/* ========================================
   Portfolio - Main Stylesheet
   Dark theme with Animations & Wider Layout
   ======================================== */

/* ---------- CSS Variables ---------- */
:root {
    /* Colors - Dark Theme (Blue/Grey based) */
    --bg-primary: #0f1115;
    --bg-secondary: #16181d;
    --bg-card: #1c1f26;
    --bg-card-hover: #22252e;
    --bg-input: #15171e;

    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Accent Colors */
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-dim: rgba(59, 130, 246, 0.1);

    /* Contact Button specific */
    --btn-white: #f1f5f9;
    --btn-white-hover: #e2e8f0;
    --btn-text: #0f172a;

    --border: #2d3748;
    --border-light: rgba(255, 255, 255, 0.05);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --container-width: 1400px;
    --section-padding: 7rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    /* Background handled by Three.js canvas */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100vh;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    /* Let clicks pass through if needed, though we track mousemove on document */
}

::selection {
    background-color: var(--accent);
    color: white;
}

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

h1 {
    font-size: 4.5rem;
}

h2 {
    font-size: 2.75rem;
}

h3 {
    font-size: 1.35rem;
}

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

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

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

ul {
    list-style: none;
}

/* ---------- Layout ---------- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 4rem;
    /* Wide padding */
}

/* Narrow container class removed to allow full width spreading */

section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.75rem;
    margin-bottom: 2.5rem;
    color: var(--text-primary);
}

/* ---------- Navigation (Floating Pill) ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 2.5rem 0;
    transition: all var(--transition-base);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-base);
}

.nav-logo {
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    opacity: 1;
    transform: translateX(0);
    transition: all var(--transition-base);
    flex-shrink: 0;
    /* Prevent shrinking */
    margin-right: auto;
    /* Push links to the right if space allows, though flex space-between does this too */
}

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

.nav-links {
    display: flex;
    gap: 3rem;
    transition: all var(--transition-base);
}

.nav-link {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

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

/* Scrolled State */
.nav.scrolled {
    padding: 1.5rem 0;
}

.nav.scrolled .nav-container {
    max-width: fit-content;
    padding: 0.85rem 2.5rem;
    background: rgba(28, 31, 38, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9999px;
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.8);
}

.nav.scrolled .nav-logo {
    width: 0;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
    margin: 0;
}

.nav.scrolled .nav-links {
    gap: 2.5rem;
    margin: 0;
}

/* ---------- Hero Section ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-name {
    font-size: clamp(4rem, 12vw, 7.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 2rem;
    color: var(--text-primary);
    line-height: 1.1;
}

.hero-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--text-secondary);
    font-weight: 400;
}

/* ---------- About Section ---------- */
/* Using standard container for full width spread */
.about-content {
    /* Limit width slightly just for reading comfort but keeping it left aligned */
    max-width: 100%;
    /* Allow spread */
}

/* About Grid optionally for wider screens? 
   Actually user said "let it spread a little more sideways".
   Standard text tends to look bad if TOO wide.
   Let's set a comfortable max-width like 900px but keep it left aligned.
*/
.about-text {
    font-size: 1.25rem;
    line-height: 1.85;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    max-width: 1100px;
    /* Allow it to spread more as requested */
}

.about-highlight {
    color: var(--text-primary);
    font-weight: 600;
}

.social-links {
    display: flex;
    gap: 1.25rem;
    margin-top: 3rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Resume Button in About */
.resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1.5rem;
    height: 50px;
    /* Match social icons height */
    background: var(--btn-white);
    color: var(--btn-text);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: all var(--transition-fast);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.resume-btn:hover {
    background: var(--btn-white-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
}

.resume-btn svg {
    transition: transform var(--transition-fast);
}

.resume-btn:hover svg {
    transform: translateY(2px);
}

/* Highlight Nav Link */
.nav-link.highlight {
    color: var(--accent);
    border: 1px solid var(--border);
    padding: 0.4rem 1rem;
    border-radius: 6px;
    margin-left: 0.5rem;
    transition: all var(--transition-fast);
}

.nav-link.highlight:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--accent);
}

/* ---------- Projects Section ---------- */
.project-filters {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.6rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.filter-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.filter-btn.active {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 100%;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.project-card.hidden-project {
    display: none;
}

.project-card.hidden-project.show {
    display: flex;
}

.project-header {
    margin-bottom: 1.25rem;
}

.project-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.project-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    background: #0f1115;
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.project-description {
    font-size: 1rem;
    line-height: 1.65;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
    flex-grow: 1;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.project-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    background: #252830;
    border: none;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.project-btn:hover {
    background: #30343e;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: auto;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: #0f1115;
    padding: 0.35rem 0.6rem;
    border-radius: 4px;
    font-weight: 500;
}

/* Show More Button */
.show-more-container {
    display: flex;
    justify-content: center;
    margin-top: 4rem;
}

.show-more-btn {
    padding: 0.85rem 2.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.show-more-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--text-muted);
}

/* ---------- Skills Section (Updated to Vertical Layout) ---------- */
.skills-container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.skill-row {
    display: flex;
    flex-direction: column;
    /* Vertical alignment */
    align-items: flex-start;
    /* Left align */
    gap: 1rem;
}

.skill-row-label {
    min-width: auto;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-item {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 99px;
    transition: all var(--transition-fast);
}

.skill-item:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.skill-item img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.skill-item.skill-text {
    background: var(--bg-card);
}

/* ---------- Contact Section ---------- */
.contact {
    padding: 10rem 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8rem;
    align-items: start;
}

.contact-info .section-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.contact-text {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: 3.5rem;
    color: var(--text-secondary);
    max-width: 450px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--accent);
    margin-top: 4px;
    width: 24px;
    height: 24px;
}

.contact-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.contact-value {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 600;
}

.contact-value.location-text {
    color: var(--accent);
}

/* Contact Form Container */
.contact-form-container {
    background: #16181d;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1.1rem 1.35rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: #0f1115 !important;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: #4b5563;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: #0f1115;
}

.form-submit {
    padding: 1.1rem 2.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--btn-text);
    background: var(--btn-white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: 0.75rem;
}

.form-submit:hover {
    background: var(--btn-white-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1);
}

/* ---------- Footer ---------- */
.footer {
    padding: 4rem 0;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* ---------- ANIMATIONS ---------- */
.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 3rem;
    }

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

@media (max-width: 900px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .contact-form-container {
        padding: 2rem;
    }

    .contact-form-container {
        padding: 2rem;
    }

    /* Hide Resume link in Nav on mobile/tablet, keep button in About */
    .nav-link.highlight {
        display: none;
    }

    h1 {
        font-size: 4rem;
    }

    .social-links {
        flex-wrap: wrap;
        /* Allow wrapping on small screens */
    }

    .resume-btn {
        width: 100%;
        /* Full width on mobile for better touch target */
        justify-content: center;
        margin-top: 0.5rem;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 1.5rem;
    }

    .nav-container {
        padding: 0 1.5rem;
        gap: 1rem;
        /* Ensure space between logo and links */
    }

    /* Hide Home link on mobile to save space (Logo is home) */
    .nav-link[href="#hero"] {
        display: none;
    }

    .nav-links {
        gap: 1.5rem;
        /* Reduce gap between links */
    }

    .nav-link {
        font-size: 0.9rem;
        /* Slightly smaller text */
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }
}
/* Experience section — a single full-width entry, not a grid column */
#experienceGrid {
    grid-template-columns: 1fr;
}

#experienceGrid .project-card .project-description + .project-description {
    margin-top: 0.9rem;
}