/* ===================================
   CSS Variables / Modern Premium Theme
   =================================== */
:root {
    /* Color Palette - Minimal & Premium */
    --primary-color: #1d1d1f;
    --secondary-color: #0071e3;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --background: #ffffff;
    --background-alt: #f5f5f7;
    --border-color: #d2d2d7;
    --overlay: rgba(0, 0, 0, 0.5);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 2.5rem;
    --font-size-3xl: 3.5rem;
    --font-size-4xl: 4.5rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;

    /* Effects */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
    --blur: 20px;

    /* Layout */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 18px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
}

/* ===================================
   Global Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(var(--blur));
    -webkit-backdrop-filter: saturate(180%) blur(var(--blur));
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: var(--spacing-sm) 0;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.navbar-nav .nav-link {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    margin: 0 var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--text-primary);
    background: var(--background-alt);
}

.navbar-toggler {
    border: none;
    padding: var(--spacing-xs);
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    background-image:
        linear-gradient(
            135deg,
            rgba(0, 0, 0, 0.7) 0%,
            rgba(0, 0, 0, 0.4) 50%,
            rgba(0, 0, 0, 0.6) 100%
        ),
        url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?q=80&w=2940&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 980px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.hero-greeting {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, var(--font-size-4xl));
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, var(--font-size-xl));
    font-weight: 500;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: var(--font-size-md);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-xs);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), transparent);
    animation: scrollAnimation 2s infinite;
}

@keyframes scrollAnimation {
    0%, 100% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

/* ===================================
   Section Common Styles
   =================================== */
section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 4vw, var(--font-size-3xl));
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
}

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

.section-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

/* ===================================
   About Section
   =================================== */
.about-section {
    background: var(--background);
}

.about-image {
    position: relative;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
    border: 3px solid #000000;
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

.about-content {
    padding: var(--spacing-md);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.skill-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--background-alt);
    border: 1px solid #000000;
    border-radius: var(--border-radius-md);
    transition: var(--transition);
}

.skill-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
    border-color: #000000;
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background);
    border-radius: var(--border-radius-sm);
    font-size: 1.25rem;
    color: var(--secondary-color);
    flex-shrink: 0;
}

.skill-info h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.skill-info p {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin: 0;
}

.about-actions {
    margin-top: var(--spacing-lg);
}

/* ===================================
   Services Section
   =================================== */
.services-section {
    background: var(--background-alt);
}

.service-card {
    background: var(--background);
    border: 2px solid #000000;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
    height: 100%;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
    border-color: #000000;
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-alt);
    border-radius: var(--border-radius-md);
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ===================================
   Pricing Section
   =================================== */
.pricing-section {
    background: var(--background);
}

.pricing-card {
    background: var(--background);
    border: 2px solid #000000;
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
    height: 100%;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

.pricing-card.featured {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--background);
}

.pricing-card.featured .pricing-header h3,
.pricing-card.featured .pricing-price,
.pricing-card.featured .pricing-period,
.pricing-card.featured .pricing-features li {
    color: var(--background);
}

.pricing-card.featured .pricing-features li.unavailable {
    color: rgba(255, 255, 255, 0.5);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary-color);
    color: var(--background);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    white-space: nowrap;
}

.pricing-header {
    text-align: center;
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.pricing-card.featured .pricing-header {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.pricing-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.pricing-price {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    margin-bottom: var(--spacing-xs);
}

.pricing-price .currency {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-right: 0.25rem;
    margin-top: 0.5rem;
}

.pricing-price .amount {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1;
}

.pricing-price .amount-custom {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.pricing-period {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin: 0;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-lg);
}

.pricing-features li {
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.pricing-features li i {
    width: 20px;
    text-align: center;
    color: var(--secondary-color);
}

.pricing-card.featured .pricing-features li i {
    color: var(--background);
}

.pricing-features li.unavailable {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    background: var(--background-alt);
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background);
    border-radius: var(--border-radius-md);
    font-size: 1.25rem;
    color: var(--secondary-color);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-details p,
.contact-details a {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.contact-details a:hover {
    color: var(--secondary-color);
}

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

.social-links a {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    color: var(--text-primary);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--background);
    transform: translateY(-2px);
}

.contact-map {
    background: var(--background);
    border: 2px solid #000000;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    min-height: 450px;
    height: 450px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

#map {
    width: 100%;
    height: 100%;
    z-index: 1;
}

.leaflet-control-attribution {
    font-size: 10px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--text-primary);
    color: var(--background);
    padding: var(--spacing-lg) 0;
}

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

.footer-content p {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xs);
}

.footer-credit {
    opacity: 0.6;
}

.footer-credit a {
    color: var(--background);
    text-decoration: underline;
}

.footer-credit a:hover {
    opacity: 0.8;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--border-radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--background);
}

.btn-primary:hover {
    background: #0077ed;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--background);
}

.btn-secondary {
    background: transparent;
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
}

.btn-secondary:hover {
    background: var(--secondary-color);
    color: var(--background);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--text-primary);
    color: var(--background);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

.pricing-card.featured .btn-outline {
    color: var(--background);
    border-color: rgba(255, 255, 255, 0.3);
}

.pricing-card.featured .btn-outline:hover {
    background: var(--background);
    color: var(--text-primary);
    border-color: var(--background);
}

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top-btn {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 48px;
    height: 48px;
    background: var(--text-primary);
    color: var(--background);
    border: none;
    border-radius: var(--border-radius-full);
    font-size: 1rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 991px) {
    :root {
        --spacing-xl: 4rem;
        --spacing-2xl: 5rem;
    }

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

    .hero-section {
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
}

@media (max-width: 767px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-2xl: 4rem;
    }

    section {
        padding: var(--spacing-xl) 0;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .about-content {
        padding: 0;
    }

    .contact-map {
        min-height: 300px;
    }
}

@media (max-width: 575px) {
    .skills-grid {
        gap: var(--spacing-sm);
    }

    .skill-item {
        padding: var(--spacing-sm);
    }

    .service-card,
    .pricing-card {
        padding: var(--spacing-md);
    }
}

/* ===================================
   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;
}

a:focus,
button:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

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

@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;
    }
}