/* --- STF.css: RESTORED 4:35 PM PREMIUM RED THEME --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

/* Header & Navigation */
header {
    background: #fff;
    padding: 15px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header h2 {
    color: #cc0000;
    font-size: 24px;
    margin: 0;
}

header p {
    font-size: 10px;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.right-header {
    display: flex;
    align-items: center;
    gap: 20px;
}

.login-btn {
    background: linear-gradient(to right, #e60000, #cc0000);
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.login-btn:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

/* Hero Section */
.container {
    text-align: center;
    padding: 60px 20px;
}

.how-btn {
    background: #ffe5e5;
    color: #cc0000;
    border: none;
    padding: 6px 15px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 12px;
    margin-bottom: 20px;
}

h1 { font-size: 3rem; color: #1a1a1a; margin-bottom: 10px; }
.subtitle { font-size: 1.2rem; color: #666; margin-bottom: 40px; }

/* Cards */
.card-wrapper {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.card {
    background: #fff;
    padding: 40px 25px;
    border-radius: 20px;
    width: 320px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: 0.3s;
}

.card:hover { transform: translateY(-10px); }

.card h3 {
    margin-top: 15px;
    margin-bottom: 10px;
}

.card .number {
    position: absolute;
    top: -15px;
    left: 25px;
    background: #cc0000;
    color: #fff;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.card .icon { font-size: 40px; margin-bottom: 15px; }

/* Features Row */
.features {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 40px 20px;
    flex-wrap: wrap;
}

.feature-box {
    background: #fff;
    padding: 15px 25px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    width: 250px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
}

.feature-box h4 {
    margin: 0;
    font-size: 15px;
}

.feature-box p {
    margin: 0;
    font-size: 12px;
    color: #888;
}

.f-icon {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
}

.f-icon.green { background: #e8f5e9; color: #2e7d32; }
.f-icon.yellow { background: #fffde7; color: #fbc02d; }
.f-icon.red { background: #ffebee; color: #c62828; }
.f-icon.purple { background: #f3e5f5; color: #7b1fa2; }

/* Stats */
.stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 40px 20px;
}

.stat-card {
    background: #fff;
    padding: 20px 35px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
}

.stat-icon { font-size: 25px; }
.stat-card h2 { color: #cc0000; font-size: 2rem; margin: 0; }
.stat-card p { margin: 0; color: #888; font-size: 13px; }

/* Action Cards */
.action-section {
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 60px 20px;
}

.action-card {
    background: #fff;
    padding: 40px;
    border-radius: 25px;
    width: 450px;
    text-align: center;
    box-shadow: 0 15px 40px rgba(0,0,0,0.05);
}

.action-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.btn-primary {
    background: linear-gradient(to right, #e60000, #cc0000);
    color: #fff;
    border: none;
    padding: 12px 30px;
    border-radius: 10px;
    width: 100%;
    margin-top: 20px;
    font-weight: bold;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s;
}

.btn-outline {
    background: #fff;
    color: #cc0000;
    border: 2px solid #cc0000;
    padding: 12px 30px;
    border-radius: 10px;
    width: 100%;
    margin-top: 20px;
    font-weight: bold;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s;
}

.btn-primary:hover, .btn-outline:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

/* Compatibility Guide */
.blood-guide { padding: 60px 20px; text-align: center; }
.blood-wrapper {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.blood-card-red { background: #ffebee; color: #c62828; padding: 25px; border-radius: 15px; width: 250px; border: 1px solid #ffcdd2; }
.blood-card-blue { background: #e3f2fd; color: #1565c0; padding: 25px; border-radius: 15px; width: 250px; border: 1px solid #bbdefb; }
.blood-card-green { background: #e8f5e9; color: #2e7d32; padding: 25px; border-radius: 15px; width: 250px; border: 1px solid #c8e6c9; }
.blood-card-purple { background: #f3e5f5; color: #7b1fa2; padding: 25px; border-radius: 15px; width: 350px; border: 1px solid #e1bee7; margin-top: 10px; }

.important-box {
    background: #fff3e0;
    border-left: 5px solid #ff9800;
    padding: 15px;
    margin: 40px auto;
    max-width: 800px;
    border-radius: 5px;
    text-align: left;
}

.footer-note { padding: 40px; color: #888; text-align: center; font-size: 14px; }