:root {
    --bg-primary: #0a0f18;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #374151;
    --success: #10b981;
    --glow: rgba(59, 130, 246, 0.4);
    --card-bg: rgba(31, 41, 55, 0.6);
}

body.light-mode {
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --border: #d1d5db;
    --glow: rgba(37, 99, 235, 0.3);
    --card-bg: rgba(255, 255, 255, 0.8);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   CANVAS CONTAINER
   ============================================ */
#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.6;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 15, 24, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(55, 65, 81, 0.5);
    z-index: 1000;
    padding: 0 2rem;
    transition: all 0.3s ease;
}

body.light-mode .navbar {
    background-color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(209, 213, 219, 0.5);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    transition: transform 0.3s ease, color 0.3s ease;
    padding: 0.5rem;
    cursor: pointer;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(10deg);
    color: var(--accent);
}

.theme-toggle .moon-icon {
    display: none;
}

body.light-mode .theme-toggle .sun-icon {
    display: none;
}

body.light-mode .theme-toggle .moon-icon {
    display: inline;
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.nav-logo i { color: var(--accent); }

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    position: relative;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
    gap: 6px;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   RESPONSIVE MOBILE MENU
   ============================================ */
@media (max-width: 860px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 260px;
        flex-direction: column;
        background-color: rgba(10, 15, 24, 0.95);
        backdrop-filter: blur(15px);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
        justify-content: center;
        gap: 2rem;
        transition: right 0.4s cubic-bezier(0.77, 0, 0.175, 1);
        z-index: 1000;
    }

    body.light-mode .nav-menu {
        background-color: rgba(255, 255, 255, 0.95);
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.2rem;
    }

    .theme-toggle {
        margin-top: 2rem;
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    z-index: 1;
    margin-top: 50px;
}

.hero-text {
    text-align: left;
    animation: fadeInLeft 0.8s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
    letter-spacing: -1px;
    color: transparent;
    background: linear-gradient(90deg, #f9fafb, #9ca3af);
    -webkit-background-clip: text;
    background-clip: text;
}
body.light-mode .hero-title {
    background: linear-gradient(90deg, #111827, #4b5563);
    -webkit-background-clip: text;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.cta-button.primary {
    background: var(--accent);
    color: #fff;
    border: 2px solid var(--accent);
    box-shadow: 0 4px 15px var(--glow);
}

.cta-button.primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--glow);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.cta-button.secondary:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-3px);
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease-out;
}

.blob-bg {
    position: absolute;
    width: 350px;
    height: 350px;
    background: var(--accent);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.2;
    z-index: -1;
    animation: pulseBlob 6s infinite alternate;
}

.profile-img {
    width: 320px;
    height: 320px;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    object-fit: cover;
    border: 4px solid var(--border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    transition: all 0.5s ease-in-out;
    animation: morph 8s ease-in-out infinite;
}

.profile-img:hover {
    transform: scale(1.05);
    border-color: var(--accent);
}

@media (max-width: 900px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .profile-img {
        width: 250px;
        height: 250px;
    }
    .blob-bg {
        width: 280px;
        height: 280px;
    }
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 6rem 2rem;
    position: relative;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border);
}

.section:nth-child(even) {
    background-color: var(--bg-secondary);
}

.section-container {
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    line-height: 1.2;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-primary);
}
.section-title i {
    color: var(--accent);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-content {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2.5rem 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.about-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.card-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.about-card ul {
    list-style: none;
}

.about-card li {
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.about-card li:before {
    content: '\f105';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 0;
    width: 2px;
    background: var(--border);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
}

.timeline-marker {
    position: absolute;
    left: -37px;
    top: 5px;
    width: 16px;
    height: 16px;
    background: var(--bg-primary);
    border-radius: 50%;
    border: 4px solid var(--accent);
    transition: all 0.3s ease;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.timeline-item:hover .timeline-marker {
    background: var(--accent);
    transform: scale(1.2);
    box-shadow: 0 0 15px var(--glow);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 1rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.timeline-item:hover .timeline-content {
    border-color: var(--accent);
    transform: translateX(5px);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-company {
    color: var(--accent);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.timeline-period {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.timeline-period::before {
    content: '\f017';
    font-family: 'Font Awesome 6 Free';
    font-weight: 400;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), #8b5cf6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-header h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.project-header h3 i {
    color: var(--accent);
}

.project-year {
    background: var(--border);
    color: var(--text-secondary);
    padding: 0.2rem 0.6rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
    line-height: 1.7;
    font-size: 0.95rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    padding: 0.4rem 0.8rem;
    border-radius: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid rgba(59, 130, 246, 0.2);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

@media (max-width: 860px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.input-group {
    position: relative;
}

.input-group i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    transition: color 0.3s ease;
}

.textarea-group i {
    top: 1.5rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 1rem 1rem 1rem 2.8rem;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-tertiary);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.03);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.contact-form input:focus + i,
.contact-form textarea:focus + i {
    color: var(--accent);
}

.submit-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--glow);
}

.submit-btn:active {
    transform: translateY(0);
}

.form-status {
    margin-top: 0.5rem;
    padding: 0.75rem;
    border-radius: 0.4rem;
    text-align: center;
    display: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.form-status.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.form-status.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

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

.info-item h4 {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.info-item h4 i {
    color: var(--accent);
    font-size: 1rem;
}

.info-item a,
.info-item p {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.info-item a {
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 3rem 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.social-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    padding: 0.5rem;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
}

.footer p {
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulseBlob {
    0% { transform: scale(1); opacity: 0.2; }
    50% { transform: scale(1.1); opacity: 0.3; border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;}
    100% { transform: scale(1); opacity: 0.2; }
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    25% { border-radius: 58% 42% 38% 62% / 46% 56% 44% 54%; }
    50% { border-radius: 41% 59% 49% 51% / 54% 41% 59% 46%; }
    75% { border-radius: 69% 31% 51% 49% / 36% 59% 41% 64%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

.animated-element {
    opacity: 0;
}

/* ============================================
   UTILITIES
   ============================================ */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .navbar {
        padding: 0 1rem;
    }
    .contact-wrapper {
        gap: 1rem;
    }
    .hero-buttons {
        flex-direction: column;
    }
}