color);
}

/* ========= NAVBAR & NAVIGATION ========= */
/* lazm el nav y-kon flex w y-match el variables */

        /* ================= NAVBAR ================= */

        nav {
            width: 100%;
            height: 80px;
            padding: 0 7%;

            display: flex;
            align-items: center;
            justify-content: space-between;

            position: sticky;
            top: 0;
            z-index: 1000;

            backdrop-filter: blur(14px);
            background: rgba(0, 0, 0, 0.2);

            border-bottom: 1px solid var(--border-color);
        }

        .logo {
            text-decoration: none;
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-main);
            font-weight: 600;
            position: relative;
            transition: 0.3s;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -6px;
            width: 0%;
            height: 2px;
            background: var(--primary-color);
            transition: 0.3s;
        }

        .nav-links a:hover::after,
        .nav-links .active::after {
            width: 100%;
        }

        .nav-links a:hover {
            color: var(--primary-color);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .theme-btn,
        .user-profile-link {
            width: 45px;
            height: 45px;

            border-radius: 50%;
            border: 1px solid var(--border-color);

            background: var(--glass);

            display: flex;
            align-items: center;
            justify-content: center;

            text-decoration: none;
            color: var(--text-main);

            transition: 0.3s;
            cursor: pointer;
            font-size: 1.2rem;
        }

        .theme-btn:hover,
        .user-profile-link:hover {
            transform: translateY(-2px);
            color: var(--primary-color);
            box-shadow: 0 0 12px rgba(0, 255, 255, 0.1);
        }
/* ========= THEME TOGGLE (Big Icon) ========= */
.theme-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    width: 45px; height: 45px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}

.theme-btn i {
    font-size: 1.5rem !important; /* kbar el size 3shan t-ban */
    color: var(--primary-color) !important;
    pointer-events: none;
    border-radius: 50%;
    /* padding: 6px; */
}

.theme-btn:hover {
    background: var(--primary-color);
    box-shadow: 0 0 15px var(--primary-glow);
}

.theme-btn:hover i { color: #000 !important; }

/* ========= 4. FOOTER SECTION ========= */
/* el footer lazm y-switch lonoh m3 el mode */
.mainFooter {
  width: 100%;
  padding: 40px 0;
  background: var(--footer-bg); 
  border-top: 1px solid var(--border-color);
  margin-top: 80px;
  flex-shrink: 0;
  transition: var(--transition);
}

.mainFooter .container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap; 
  gap: 20px;
}

.mainFooter p {
  margin: 0; 
  font-size: 14px;
  color: var(--text-main); /* lon el text y-switch 3shan y-ban */
}

.design span {
  color: var(--primary-color);
  font-weight: bold;
}

.footerLinks { display: flex; gap: 24px; }
.footerLinks a {
  color: var(--text-muted);
  font-size: 14px;
  text-decoration: none;
  transition: var(--transition);
}

.footerLinks a:hover { color: var(--primary-color); }

/* ========= ANIMATIONS ========= */
@keyframes transitionIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* el 7ata bta3t marly pulse */
@keyframes pulse {
  0%,100% { 
    opacity:1; 
    transform:scale(1);   
    box-shadow: 0 0 0 0 rgba(0,255,157,0.4); 
  }
  50% { 
    opacity:.7; 
    transform:scale(.85); 
    box-shadow: 0 0 0 6px rgba(0,255,157,0); 
  }
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .course-layout { flex-direction: column; }
  .mainFooter .container { flex-direction: column; text-align: center; }
}