/* ============================================
   BOYLU ENERJİ YAPI A.Ş. - MODERN CSS
   Modern, Professional Construction Company Website
   Version: 2.0
   Author: Ysf Software
============================================ */

/* ============================================
   CSS VARIABLES
============================================ */
:root {
    /* Primary Colors */
    --primary-color: #1a365d;
    --secondary-color: #f59e0b;
    --accent-color: #0ea5e9;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Neutral Colors */
    --dark: #0f172a;
    --gray-dark: #334155;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --light: #f8fafc;
    --white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1a365d 0%, #2563eb 100%);
    --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-secondary: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    --gradient-overlay: linear-gradient(to top, rgba(26, 54, 93, 0.95) 0%, rgba(14, 165, 233, 0.8) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.20);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
}

/* ============================================
   GLOBAL RESET & BASE STYLES
============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--dark);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--gray-dark);
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: all var(--transition-base);
}

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

/* ============================================
   UTILITY CLASSES
============================================ */
.container-custom {
    width: 100%;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: 100px 0;
}

.section-padding-sm {
    padding: 60px 0;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   BUTTONS
============================================ */
.btn-modern {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 14px 32px;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-modern:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary-modern {
    background: var(--gradient-gold);
    color: var(--white);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.35);
}

.btn-primary-modern:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(245, 158, 11, 0.45);
    color: var(--white);
}

.btn-secondary-modern {
    background: var(--gradient-secondary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-secondary-modern:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.btn-outline-modern {
    background: transparent;
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color);
}

.btn-outline-modern:hover {
    background: var(--secondary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.btn-accent-modern {
    background: var(--gradient-accent);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-accent-modern:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

/* ============================================
   CARDS
============================================ */
.card-modern {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card-modern:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-modern-image {
    width: 100%;
    height: 250px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.card-modern-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card-modern:hover .card-modern-image img {
    transform: scale(1.1);
}

/* ============================================
   BADGES
============================================ */
.badge-modern {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(14, 165, 233, 0.1);
    color: var(--secondary-color);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid rgba(14, 165, 233, 0.2);
}

.badge-accent {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-color);
    border-color: rgba(245, 158, 11, 0.2);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-color: rgba(16, 185, 129, 0.2);
}

/* ============================================
   FORMS
============================================ */
.form-modern {
    width: 100%;
}

.form-group-modern {
    margin-bottom: var(--spacing-lg);
}

.form-label-modern {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
}

.form-control-modern {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--white);
}

.form-control-modern:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

.form-control-modern::placeholder {
    color: var(--gray);
}

textarea.form-control-modern {
    min-height: 150px;
    resize: vertical;
}

/* ============================================
   ANIMATIONS
============================================ */
@@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.8s ease-out;
}

.animate-fadeInDown {
    animation: fadeInDown 0.8s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* ============================================
   LOADING STATES
============================================ */
.skeleton-loader {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ============================================
   OVERLAY
============================================ */
.overlay-modern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.overlay-modern.show {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   RESPONSIVE IMAGES
============================================ */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.img-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-contain {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ============================================
   DIVIDERS
============================================ */
.divider-modern {
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--gray-light), transparent);
    margin: var(--spacing-2xl) 0;
}

.divider-gradient {
    background: var(--gradient-primary);
}

/* ============================================
   RESPONSIVE DESIGN
============================================ */
@@media (max-width: 1400px) {
    .container-custom {
        max-width: 1140px;
    }
}

@@media (max-width: 1200px) {
    .container-custom {
        max-width: 960px;
    }
}

@@media (max-width: 992px) {
    .container-custom {
        max-width: 720px;
    }
    
    .section-padding {
        padding: 80px 0;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
}

@@media (max-width: 768px) {
    .container-custom {
        max-width: 540px;
    }
    
    .section-padding {
        padding: 60px 0;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .btn-modern {
        padding: 12px 24px;
        font-size: 0.95rem;
    }
}

@@media (max-width: 576px) {
    html {
        font-size: 14px;
    }
    
    .section-padding {
        padding: 40px 0;
    }
    
    .card-modern {
        padding: var(--spacing-lg);
    }
}

/* ============================================
   PRINT STYLES
============================================ */
@@media print {
    *, *::before, *::after {
        background: transparent !important;
        color: #000 !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a, a:visited {
        text-decoration: underline;
    }
    
    img {
        page-break-inside: avoid;
    }
    
    h2, h3, p {
        orphans: 3;
        widows: 3;
    }
    
    h2, h3 {
        page-break-after: avoid;
    }
}

/* ============================================
   ACCESSIBILITY
============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 3px solid var(--secondary-color);
    outline-offset: 3px;
}

/* ============================================
   PREFERS REDUCED MOTION
============================================ */
@@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   DARK MODE SUPPORT (Future)
============================================ */
@@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here in future updates */
}

