/* ==========================================================================
   MERTOLOGY - GLOBAL STYLE SHEET (REVISED)
   ========================================================================== */

:root {
    --mert-green: #2ecc71;
    --mert-blue: #3498db;
    --mert-purple: #9b59b6;
    --mert-dark: #0f1115;
    --mert-soft-bg: #ffffff;
    --mert-gradient: linear-gradient(135deg, var(--mert-green) 0%, var(--mert-blue) 50%, var(--mert-purple) 100%);
    --mert-gradient-soft: linear-gradient(135deg, rgba(46, 204, 113, 0.04) 0%, rgba(52, 152, 219, 0.04) 50%, rgba(155, 89, 182, 0.04) 100%);
    --transition-smooth: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}

body {
    background-color: var(--mert-soft-bg);
    color: var(--mert-dark);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1 0 auto;
}

.text-gradient {
    background: var(--mert-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.text-green {
    color: var(--mert-green) !important;
}

.text-blue {
    color: var(--mert-blue) !important;
}

.text-purple {
    color: var(--mert-purple) !important;
}

/* --- NAVBAR --- */
#mainNav {
    transition: var(--transition-smooth);
    background-color: rgba(255, 255, 255, 0.96) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03) !important;
    backdrop-filter: blur(12px);
}

.navbar-nav .nav-link {
    position: relative;
    font-weight: 600;
    font-size: 0.95rem;
    color: #4a5568 !important;
    transition: var(--transition-smooth);
}

    .navbar-nav .nav-link:hover {
        color: var(--mert-blue) !important;
    }

/* --- HERO SECTION & RESPONSIVE FIXES --- */
.hero-section {
    position: relative;
    padding-top: 140px;
    padding-bottom: 80px;
    min-height: 80vh;
    background: var(--mert-gradient-soft);
    display: flex;
    align-items: center;
}

/* Mobil Ekranda Taşmayı Önleyen Dinamik Başlık Skalası */
.main-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -1px;
    color: var(--mert-dark);
    line-height: 1.1;
}

/* Mobilde Dağılmayı Önleyen Esnek Altyazı Düzeni */
.sub-title {
    font-size: clamp(0.75rem, 2.5vw, 1.1rem);
    font-weight: 600;
    letter-spacing: 2px;
    color: #718096;
    text-transform: uppercase;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

    .sub-title .dot {
        color: var(--mert-blue);
    }

/* --- BUTTONS --- */
.btn-gradient {
    background: var(--mert-gradient);
    color: #ffffff !important;
    font-weight: 700;
    padding: 12px 32px;
    border-radius: 50px;
    border: none;
    transition: var(--transition-smooth);
}

    .btn-gradient:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(52, 152, 219, 0.2);
    }

.btn-outline-dark {
    border: 2px solid var(--mert-dark);
    font-weight: 700;
    padding: 10px 30px;
    border-radius: 50px;
    transition: var(--transition-smooth);
}

    .btn-outline-dark:hover {
        background-color: var(--mert-dark);
        color: #ffffff !important;
        transform: translateY(-2px);
    }

/* --- LUXURY SOLUTION CARDS (NO BROKEN IMAGES) --- */
.title-underline {
    width: 50px;
    height: 4px;
    background: var(--mert-gradient);
    border-radius: 10px;
}

.solution-badge-card {
    padding: 24px;
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: var(--transition-smooth);
}

    .solution-badge-card i {
        font-size: 2rem;
        margin-bottom: 12px;
        display: inline-block;
    }

    .solution-badge-card h5 {
        font-size: 1rem;
        font-weight: 700;
        color: var(--mert-dark);
        margin: 0;
    }

    .solution-badge-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 24px rgba(0,0,0,0.04);
        border-color: rgba(52, 152, 219, 0.3);
    }

/* --- ANIMATIONS --- */
.animate-fadeIn {
    animation: fadeIn 0.8s ease-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}