/*
   Piar Yazılım - Premium Enterprise Design System
   Inspired by global text-focused SaaS/Tech leaders
*/

:root {
    --bg-main: #FAFAFA;
    --bg-surface: #FFFFFF;
    
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-inverse: #FFFFFF;
    
    --border-color: #E5E7EB;
    --border-subtle: #F3F4F6;
    
    --primary-color: #000000;
    --primary-hover: #1F2937;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --container-width: 1140px;
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.text-center {
    text-align: center;
}

/* Typography Headings */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--bg-main);
    border-color: #D1D5DB;
}

.btn-outline {
    background-color: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}

.btn-outline:hover {
    color: var(--text-primary);
}

/* Modern Floating Navbar (Pill Style - Dark) */
.navbar {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 95%;
    max-width: 1100px;
    background-color: rgba(0, 0, 0, 0.85); /* Black with transparency */
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    z-index: 1000;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-container {
    padding: 10px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.brand-name {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 50px;
}

.nav-links a:hover {
    color: #FFFFFF;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Menu Toggle (Mobile) */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #FFFFFF;
    font-size: 28px;
    cursor: pointer;
    z-index: 1001;
}

.nav-actions .btn {
    background-color: #FFFFFF;
    color: #000000;
    border: none;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 100px;
    transition: all 0.3s ease;
}

.nav-actions .btn:hover {
    background-color: #F3F4F6;
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 50% -20%, rgba(37, 99, 235, 0.12) 0%, rgba(250, 250, 250, 0) 70%);
}

/* Canvas Background for Network Particle Animation */
.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 16px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 32px;
    transition: var(--transition);
    cursor: default;
}

.badge:hover {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.2);
    transform: translateY(-1px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #10B981; 
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
    position: relative;
}

/* Pulsing effect for the badge dot */
.badge-dot::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background-color: #10B981;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: badge-pulse 2s infinite;
}

@keyframes badge-pulse {
    0% {
        width: 100%;
        height: 100%;
        opacity: 0.5;
    }
    100% {
        width: 300%;
        height: 300%;
        opacity: 0;
    }
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Services / Features Grid */
.services-section {
    padding: 100px 0;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    max-width: 600px;
    margin: 0 auto 64px auto;
}

.section-title {
    font-size: 36px;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 18px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.02) 0%, rgba(0,0,0,0) 100%);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    background-color: #FFFFFF;
    border-color: #D1D5DB;
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.08);
    transform: translateY(-8px) scale(1.02);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feature-card:hover .feature-icon {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.feature-title {
    font-size: 18px;
    margin-bottom: 12px;
    transition: transform 0.3s ease, color 0.3s ease;
}

.feature-card:hover .feature-title {
    transform: translateX(4px);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    transition: opacity 0.3s ease;
}

/* Portfolio Section */
.portfolio-section {
    padding: 100px 0;
    background-color: var(--bg-main);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.portfolio-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.portfolio-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.portfolio-img {
    width: 100%;
    height: 350px;
    position: relative;
    overflow: hidden;
    background-color: #F3F4F6;
}

.portfolio-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    transition: transform 0.6s ease;
}

.portfolio-card:hover .portfolio-img img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(17, 24, 39, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-info {
    padding: 24px;
}

.portfolio-category {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: block;
}

.portfolio-title {
    font-size: 20px;
    color: var(--text-primary);
}

/* Blog Section */
.blog-section {
    padding: 100px 0;
    background-color: #FAFAFA;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: color 0.3s ease, transform 0.3s ease;
}

.back-link:hover {
    color: var(--primary-color);
    transform: translateX(-6px);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.blog-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: #D1D5DB;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 13px;
}

.blog-date {
    color: var(--text-secondary);
}

.blog-tag {
    color: var(--primary-color);
    font-weight: 600;
    background: rgba(17, 24, 39, 0.05);
    padding: 4px 10px;
    border-radius: 20px;
}

.blog-title {
    font-size: 20px;
    line-height: 1.4;
    margin-bottom: 12px;
}

.blog-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.blog-title a:hover {
    color: var(--primary-hover);
}

.blog-excerpt {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 24px;
    flex-grow: 1;
}

.blog-read-more {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    transition: gap 0.2s ease;
}

.blog-card:hover .blog-read-more {
    gap: 10px;
}

/* Metrics Section */
.metrics-section {
    padding: 80px 0;
}

.metrics-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.metric-value {
    font-size: 56px;
    font-weight: 700;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, var(--text-primary) 0%, #4B5563 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 12px;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: inline-block;
}

.metric-item:hover .metric-value {
    transform: scale(1.1);
}

.metric-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-divider {
    width: 1px;
    height: 60px;
    background-color: var(--border-color);
}

/* CTA Section */
.cta-section {
    padding: 80px 0 120px 0;
}

.cta-card {
    background-color: var(--primary-color);
    border-radius: 16px;
    padding: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-lg);
    color: var(--text-inverse);
}

.cta-content {
    max-width: 500px;
}

.cta-content h2 {
    color: var(--text-inverse);
    font-size: 32px;
    margin-bottom: 16px;
}

.cta-content p {
    color: #9CA3AF;
    font-size: 18px;
}

.cta-form-wrapper {
    flex: 1;
    max-width: 450px;
    width: 100%;
}

.animated-form {
    background: var(--bg-surface);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    position: relative;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 16px 16px 16px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    outline: none;
    transition: all 0.3s ease;
}

.input-group textarea {
    resize: vertical;
    min-height: 100px;
}

.input-group label {
    position: absolute;
    left: 16px;
    top: 16px;
    color: var(--text-secondary);
    font-size: 15px;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Floating Label Animation */
.input-group input:focus,
.input-group textarea:focus,
.input-group input:not(:placeholder-shown),
.input-group textarea:not(:placeholder-shown) {
    border-color: var(--primary-hover);
    background: var(--bg-surface);
    box-shadow: 0 0 0 4px rgba(0,0,0,0.05);
}

.input-group input:focus + label,
.input-group textarea:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    left: 12px;
    font-size: 12px;
    background: var(--bg-surface);
    padding: 0 4px;
    color: var(--primary-hover);
    border-radius: 4px;
}

/* Phone Group specific */
.prefix-str {
    position: absolute;
    left: 16px;
    top: 17px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 15px;
    pointer-events: none;
    border-right: 1px solid var(--border-color);
    padding-right: 10px;
}

.phone-group input {
    padding-left: 64px !important;
}

.phone-group label {
    left: 64px;
}

/* Hide original placeholder so floating label works */
.input-group input::placeholder,
.input-group textarea::placeholder {
    color: transparent;
}

.form-submit-btn {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.form-submit-btn .ph-paper-plane-tilt {
    transition: transform 0.3s ease;
}

.form-submit-btn:hover .ph-paper-plane-tilt {
    transform: translate(4px, -4px);
}

/* Submitted state animation */
.animated-form.submitted .form-submit-btn span {
    opacity: 0;
}

.animated-form.submitted .form-submit-btn::after {
    content: "İletildi ✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #10B981;
    font-weight: 600;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-desc {
    color: #9CA3AF;
    font-size: 14px;
    line-height: 1.6;
}

.footer-links h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-inverse);
}

.footer-links a {
    display: block;
    color: #9CA3AF;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-inverse);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9CA3AF;
    font-size: 14px;
}

.socials {
    display: flex;
    gap: 16px;
}

.socials a {
    color: #9CA3AF;
    font-size: 20px;
    transition: var(--transition);
}

.socials a:hover {
    color: var(--text-inverse);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background-color: var(--text-primary);
    color: var(--text-inverse);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    text-decoration: none;
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

/* Animations */
.reveal-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-up.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Overrides */
@media (max-width: 992px) {
    .navbar {
        width: 95%;
        top: 16px;
    }

    .hero-title {
        font-size: 48px;
    }

    .features-grid,
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    /* Mobile Menu Logic: Drawer Style */
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--bg-surface);
        flex-direction: column;
        justify-content: center;
        gap: 40px;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 24px;
        font-weight: 600;
        color: var(--text-primary);
    }

    .nav-actions {
        display: none;
    }

    /* Section Mobile Fixes */
    .hero {
        padding-top: 120px;
        padding-bottom: 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .features-grid,
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .metrics-container {
        flex-direction: column;
        gap: 40px;
    }

    .metric-divider {
        width: 40px;
        height: 1px;
    }

    .cta-card {
    }
    
    .features-grid,
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}