/* ========================================
   Design System - Portfolio Spatial
   ======================================== */

:root {
    /* Colors - Space Theme */
    --color-space-dark: #0a0a1a;
    --color-space-deep: #0d1b2a;
    --color-nebula-purple: #7b2cbf;
    --color-nebula-pink: #e040fb;
    --color-nebula-blue: #3a86ff;
    --color-star-white: #ffffff;
    --color-star-warm: #ffd166;
    --color-accent: #00f5d4;
    --color-accent-secondary: #fee440;

    /* Glass Effect */
    --glass-bg: rgba(13, 27, 42, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* Typography - Space Theme Fonts */
    --font-primary: 'Exo 2', sans-serif;
    --font-heading: 'Orbitron', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 50%;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ========================================
   Reset & Base
   ======================================== */

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

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-primary);
    background: var(--color-space-dark);
    color: var(--color-star-white);
}

/* ========================================
   Canvas
   ======================================== */

#space-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ========================================
   UI Overlay
   ======================================== */

#ui-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

#ui-overlay>* {
    pointer-events: auto;
}

/* ========================================
   Glass Panel Effect
   ======================================== */

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
}

/* ========================================
   Instructions
   ======================================== */

#instructions {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
    opacity: 0.8;
    animation: fadeIn 0.6s ease 1s both;
}

#instructions p {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ========================================
   Content Panel
   ======================================== */

#content-panel {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    padding: var(--spacing-lg);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition:
        opacity var(--transition-normal),
        transform var(--transition-normal),
        visibility var(--transition-normal);
}

#content-panel.visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

#content-panel.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, -50%) scale(0.95);
}

.close-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-star-white);
    font-size: 1.5rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition:
        background var(--transition-fast),
        transform var(--transition-fast);
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

#panel-content h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-accent), var(--color-nebula-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#panel-content h3 {
    font-size: 1.25rem;
    color: var(--color-accent);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

#panel-content p {
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-sm);
}

#panel-content ul {
    list-style: none;
    padding-left: var(--spacing-sm);
}

#panel-content li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.85);
}

#panel-content li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ========================================
   Planet Navigation
   ======================================== */

#planet-nav {
    position: absolute;
    top: 50%;
    right: var(--spacing-md);
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-btn {
    width: 50px;
    height: 50px;
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.nav-btn:hover {
    transform: scale(1.15);
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(0, 245, 212, 0.3);
}

.nav-btn.active {
    border-color: var(--color-accent);
    box-shadow: 0 0 25px rgba(0, 245, 212, 0.5);
}

/* ========================================
   Loader
   ======================================== */

#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-space-dark);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-slow);
}

#loader.hidden {
    opacity: 0;
    pointer-events: none;
}

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

.loader-astronaut {
    font-size: 4rem;
    animation: float 2s ease-in-out infinite;
}

.loader-content p {
    margin-top: var(--spacing-md);
    font-family: var(--font-mono);
    color: var(--color-accent);
    animation: pulse 1.5s ease-in-out infinite;
}

/* ========================================
   Project Cards (for Projects section)
   ======================================== */

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.project-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    transition:
        transform var(--transition-fast),
        border-color var(--transition-fast);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-nebula-purple);
}

.project-card h4 {
    color: var(--color-star-white);
    margin-bottom: var(--spacing-xs);
}

.project-card p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.tag {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 0.25rem 0.5rem;
    background: rgba(123, 44, 191, 0.3);
    border-radius: var(--radius-sm);
    color: var(--color-nebula-pink);
}

/* ========================================
   Skills
   ======================================== */

.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.skill-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(58, 134, 255, 0.2), rgba(123, 44, 191, 0.2));
    border: 1px solid rgba(58, 134, 255, 0.3);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    transition: transform var(--transition-fast);
}

.skill-badge:hover {
    transform: scale(1.05);
}

/* ========================================
   Timeline (Experience/Education)
   ======================================== */

.timeline {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-nebula-purple));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--spacing-lg) - 5px);
    top: 0;
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    box-shadow: 0 0 10px var(--color-accent);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-size: 1.1rem;
    color: var(--color-star-white);
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    font-size: 0.9rem;
    color: var(--color-nebula-pink);
    margin-bottom: var(--spacing-xs);
}

/* ========================================
   Contact Form
   ======================================== */

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

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--color-star-white);
    text-decoration: none;
    transition:
        border-color var(--transition-fast),
        transform var(--transition-fast);
}

.contact-link:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }

    to {
        opacity: 0.9;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-15px);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* ========================================
   Responsive - Mobile First
   ======================================== */

/* Touch devices - hide mouse-only elements */
@media (hover: none) and (pointer: coarse) {
    /* Adjust for touch interactions */
    .nav-btn {
        width: 48px;
        height: 48px;
    }
    
    /* Make close button larger for touch */
    .close-btn {
        width: 48px;
        height: 48px;
        font-size: 1.75rem;
    }
}

/* Small screens */
@media (max-width: 768px) {
    #instructions {
        display: none; /* Hide on mobile - joystick is visible */
    }

    #planet-nav {
        top: auto;
        bottom: var(--spacing-lg);
        right: 50%;
        transform: translateX(50%);
        flex-direction: row;
        gap: var(--spacing-xs);
        padding: var(--spacing-xs);
        background: rgba(10, 10, 26, 0.7);
        border-radius: var(--radius-lg);
        backdrop-filter: blur(10px);
    }

    .nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    #content-panel {
        width: 95%;
        max-height: 70vh;
        padding: var(--spacing-md);
        top: 45%;
    }

    #panel-content h2 {
        font-size: 1.4rem;
    }
    
    #panel-content h3 {
        font-size: 1.1rem;
    }
    
    #panel-content p {
        font-size: 0.9rem;
    }
    
    .project-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-container {
        gap: var(--spacing-xs);
    }
    
    .skill-badge {
        font-size: 0.8rem;
        padding: 0.25rem 0.5rem;
    }
    
    .timeline {
        padding-left: var(--spacing-md);
    }
    
    .contact-links {
        flex-direction: column;
    }
}

/* Very small screens (phones) */
@media (max-width: 480px) {
    #planet-nav {
        bottom: 90px; /* Above joystick */
        gap: 4px;
    }
    
    .nav-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    #content-panel {
        width: 98%;
        max-height: 65vh;
        padding: var(--spacing-sm);
    }
    
    #panel-content h2 {
        font-size: 1.2rem;
    }
    
    .close-btn {
        width: 36px;
        height: 36px;
        font-size: 1.25rem;
    }
}

/* ========================================
   Scrollbar
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: var(--color-nebula-purple);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-nebula-pink);
}