* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    /* Professional Gradient Background */
    background: linear-gradient(135deg, #e2e8f0, #94a3b8);
    color: #1e293b;
    padding: 30px;
    min-height: 100vh;
}

/* Navigation Tabs (Glassmorphism) */
header {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.nav-tabs {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 8px;
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.tab-btn {
    border: none;
    background: transparent;
    padding: 10px 25px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    border-radius: 8px;
    color: #475569;
    transition: 0.3s;
}

.tab-btn.active, .tab-btn:hover {
    background: #0f172a;
    color: white;
}

/* Grid Layout - Strictly 3 Columns */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* သုံးခုတစ်တန်း weight */
    gap: 30px;
}

/* Responsive Grid for mobile */
@media (max-width: 900px) {
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .tools-grid { grid-template-columns: 1fr; }
}

/* Tool Cards (Glassmorphism + Bold Borders) */
.tool-card {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.1);
    border: 3px solid rgba(255, 255, 255, 0.9);
    transition: transform 0.3s, box-shadow 0.3s;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.2);
    border-color: #ffffff;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

/* Icons Color */
.icon-box {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    border: 2px solid rgba(255,255,255,0.8);
}
.text-icon { background: #ecfdf5; color: #10b981; }
.dev-icon { background: #fef3c7; color: #f59e0b; }
.image-icon { background: #eff6ff; color: #3b82f6; }

.badge.free {
    background: #0f172a;
    color: #ffffff;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 800;
}

h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 8px;
    color: #0f172a;
}

p {
    font-size: 14px;
    font-weight: 500;
    color: #334155;
    margin-bottom: 20px;
}

/* Bolder Inputs & Buttons */
.bold-input {
    width: 100%;
    padding: 10px;
    border: 2px solid #94a3b8;
    border-radius: 8px;
    margin-bottom: 12px;
    font-weight: 600;
    background: rgba(255,255,255,0.7);
    outline: none;
    transition: 0.2s;
}

.bold-input:focus {
    border-color: #0f172a;
    background: #ffffff;
}

.action-btn {
    background: #0f172a;
    color: white;
    border: 2px solid #0f172a;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-weight: 800;
    font-size: 15px;
    transition: 0.3s;
}

.action-btn:hover {
    background: transparent;
    color: #0f172a;
}