/* =========================================================================
   BASE PRESETS & TOKENS
   ========================================================================= */
:root {
    /* Color Palette */
    --bg-dark: #050505;
    --bg-light: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent: #00E5FF;
    --accent-hover: #00b3cc;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-border: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing Grid (8px base) */
    --sp-1: 8px;
    --sp-2: 16px;
    --sp-3: 24px;
    --sp-4: 32px;
    --sp-5: 48px;
    --sp-6: 64px;
    --sp-8: 96px;
    --sp-10: 128px;

    /* Metrics */
    --max-width: 1200px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    /* Easing */
    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

html {
    scroll-behavior: smooth;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

/* =========================================================================
   UTILITIES
   ========================================================================= */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp-3);
}

.section-dark {
    background-color: var(--bg-dark);
    padding: var(--sp-10) 0;
}

.section-light {
    background-color: var(--bg-light);
    padding: var(--sp-10) 0;
}

.text-gradient {
    background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-1);
    padding: var(--sp-2) var(--sp-4);
    border-radius: 100px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-dark);
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.4);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--accent);
    padding: var(--sp-1) 0;
}
.btn-ghost i {
    transition: var(--transition);
}
.btn-ghost:hover i {
    transform: translateX(4px);
}

.btn-block {
    width: 100%;
}

/* =========================================================================
   NAVIGATION
   ========================================================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--sp-3) 0;
    z-index: 100;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(5, 5, 5, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    padding: var(--sp-2) 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--sp-3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
}

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

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

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

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

.nav-cta {
    padding: var(--sp-1) var(--sp-3);
    font-size: 0.9rem;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* =========================================================================
   HERO SECTION
   ========================================================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    animation: drift 20s infinite alternate ease-in-out;
}

.orb-1 {
    top: -100px;
    right: -100px;
    background: var(--accent);
}

.orb-2 {
    bottom: -200px;
    left: -200px;
    background: #7B2CBF; /* Purple minimal accent */
}

@keyframes drift {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.1); }
}

.hero-container {
    position: relative;
    z-index: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-subtitle {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: var(--sp-3);
    font-weight: 500;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5.5rem);
    letter-spacing: -1.5px;
    margin-bottom: var(--sp-4);
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--sp-5);
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--sp-2);
    justify-content: center;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--sp-5);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-1);
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-10px) translateX(-50%); }
    60% { transform: translateY(-5px) translateX(-50%); }
}

/* =========================================================================
   TRUST STRIP
   ========================================================================= */
.trust-strip {
    border-top: 1px solid var(--surface-border);
    border-bottom: 1px solid var(--surface-border);
    background-color: var(--bg-dark);
}

.trust-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--sp-4) var(--sp-3);
    flex-wrap: wrap;
    gap: var(--sp-3);
}

.trust-item {
    text-align: center;
    flex: 1;
    min-width: 150px;
}

.trust-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.trust-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

.trust-divider {
    width: 1px;
    height: 40px;
    background-color: var(--surface-border);
}

/* =========================================================================
   ABOUT SECTION
   ========================================================================= */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-8);
    align-items: center;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/5;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    transition: opacity 0.5s ease;
}

.image-placeholder:hover img {
    opacity: 1;
}

.profile-icon {
    position: absolute;
    font-size: 4rem;
    color: var(--surface-border);
    z-index: 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--sp-3);
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--sp-6);
    max-width: 600px;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--sp-5);
}

.about-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--sp-3);
    color: var(--text-primary);
}

.do-list {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
}

.do-list li {
    display: flex;
    gap: var(--sp-2);
    align-items: flex-start;
}

.do-list i {
    font-size: 1.5rem;
    margin-top: 4px;
}

.do-list strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 4px;
}

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

/* =========================================================================
   SKILLS SECTION
   ========================================================================= */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-4);
}

.skill-card {
    background-color: var(--surface);
    border: 1px solid var(--surface-border);
    padding: var(--sp-5);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.skill-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: var(--sp-3);
}

.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--sp-3);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-1);
}

.skill-tags span {
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border: 1px solid var(--surface-border);
}

/* =========================================================================
   PROJECTS SECTION
   ========================================================================= */
.projects-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
}

.project-card {
    background-color: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.project-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background-color: #111;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    opacity: 0.8;
}

.project-card:hover .project-image img {
    transform: scale(1.05);
    opacity: 1;
}

.project-info {
    padding: var(--sp-4);
}

.project-tags {
    display: flex;
    gap: var(--sp-1);
    margin-bottom: var(--sp-2);
}

.project-tags span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    font-weight: 600;
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: var(--sp-2);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--sp-3);
    line-height: 1.5;
}

/* Highlight (First Project) */
.project-card.highlight {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.project-card.highlight .project-image {
    height: 100%;
    min-height: 400px;
}

.project-card.highlight .project-info {
    padding: var(--sp-6);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-card.highlight .project-title {
    font-size: 2.25rem;
}

.project-card.highlight .project-desc {
    font-size: 1.1rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-4);
}

/* =========================================================================
   PROCESS SECTION
   ========================================================================= */
.text-center {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.process-steps {
    display: flex;
    justify-content: space-between;
    margin-top: var(--sp-6);
    position: relative;
}

.process-step {
    flex: 1;
    text-align: center;
    padding: 0 var(--sp-2);
    position: relative;
    z-index: 1;
}

.step-num {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
    line-height: 1;
    margin-bottom: -20px;
}

.step-icon {
    width: 60px;
    height: 60px;
    background-color: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent);
    margin: 0 auto var(--sp-3);
    position: relative;
    transition: var(--transition);
}

.process-step:hover .step-icon {
    background-color: var(--accent);
    color: var(--bg-dark);
    transform: scale(1.1);
}

.process-step h3 {
    margin-bottom: var(--sp-1);
    font-size: 1.2rem;
}

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

.step-connector {
    width: calc(33.33% - 60px);
    height: 1px;
    background: dashed 1px var(--surface-border);
    position: absolute;
    top: 70px;
    z-index: 0;
}

.process-steps .step-connector:nth-child(2) { left: 16.66%; }
.process-steps .step-connector:nth-child(4) { left: 50%; }
.process-steps .step-connector:nth-child(6) { left: 83.33%; }

/* =========================================================================
   PUBLICATIONS SECTION
   ========================================================================= */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
    max-width: 900px;
}

.publication-item {
    display: flex;
    gap: var(--sp-3);
    background-color: var(--surface);
    border: 1px solid var(--surface-border);
    padding: var(--sp-4);
    border-radius: var(--radius-md);
    transition: var(--transition);
    align-items: flex-start;
}

.publication-item:hover {
    border-color: var(--accent);
    transform: translateX(8px);
}

.pub-icon {
    font-size: 1.5rem;
    color: var(--accent);
}

.pub-content h3 {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.pub-meta {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* =========================================================================
   EXPERIENCE TIMELINE
   ========================================================================= */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--surface-border);
}

.timeline-item {
    position: relative;
    padding-left: var(--sp-5);
    margin-bottom: var(--sp-6);
}

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

.timeline-dot {
    position: absolute;
    left: -6px;
    top: 4px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background-color: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--sp-1);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 2px;
}

.timeline-content h4 {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--sp-2);
}

.timeline-content h4 span {
    font-size: 0.85rem;
    opacity: 0.7;
}

.timeline-content p {
    color: var(--text-secondary);
}

/* =========================================================================
   CONTACT SECTION
   ========================================================================= */
.contact {
    position: relative;
}

.contact-bg-glow {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 500px;
    height: 500px;
    background: var(--accent);
    filter: blur(200px);
    opacity: 0.05;
    pointer-events: none;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-8);
}

.contact-info .section-title {
    margin-bottom: var(--sp-2);
}

.contact-desc {
    color: var(--text-secondary);
    margin-bottom: var(--sp-5);
    font-size: 1.1rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
}

.contact-method-card {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-3);
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
}

.contact-method-card.whatsapp:hover {
    border-color: #25D366;
    transform: translateX(4px);
}

.contact-method-card:hover {
    border-color: var(--accent);
    transform: translateX(4px);
}

.contact-method-card i {
    font-size: 2rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.contact-method-card:hover i {
    color: var(--accent);
}

.contact-method-card.whatsapp:hover i {
    color: #25D366;
}

.contact-method-card h5 {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.contact-method-card p {
    font-weight: 500;
}

.contact-form {
    background: var(--surface);
    padding: var(--sp-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--surface-border);
}

.form-group {
    margin-bottom: var(--sp-3);
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--sp-1);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-sm);
    padding: var(--sp-2);
    color: var(--text-primary);
    font-family: var(--font-body);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(0, 0, 0, 0.4);
}

/* =========================================================================
   FOOTER
   ========================================================================= */
.footer {
    background: var(--bg-dark);
    padding: var(--sp-5) 0 var(--sp-3);
    border-top: 1px solid var(--surface-border);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--sp-4);
    flex-wrap: wrap;
    gap: var(--sp-3);
}

.footer-brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: var(--sp-4);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-social {
    display: flex;
    gap: var(--sp-2);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: var(--surface);
    border: 1px solid var(--surface-border);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.footer-social a:hover {
    background: var(--accent);
    color: var(--bg-dark);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.footer-copyright {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding-top: var(--sp-3);
    border-top: 1px solid var(--surface-border);
}

/* =========================================================================
   ANIMATIONS & RESPONSIVE
   ========================================================================= */
.fade-up-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right-element {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left-element {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.element-visible {
    opacity: 1;
    transform: translate(0);
}

/* Custom Cursor Glow */
.cursor-glow {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.05) 0%, rgba(0, 0, 0, 0) 70%);
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9999;
    transition: opacity 0.3s;
    opacity: 0;
}

@media (min-width: 1024px) {
    body:hover .cursor-glow {
        opacity: 1;
    }
}

/* Responsive Overrides */
@media (max-width: 992px) {
    .about-container, .contact-container {
        grid-template-columns: 1fr;
    }
    
    .project-card.highlight {
        grid-template-columns: 1fr;
    }
    
    .projects-grid, .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        flex-direction: column;
        gap: var(--sp-4);
    }
    
    .step-connector {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .projects-grid, .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .trust-container {
        gap: var(--sp-4);
    }
    
    .trust-divider {
        display: none;
    }
    
    .trust-item {
        min-width: 40%;
    }
}

/* =========================================================================
   FORM STATUS STYLES (AJAX Submission Feedback)
   ========================================================================= */
.form-status {
    margin-top: var(--sp-3);
    font-size: 0.95rem;
    padding: var(--sp-2) var(--sp-3);
    border-radius: var(--radius-sm);
    display: none;
    align-items: center;
    gap: var(--sp-1);
    animation: formStatusFadeIn 0.3s ease forwards;
}

.form-status.success {
    display: flex;
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid rgba(46, 204, 113, 0.25);
    color: #2ecc71;
}

.form-status.error {
    display: flex;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.25);
    color: #e74c3c;
}

@keyframes formStatusFadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}