/* Custom stylesheet */
:root {
    --primary-color: #3498db;
    --secondary-color: #5D6D7E;
    --light-gray: #f8f9fa;
    --dark-gray: #2C3E50;
    --accent-color: #E74C3C;
    /* New Bright Transparent Colors */
    --card-1-bg: rgba(46, 204, 113, 0.85);   /* Softwareentwicklung – green */
    --card-1-icon-bg: rgba(255, 255, 255, 0.5);
    --card-1-text: #ffffff;
    --card-2-bg: rgba(41, 128, 185, 0.75);   /* Business/Unternehmen – blue */
    --card-2-icon-bg: rgba(255, 255, 255, 0.5);
    --card-2-text: #ffffff;
    --card-3-bg: rgba(255, 152, 0, 0.85);    /* Industrial Automation – orange */
    --card-3-icon-bg: rgba(255, 255, 255, 0.25);
    --card-3-text: #ffffff;
    --card-4-bg: rgba(63, 81, 181, 0.85);    /* Embedded Systems – indigo */
    --card-4-icon-bg: rgba(255, 255, 255, 0.25);
    --card-4-text: #ffffff;
    --card-5-bg: rgba(156, 39, 176, 0.85);   /* Product Management – purple */
    --card-5-icon-bg: rgba(255, 255, 255, 0.25);
    --card-5-text: #ffffff;
}

body {
    padding-top: 4.5rem;
    font-family: 'Roboto', sans-serif;
    color: var(--secondary-color);
}

main {
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .navbar-brand, .card-title {
    font-family: 'Montserrat', sans-serif;
    color: var(--dark-gray);
}

.navbar-brand img {
    height: 40px;
}

.hero {
    height: 90vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1521737604893-d14cc237f11d?q=80&w=1784&auto=format&fit=crop') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero h1, .hero h2, .hero p {
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
}

.page-header {
    background-color: var(--dark-gray);
    color: #FFFFFF;
    padding: 4rem 0;
    text-align: center;
}

.page-header h1, .page-header p {
    color: #FFFFFF;
}

/* Services Section & Flip Card Styles */
.services-section {
    background-color: var(--light-gray);
}

.flip-card {
    background-color: transparent;
    width: 100%;
    height: 300px;
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flip-card.is-flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.flip-card-back {
    transform: rotateY(180deg);
}

.flipper-btn {
    text-decoration: none;
    color: var(--card-1-text);
    cursor: pointer;
    position: absolute;
    bottom: 20px;
}

/* Card Specific Colors */
.card-color-1 { background-color: var(--card-1-bg); color: var(--card-1-text); }
.card-color-2 { background-color: var(--card-2-bg); color: var(--card-2-text); }
.card-color-3 { background-color: var(--card-3-bg); color: var(--card-3-text); }
.card-color-4 { background-color: var(--card-4-bg); color: var(--card-4-text); }
.card-color-5 { background-color: var(--card-5-bg); color: var(--card-5-text); }

.card-color-1 h5 { color: var(--card-1-text); }
.card-color-2 h5 { color: var(--card-2-text); }
.card-color-3 h5 { color: var(--card-3-text); }
.card-color-4 h5 { color: var(--card-4-text); }
.card-color-5 h5 { color: var(--card-5-text); }

.card-color-1 .flipper-btn { color: var(--card-1-text); }
.card-color-2 .flipper-btn { color: var(--card-2-text); }
.card-color-3 .flipper-btn { color: var(--card-3-text); }
.card-color-4 .flipper-btn { color: var(--card-4-text); }
.card-color-5 .flipper-btn { color: var(--card-5-text); }

.service-icon {
    margin: 0 auto;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-color-1 .service-icon { background-color: var(--card-1-icon-bg); }
.card-color-2 .service-icon { background-color: var(--card-2-icon-bg); }
.card-color-3 .service-icon { background-color: var(--card-3-icon-bg); }
.card-color-4 .service-icon { background-color: var(--card-4-icon-bg); }
.card-color-5 .service-icon { background-color: var(--card-5-icon-bg); }

.service-icon i {
    font-size: 2.5rem;
    color: #ffffff;
}

.team-card {
    border: none;
    transition: all 0.3s ease;
}

.team-img {
    filter: grayscale(50%);
    transition: all 0.3s ease;
}

.team-card:hover .team-img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

/* Social Links Icon Styles */
.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin: 0 5px; /* Replaced margin-right for even spacing */
    background-color: #f1f1f1;
    color: var(--dark-gray);
    transition: background-color 0.3s, color 0.3s, transform 0.3s;
    text-decoration: none;
    vertical-align: middle; /* Ensures vertical alignment */
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    transform: translateY(-2px); /* Slight lift on hover */
}

.social-links a i {
    font-size: 1.2rem;
    line-height: 1; /* Ensures icon is centered vertically */
}

footer small a {
    text-decoration: none;
    color: var(--dark-gray);
}

footer small a:hover {
    color: var(--primary-color);
}

.back-to-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 996;
  background: var(--primary-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: all 0.4s;
}

.back-to-top i {
  font-size: 28px;
  color: #fff;
  line-height: 0;
}

.back-to-top:hover {
  background: var(--accent-color);
  color: #fff;
}

.back-to-top.active {
  visibility: visible;
  opacity: 1;
}