:root {
--radius: 1rem;
--color-primary: #0056b3;
--color-secondary: #6c757d;
--color-accent: #ffc107;
--font-main: 'Vazirmatn', sans-serif;
--bg: #f8f9fa;
--fg: #212529;
--card-bg: #fff;
}

body[data-theme='dark'] {
padding-top: 70px; /* ارتفاع منو */
--bg: #121212;
--fg: #f1f1f1;
--card-bg: #1e1e1e;
--color-primary: #4dabf7;
--color-secondary: #adb5bd;
--color-accent: #ffd43b;
}

body {
padding-top: 70px; /* ارتفاع منو */
background: var(--bg);
font-family: var(--font-main);
color: var(--fg);
transition: background 0.3s, color 0.3s;
}
/* حالت عادی (روشن) */
.navbar-light .navbar-nav .nav-link {
  color: #333; /* متن تیره */
}

/* حالت دارک */
body.dark-mode .navbar {
  background-color: #222 !important;
}

body.dark-mode .navbar .navbar-brand,
body.dark-mode .navbar .nav-link {
  color: #f1f1f1 !important;  /* سفید برای دیده شدن */
}

body.dark-mode .navbar .nav-link:hover {
  color: #ffd700 !important; /* رنگ طلایی برای hover */
}


.navbar, footer {
background: var(--card-bg);
transition: background 0.3s;
}

.card, .navbar, .ratio, img {
border-radius: var(--radius) !important;
background: var(--card-bg);
color: var(--fg);
}

.navbar-brand {
font-weight: 700;
color: var(--color-primary) !important;
}

.timeline li {
position: relative;
padding-left: 1.5rem;
border-left: 2px solid var(--color-primary);
}


.timeline li::before {
content: "";
position: absolute;
left: -6px;
top: 4px;
width: 12px;
height: 12px;
background: var(--color-accent);
border-radius: 50%;
}

.fade-item {
opacity: 0;
transform: translateY(20px);
transition: all 0.6s ease;
}


.fade-item.visible {
opacity: 1;
transform: translateY(0);
}

.btn-primary {
background-color: var(--color-primary);
border-color: var(--color-primary);
}
.btn-primary:hover {
background-color: #003f88;
border-color: #003f88;
}


.btn-outline-secondary {
color: var(--color-secondary);
border-color: var(--color-secondary);
}
.btn-outline-secondary:hover {
background-color: var(--color-secondary);
color: #fff;
}


.card, .navbar, .ratio, img {
border-radius: var(--radius) !important;
}


.badge {
border-radius: .7rem;
}


.badge.text-bg-secondary {
background-color: var(--color-primary) !important;
}


h1, h2, h3, h4, h5 {
font-weight: 700;
color: var(--color-primary);
}


footer {
border-top: 2px solid var(--color-accent);
}
/* --- Navbar --- */
.navbar {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  padding: 0.8rem 1rem;
  transition: padding 0.3s ease, background 0.3s ease;
}

/* جمع‌تر شدن navbar هنگام اسکرول */
.navbar.shrink {
  padding: 0.4rem 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* لینک‌ها */
.navbar .nav-link {
  position: relative;
  font-weight: 500;
  color: var(--fg);
  margin: 0 0.4rem;
  transition: color 0.3s ease;
}
.navbar .nav-link:hover {
  color: var(--color-primary);
}

/* افکت خط زیر لینک */
.navbar .nav-link::after {
  content: "";
  position: absolute;
  bottom: -3px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}
.navbar .nav-link:hover::after {
  width: 60%;
}

/* دکمه‌ها سمت راست */
.navbar .btn {
  border-radius: 50px;
  font-weight: 500;
  transition: transform 0.2s ease;
}
.navbar .btn:hover {
  transform: translateY(-2px);
}