@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;500;700&display=swap');

html {
  scroll-behavior: smooth;
}

:root {
    --bg: #050505;
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --primary: #8a2be2;
    --primary-soft: rgba(138, 43, 226, 0.3);
    --card-bg: #0f0f0f;
    --border: rgba(255, 255, 255, 0.08);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; cursor: none; }

/* --- Smooth Transitions & Focus States --- */
a, button, .btn, .filter-btn {
    transition: var(--transition);
    outline: none;
}

a:focus-visible, button:focus-visible, .btn:focus-visible, .filter-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* light mode variables (nice-to-have toggle) */
body.light {
    --bg: #ffffff;
    --text-main: #050505;
    --text-muted: #555555;
    --primary: #8a2be2;
    --primary-soft: rgba(138, 43, 226, 0.3);
    --card-bg: #f7f7f7;
    --border: rgba(0, 0, 0, 0.08);
}

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
    animation: page-load 0.5s ease-out;
}

/* --- Container & Layout --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Navigation --- */
nav {
    position: fixed; top: 0; width: 100%;
    padding: 30px 50px;
    display: flex; justify-content: space-between; align-items: center;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(5, 5, 5, 0.7);
    border-bottom: 1px solid var(--border);
    transition: transform 0.3s ease;
}

.logo {
    font-weight: 700;
    letter-spacing: -0.5px;
    font-size: 1.1rem;
}

#theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.3s;
}
#theme-toggle:hover {
    color: var(--primary);
}

#theme-icon {
    transition: transform 0.3s;
}
body.light #theme-icon {
    transform: rotate(360deg);
}

nav > #theme-toggle {
    margin-left: 20px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 40px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a.active { color: var(--primary); font-weight: 700; }

/* --- Hero Section --- */
header {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 60px;
}

.overline {
    color: var(--primary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 20px;
}

h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 30px;
}

.text-gradient {
    background: linear-gradient(to right, #fff, #a78bfa);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 50px;
}

/* Image Styling */
.image-wrapper {
    width: 350px;
    height: 450px;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 80px -20px rgba(0,0,0,0.8);
}
.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
    transition: 0.5s ease;
}
.image-wrapper:hover img { filter: grayscale(0%); transform: scale(1.05); }

/* Buttons */
.btn-group { display: flex; gap: 20px; }

.btn {
    position: relative;
    overflow: hidden;
}


.btn .ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: ripple 0.6s linear;
    background: rgba(255,255,255,0.7);
    pointer-events: none;
}

@keyframes ripple {
    to { transform: scale(4); opacity: 0; }
}

.btn {
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.btn-primary {
    background: var(--text-main);
    color: var(--bg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.btn-primary:hover {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 30px var(--primary-soft);
    transform: translateY(-2px);
}
.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    border: 1px solid var(--border);
    color: var(--text-main);
    background: transparent;
}
.btn-secondary:hover {
    border-color: var(--text-main);
    background: rgba(255,255,255,0.05);
    transform: translateY(-2px);
}
.btn-secondary:active {
    transform: translateY(0);
}

/* --- Sections General --- */
section { padding: 120px 0; }

.section-header {
    margin-bottom: 80px;
}
.section-header h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}
.section-header .line {
    width: 60px;
    height: 2px;
    background: var(--primary);
}

/* --- Experience Timeline --- */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--primary);
    top: 0;
}

.timeline-item {
    margin-bottom: 50px;
    width: 45%;
}

.timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
    padding-right: 60px;
}

.timeline-item:nth-child(even) {
    margin-left: 55%;
    text-align: left;
    padding-left: 60px;
}

.timeline-marker {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: 4px solid var(--bg);
    border-radius: 50%;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    z-index: 10;
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-marker {
    width: 30px;
    height: 30px;
    top: -5px;
    box-shadow: 0 0 20px rgba(138, 43, 226, 0.5);
}

.timeline-content {
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-content {
    border-color: var(--primary);
    box-shadow: 0 5px 20px rgba(138, 43, 226, 0.1);
}

.timeline-content h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color:var(--text-main);
}

.timeline-date {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

/* Mobile timeline */
@media (max-width: 768px) {
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        width: 100%;
        margin-left: 0;
        padding-left: 60px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-marker {
        left: 15px;
    }
}

/* --- Expandable Card Click Hint --- */
.reveal-hint {
    display: block;
    margin-top: 15px;
    color: var(--primary);
    font-size: 0.8rem;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.card:hover .reveal-hint {
    opacity: 1;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* --- Skill Card Badges --- */
.skill-card small {
    display: block;
    margin-top: 8px;
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* --- Tech Grid --- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: 0.4s ease;
}

.card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.5);
}

.icon-box {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 25px;
}

.card h3 { margin-bottom: 15px; font-size: 1.2rem; }
.card p { color: var(--text-muted); font-size: 0.95rem; }

/* --- Skills Section --- */
.skills-section {
    margin-top: 80px;
    text-align: center;
}

.skills-section h3 {
    font-size: 1.5rem;
    margin-bottom: 40px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.skill {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.skill span {
    margin-top: 15px;
    font-weight: 500;
    text-align: center;
}

.progress-circle {
    transform: rotate(-90deg);
}

.progress-circle-fill {
    transition: stroke-dashoffset 2s ease;
}

/* --- Project Grid --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 40px;
}

/* cards should stack image on top always */
.project-card {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.project-image {
    width: 100%;
    height: 300px;
    background: #111;
}
.project-content {
    padding: 40px 60px;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--text-main);
    background: rgba(138, 43, 226, 0.1);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(138, 43, 226, 0.3);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--card-bg);
    border-radius: 24px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}
.project-card.hidden {
    opacity: 0;
    pointer-events: none;
    height: 0;
    margin: 0;
    padding: 0;
}

.project-card:hover {
    border-color: var(--primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(138, 43, 226, 0.15);
}

.project-image {
    width: 100%;
    /* height defined earlier for desktop fixed block and reduced in mobile */
    background: #111;
}
.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: transform 0.7s ease, opacity 0.5s ease;
}
.project-image img.loaded {
    opacity: 1;
}
.project-card:hover .project-image img { transform: scale(1.03); }

.project-content { padding: 60px; }

.tag {
    display: inline-block;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-content h3 { font-size: 2rem; margin-bottom: 15px; line-height: 1.2; font-weight: 600; }
.project-content p { color: var(--text-muted); margin-bottom: 25px; font-size: 1rem; line-height: 1.6; }

.tech-list {
    list-style: none;
    display: flex;
    gap: 15px;
}
.tech-list li {
    font-size: 0.85rem;
    background: rgba(255,255,255,0.05);
    padding: 8px 16px;
    border-radius: 50px;
    color: var(--text-main);
}

.view-details {
    margin-top: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px !important;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), #a78bfa) !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(138, 43, 226, 0.3);
    transition: all 0.3s ease;
}
.view-details:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(138, 43, 226, 0.5) !important;
    background: linear-gradient(135deg, #a78bfa, var(--primary)) !important;
}
.view-details:active {
    transform: translateY(0);
}

/* --- Contact --- */
.contact-container { text-align: center; }
.contact-container h2 { font-size: 3rem; margin-bottom: 20px; }
.email-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    color: var(--text-main);
    text-decoration: none;
    margin-top: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 10px;
    transition: 0.3s;
}
.email-link:hover { color: var(--primary); border-color: var(--primary); }

.socials {
    margin-top: 50px;
    display: flex;
    justify-content: center;
    gap: 30px;
    font-size: 1.5rem;
}
.socials a { color: var(--text-muted); transition: 0.3s; }
.socials a:hover { color: var(--text-main); transform: translateY(-3px); }

footer { padding: 50px; text-align: center; color: #444; font-size: 0.9rem; }

/* --- Animations & Utilities --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.active { 
    opacity: 1; 
    transform: translateY(0); 
    animation: subtle-glow 2s ease-in-out;
}

@keyframes subtle-glow {
    0%, 100% { box-shadow: 0 0 0 rgba(138, 43, 226, 0); }
    50% { box-shadow: 0 0 20px rgba(138, 43, 226, 0.1); }
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* --- Custom Cursor --- */
#cursor-dot {
    position: fixed; width: 6px; height: 6px; background: white; border-radius: 50%; pointer-events: none; z-index: 9999;
}
#cursor-ring {
    position: fixed; width: 30px; height: 30px; border: 1px solid rgba(255,255,255,0.3); border-radius: 50%; pointer-events: none; z-index: 9998;
    transition: width 0.3s, height 0.3s, background 0.3s;
}
body.hovering #cursor-ring {
    width: 50px; height: 50px; background: rgba(255,255,255,0.05); border-color: transparent;
}

/* --- Confetti --- */
@keyframes fall {
    to { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}
.confetti {
    position: fixed;
    width: 8px;
    height: 8px;
    top: -10px;
    z-index: 3000;
    animation: fall 2s forwards;
}

/* --- Progress Bar --- */
#progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), #a78bfa);
    z-index: 1000;
    transition: width 0.2s ease;
    box-shadow: 0 0 10px var(--primary-soft);
}

/* --- Page Load Animation --- */
@keyframes page-load {
    0% { 
        opacity: 0;
        transform: translateY(10px);
    }
    100% { 
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Back to Top --- */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}
#back-to-top.show {
    opacity: 1;
    visibility: visible;
}
#back-to-top:hover {
    background: var(--text-main);
    color: var(--bg);
    transform: translateY(-2px);
}

/* --- Modal --- */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    background: var(--card-bg);
    margin: 10% auto;
    padding: 40px;
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 80%;
    max-width: 600px;
    position: relative;
}

.close {
    color: var(--text-muted);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: var(--primary);
}

.modal-body h2 {
    margin-bottom: 20px;
    color: var(--text-main);
}

.modal-body p {
    color: var(--text-muted);
    line-height: 1.6;
}

/* --- Mobile --- */
@media (max-width: 900px) {
    header, section { padding: 80px 0; }
    .hero-container { flex-direction: column; text-align: center; }
    .image-wrapper { width: 100%; max-width: 350px; height: 350px; margin-top: 40px; }
    .btn-group { justify-content: center; }
    .projects-grid { grid-template-columns: 1fr; }
    /* project-card already flex column; reduce horizontal padding */
    .project-content { padding: 30px 20px; }
    .project-image { height: 200px; }
    .nav-links { display: none; }
    nav { justify-content: center; }
    h1 { font-size: 2.5rem; }
    
    /* Touch devices: normal cursor */
    @media (hover: none) {
        * { cursor: auto !important; }
        #cursor-dot, #cursor-ring { display: none; }
    }
}