/* 
   Andres Bolivar - Personal Webpage 
   Design System & Main Styles
*/

:root {
    /* Color Palette */
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F8F9FA;
    --color-text-primary: #1A1A1A;
    /* Charcoal */
    --color-text-secondary: #666666;
    --color-accent: #00BFFF;
    /* Vivid Electric Blue (Deep Sky Blue) */
    --color-accent-light: #5CE1E6;
    /* Bright Cyan/Teal */
    --color-accent-dark: #0077b6;
    --color-gold: #FFD700;
    /* Brighter Gold */

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-accent) 0%, #0077b6 100%);

    /* Typography */
    --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;

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

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

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Base Canvas for Background Animation */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 1.0;
    /* Fully visible, controlled by particle alpha */
    pointer-events: none;
}

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

    /* Protection: Prevent text selection and image dragging highlighting */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

    /* Protection: Prevent long-press context menu on mobile (iOS/Android) */
    -webkit-touch-callout: none;
}

/* Allow selection on input fields if any were present (none currently, but good practice) */
input,
textarea {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    /* Context for absolute positioning if needed */
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

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

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

/* Utilities */
.container {
    width: 90%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 128, 128, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 128, 128, 0.3);
}

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

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

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

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

/* Micro Interactions */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    transition: transform var(--transition-smooth);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 32px;
    /* Adjust based on logo aspect ratio */
    width: auto;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: radial-gradient(circle at 80% 20%, rgba(0, 128, 128, 0.05) 0%, transparent 40%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to right, var(--color-text-primary), #4a4a4a);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
    max-width: 500px;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg-secondary);
    display: flex;
    justify-content: center;
    align-items: flex-end;
    /* Align simple silhouette to bottom */
}

/* About Section */
.about {
    background: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-image img {
    border-radius: 8px;
    filter: grayscale(100%);
    opacity: 0.9;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    /* Subtle drop shadow */
    border: 1px solid rgba(255, 255, 255, 0.5);
    /* Soft border */
    transition: all 0.4s ease;
}

.about-image img:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 191, 255, 0.2);
    /* Soft blue glow on hover */
}

.section-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

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

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--color-text-primary);
    margin-bottom: 0;
}

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

/* Utilities */
.text-gold {
    color: var(--color-accent);
}

/* Skills & Expertise Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.skill-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-fast);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border-color: var(--color-accent);
}

.skill-icon {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    background: rgba(0, 191, 255, 0.05);
    /* Very subtle blue bg */
    padding: 12px;
    border-radius: 8px;
    display: inline-flex;
}

.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.skill-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Certifications Section (Legacy/Removed but keeping class if needed for ref) */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.cert-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-accent);
    /* Gold top border */
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.cert-card:hover::before {
    transform: scaleX(1);
}

.cert-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.cert-card h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.cert-card p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Ventures / Projects */
.ventures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.venture-card {
    background: var(--color-bg);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    padding: var(--spacing-md);
    transition: all var(--transition-fast);
}

.venture-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    border-color: var(--color-accent);
}

.venture-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.venture-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--color-accent);
}

.venture-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: rgba(0, 128, 128, 0.1);
    color: var(--color-accent);
    padding: 4px 8px;
    border-radius: 4px;
}

.venture-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

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

/* Contact / Footer */
.footer {
    background: #0f172a;
    /* Dark footer for contrast */
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

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

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    /* Increased from 44px */
    height: 56px;
    /* Increased from 44px */
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    font-size: 1.5rem;
    /* Increased from 1.2rem */
    transition: all var(--transition-fast);
    color: white;
    /* Default white icon */
}

/* Specific Brand Colors on Hover */
.social-link:hover {
    background: white;
    border-color: white;
    transform: translateY(-3px);
}

.social-link.whatsapp:hover {
    color: #25D366;
}

.social-link.telegram:hover {
    color: #0088cc;
}

.social-link.signal:hover {
    color: #3A76F0;
}

.social-link.instagram:hover {
    color: #E4405F;
}

.social-link.linkedin:hover {
    color: #0077b5;
}

.social-link.x:hover {
    color: #000000;
}

.social-link.github:hover {
    color: #333;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 900px) {

    .hero-grid,
    .about-grid,
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-image-wrapper {
        order: -1;
        width: 80%;
        margin: 0 auto;
    }
}

/* Mobile Save Contact Button */
.mobile-contact-btn-wrapper {
    display: none;
    /* Hidden by default on desktop */
    margin-top: var(--spacing-md);
}

.btn-save-contact {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 191, 255, 0.1);
    color: var(--color-accent);
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    border: 1px solid rgba(0, 191, 255, 0.2);
}

.btn-save-contact:hover {
    background: var(--color-accent);
    color: white;
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .mobile-contact-btn-wrapper {
        display: block;
        /* Show only on mobile/tablet */
    }

    .hero-actions {
        display: flex;
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

    .hero-actions .btn {
        width: 100%;
        text-align: center;
        margin-left: 0 !important;
    }

    .footer-mobile-save-contact {
        display: inline-flex !important;
        /* using inline-flex for better alignment */
        width: 100%;
        /* Full width on mobile to match other buttons */
        justify-content: center;
        margin-left: 0 !important;
        /* Reset margin */
        margin-top: 10px;
        /* Space between buttons */
    }

    /* Ensure Email Me button is also full width */
    .footer .btn {
        width: 100%;
        text-align: center;
        margin-left: 0;
    }

    /* Header Mobile Adjustments */
    .main-header {
        height: auto;
        /* Allow height to expand */
        padding: 15px 0;
    }

    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        gap: 20px;
        font-size: 0.85rem;
    }

    .hero {
        padding-top: 140px;
        /* Increased padding to account for stacked header */
    }
}