/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    --color-text: #1a1a1a;
    --color-text-secondary: #4a4a4a;
    --color-text-light: #6a6a6a;
    --color-background: #ffffff;
    --color-background-alt: #f0f4f8;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-light: #dbeafe;
    --color-accent-subtle: #eff6ff;
    --color-secondary: #0891b2;
    --color-border: #cbd5e1;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    --max-width: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 3.5rem;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    font-weight: 600;
}

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

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

.section-alt {
    background-color: var(--color-background-alt);
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-intro {
    text-align: center;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.nav.scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.nav-logo:hover {
    color: var(--color-accent);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.nav-menu a:hover {
    color: var(--color-accent);
}

.nav-cta {
    background-color: var(--color-accent);
    color: var(--color-background) !important;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-cta:hover {
    background-color: var(--color-accent-hover);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition), opacity var(--transition);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: calc(70px + var(--spacing-xl));
    background: linear-gradient(135deg, var(--color-accent-subtle) 0%, var(--color-background) 50%, #f0fdfa 100%);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-background);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-md);
    align-items: center;
}

.about-text .lead {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-image {
    display: flex;
    justify-content: center;
}

.profile-placeholder {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent-subtle) 100%);
    border: 3px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 600;
    color: var(--color-accent);
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--color-background);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.12);
    border-top-color: var(--color-secondary);
}

.service-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Experience Section
   ========================================================================== */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.experience-card {
    text-align: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-accent-subtle) 0%, var(--color-background) 100%);
    border-radius: 8px;
}

.experience-metric {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.experience-label {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.experience-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.experience-timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    padding-left: var(--spacing-lg);
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-secondary) 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-md);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-lg) + 2px);
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--color-accent);
    border: 3px solid var(--color-background);
}

.timeline-content h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   How I Help Section
   ========================================================================== */
.help-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.help-item {
    background-color: var(--color-background);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.help-item:hover {
    border-left-color: var(--color-secondary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.help-item h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.help-item p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Resources Section
   ========================================================================== */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 700px;
    margin: 0 auto;
}

.resource-card {
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    border-bottom: 3px solid var(--color-secondary);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.resource-card:hover {
    border-bottom-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.resource-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.resource-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
}

.resource-link svg {
    transition: transform var(--transition);
}

.resource-link:hover svg {
    transform: translate(2px, -2px);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

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

.contact-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    transition: all var(--transition);
}

.contact-option:hover {
    border-color: var(--color-accent);
    background-color: var(--color-accent-subtle);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
    color: var(--color-text);
}

.contact-icon {
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.contact-details p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .experience-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-background);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-tagline {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        order: -1;
    }

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

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

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

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

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.25rem;
        --spacing-xl: 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .experience-metric {
        font-size: 2rem;
    }
}