/* ===================================
   CSS Custom Properties (Design Tokens)
   =================================== */
:root {
    /* Colors */
    --navy-blue: #041e43;
    --navy-blue-light: #0d3a78;
    --navy-blue-dark: #020f23;
    --off-white: #FAFAFF;
    --white: #FFFFFF;
    --auxiliary-blue: #98B5D9;
    --accent-gold: #F0C571;
    --gray: #6B7280;

    /* Semantic Mappings */
    --primary: var(--navy-blue);
    --primary-light: var(--navy-blue-light);
    --primary-dark: var(--navy-blue-dark);
    --secondary: var(--auxiliary-blue);
    --accent: var(--accent-gold);

    --bg-body: var(--white);
    --bg-alt: var(--off-white);
    --text-main: var(--navy-blue);
    --text-light: var(--gray);
    --border-color: var(--auxiliary-blue);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --header-height: 80px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(4, 30, 67, 0.05);
    --shadow-md: 0 4px 6px rgba(4, 30, 67, 0.07);
    --shadow-lg: 0 10px 25px rgba(4, 30, 67, 0.1);
    --shadow-xl: 0 20px 40px rgba(4, 30, 67, 0.15);
}

/* ===================================
   Reset & Base Styles
   =================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===================================
   Utility Classes
   =================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.highlight {
    color: var(--accent);
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.5px;
    border-radius: 50px;
    transition: all var(--transition-base);
}

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

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}


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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   Section Styles
   =================================== */
.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    margin-bottom: var(--spacing-3xl);
}

/* ===================================
   Portfolio Section
   =================================== */
.work {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-body);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.portfolio-item {
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    background-color: var(--bg-alt);
    height: 250px;
}

.portfolio-item.large {
    grid-column: span 2;
    grid-row: span 2;
    height: 516px;
}

.portfolio-item.tall {
    grid-row: span 2;
    height: 516px;
}

.portfolio-item.wide {
    grid-column: span 2;
    height: 250px;
}

.portfolio-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

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

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

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-xl);
    background: linear-gradient(to top, rgba(4, 30, 67, 0.9), transparent);
    color: var(--white);
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

.portfolio-overlay h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.portfolio-overlay p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    color: var(--auxiliary-blue);
}

/* ===================================
   About Section
   =================================== */

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-body);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg);
    font-family: inherit;
    font-size: var(--font-size-base);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--white);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(4, 30, 67, 0.1);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-light);
    transition: all var(--transition-base);
}

.social-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

.social-link svg {
    width: 22px;
    height: 22px;
}

.contact-email {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--text-main);
}

/* ===================================
   WhatsApp Widget (sabit buton)
   =================================== */
.whatsapp-widget {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 60px;
    height: 60px;
    background-color: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: all var(--transition-base);
    animation: pulse 2s infinite;
}

.whatsapp-widget:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4);
}

.whatsapp-widget svg {
    width: 30px;
    height: 30px;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
    }

    50% {
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
    }
}


/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-item.large {
        grid-column: span 2;
        grid-row: span 1;
    }

    .portfolio-item.tall {
        grid-row: span 1;
    }




}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-item.large,
    .portfolio-item.wide {
        grid-column: span 1;
    }



    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .contact-info {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .whatsapp-widget {
        width: 50px;
        height: 50px;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }

    .whatsapp-widget svg {
        width: 24px;
        height: 24px;
    }
}