:root {
    --bg: #ffffff;
    --text: #1e293b;
    --sub-text: #64748b;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --primary: #6366f1;
    --nav-grad: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --sticky-bg: #f1f5f9; /* Standout background */
    --toast-bg: #1e293b;
    --toast-text: #ffffff;
    --footer-bg: #f8fafc;
}

[data-theme="dark"] {
    --bg: #0f172a;
    --text: #f1f5f9;
    --sub-text: #94a3b8;
    --card-bg: #1e293b;
    --card-border: #334155;
    --primary: #818cf8;
    --glass-bg: rgba(15, 23, 42, 0.9);
    --sticky-bg: #1e293b; /* Standout background dark */
    --toast-bg: #f1f5f9;
    --toast-text: #0f172a;
    --footer-bg: #020617;
}

body { 
    background-color: var(--bg); 
    color: var(--text); 
    transition: background 0.3s, color 0.3s;
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
}

/* Narrow content width as requested */
.content-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 15px;
}

/* --- BEAUTIFIED HEADER --- */
.navbar {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    padding: 0.8rem 0;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    background: var(--nav-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}
.navbar .btn {
	font-size: 0.9rem; 
	background: var(--nav-grad); 
	border: none; 
	box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
	transition: transform 0.2s;
}
.nav-link {
    color: var(--text) !important;
    font-weight: 600;
    font-size: 0.9rem;
    margin: 0 8px;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0; height: 2px; bottom: 0; left: 0;
    background: var(--nav-grad);
    transition: width 0.3s ease;
}

.nav-link:hover::after { width: 100%; }

.theme-toggle-btn {
    width: 42px; height: 42px; border-radius: 12px;
    background: var(--card-bg); border: 1px solid var(--card-border);
    color: var(--text); display: flex; align-items: center; justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.theme-toggle-btn:hover { transform: rotate(15deg) scale(1.1); border-color: var(--primary); }

/* --- STICKY CONTROLS --- */
.sticky-controls {
    position: sticky;
    top: 72px; 
    z-index: 1000;
    
    /* Highlighted Background */
    background-color: var(--sticky-bg); 
    
    padding: 20px;
    margin-bottom: 30px;
    
    /* Border to define the shape */
    border: 1px solid var(--card-border);
    
    /* Subtle shadow to lift it off the results */
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

input { 
    border: 2px solid var(--card-border) !important;
    background: var(--bg) !important;
    color: var(--text) !important;
    border-radius: 12px !important;
    padding: 15px 20px !important;
    font-size: 1.2rem !important;
}
input:focus { border-color: var(--primary) !important; box-shadow: none !important; }

.tabs-nav {
    display: flex; gap: 8px; overflow-x: auto; padding: 15px 0 0;
    scrollbar-width: none; scroll-behavior: smooth;
}
.tabs-nav::-webkit-scrollbar { display: none; }

.tab-item {
    white-space: nowrap; padding: 6px 18px; background: var(--card-bg);
    border: 1px solid var(--card-border); border-radius: 20px; cursor: pointer;
    font-size: 0.85rem; color: var(--sub-text); transition: all 0.2s ease;
}
.tab-item:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    background-color: rgba(99, 102, 241, 0.05);
}
.tab-item.active { 
    background: var(--primary) !important; 
    color: white !important; 
    border-color: var(--primary) !important;
    transform: translateY(0);
}

/* --- RESULTS --- */
.card-custom {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}
.card-custom:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }
.output-text { font-size: 1rem; font-weight: 500; word-break: break-all; }

.section-header {
    font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1.5px;
    color: var(--sub-text); margin-top: 50px; margin-bottom: 20px; font-weight: 800;
}

.content-article {
  max-width: 800px;
  margin: 4rem auto;
  color: var(--text);
  line-height: 1.8;
  font-size: 1.05rem;
}

.content-article h2, .content-article h3 {
  font-weight: 800;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.intro-text {
  font-size: 1.15rem;
  color: var(--sub-text);
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 3rem 0;
}

.feature-box {
  background: var(--card-bg);
  padding: 1.8rem;
  border-radius: 16px;
  border: 1px solid var(--card-border);
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}

.feature-box:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 10px 15px rgba(0,0,0,0.05);
}

.feature-box h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.3rem;
}

.feature-box p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--sub-text);
}

/* Steps */
.steps-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 2rem 0 3rem 0;
}

.step {
  flex: 1;
  min-width: 220px;
  background: var(--sticky-bg);
  padding: 1.8rem;
  border-radius: 16px;
  position: relative;
  border: 1px solid var(--card-border);
  transition: transform 0.2s;
}

.step:hover {
  transform: translateY(-3px);
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--nav-grad);
  color: white;
  border-radius: 50%;
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

.step h4 {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.step p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--sub-text);
}

/* Table */
.comparison-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0 3rem 0;
  border-radius: 16px;
  border: 1px solid var(--card-border);
  box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  min-width: 500px;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
  font-size: 1rem;
}

.comparison-table th {
  background: var(--sticky-bg);
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover {
  background: var(--sticky-bg);
}

/* FAQ */
.faq-section {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.faq-item {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--card-border);
}

.faq-item h4 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.2rem;
}

.faq-item p {
  margin: 0;
  color: var(--sub-text);
  font-size: 1rem;
  line-height: 1.6;
}
.symbols-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
	gap: 12px;
	margin-top: 2rem;
}

.symbol-item {
	background: var(--bg-card);
	border: 1px solid var(--border-color);
	border-radius: 8px;
	padding: 1rem;
	text-align: center;
	font-size: 1.5rem;
	cursor: pointer;
	transition: all 0.2s;
}

.symbol-item:hover {
	transform: scale(1.1);
	border-color: var(--primary-color);
	background: var(--input-bg);
}
.usernames {
	margin:10px 0px 40px;
}

/* --- FOOTER --- */
footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--card-border);
    padding: 60px 0 20px;
    margin-top: 80px;
}
@media (max-width: 768px) {
    footer {
        padding-bottom: 80px;
    }
}
.footer-link { color: var(--sub-text); text-decoration: none; font-size: 0.9rem; transition: 0.2s; display: inline-block; padding: 4px 0; }
.footer-link:hover { color: var(--primary); }

#toast {
    position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
    background: var(--toast-bg); color: var(--toast-text);
    padding: 12px 35px; border-radius: 50px; display: none; z-index: 2000;
    font-weight: 600; box-shadow: 0 10px 25px rgba(0,0,0,0.2);
	font-size:14px;
}

@media (max-width: 991px) {
    .navbar-collapse {
        background: var(--card-bg); margin-top: 1rem; padding: 1.5rem;
        border-radius: 15px; border: 1px solid var(--card-border);
    }
    .nav-link { border-bottom: 1px solid var(--card-border); padding: 12px 0; }
}