/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-background);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    min-height: 100vh;
}

/* Mobile Header */
.mobile-header {
    display: none;
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    background-color: var(--color-background);
    z-index: 100;
    align-items: center;
    grid-template-columns: auto 1fr;
    gap: 1rem;
}

.mobile-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    opacity: 0.4;
}

.mobile-menu-button {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-base);
}

.mobile-menu-button:hover {
    color: var(--color-primary-hover);
}

.menu-icon {
    width: 24px;
    height: 24px;
}

.mobile-title {
    font-family: var(--font-family-display);
    font-size: 1.25rem;
    font-weight: var(--font-weight-hero);
    color: var(--color-primary);
    letter-spacing: 0.05em;
    text-align: center;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

/* Mobile Navigation Menu */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 200;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-background);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    z-index: 201;
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid rgba(183, 65, 254, 0.2);
    position: relative;
}

.mobile-menu-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    opacity: 0.4;
}

.mobile-menu-title {
    font-family: var(--font-family-display);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 0.05em;
    font-variant: small-caps;
}

.mobile-menu-close {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-base);
}

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

.close-icon {
    width: 24px;
    height: 24px;
}

.mobile-nav-links {
    list-style: none;
    padding: 2rem 0;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.mobile-nav-links li {
    margin: 0;
    width: 100%;
    max-width: 400px;
}

.mobile-nav-link {
    display: block;
    padding: 1.25rem 2rem;
    color: var(--color-text);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    transition: all var(--transition-base);
    text-align: center;
    border-radius: 8px;
    position: relative;
}

.mobile-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-hover));
    transition: width var(--transition-base);
}

.mobile-nav-link:hover {
    background-color: rgba(183, 65, 254, 0.08);
    color: var(--color-primary-hover);
}

.mobile-nav-link:hover::after {
    width: 80%;
}

.mobile-nav-link.active {
    background-color: rgba(183, 65, 254, 0.1);
    color: var(--color-primary);
}

.mobile-nav-link.active::after {
    width: 80%;
}

/* Desktop Navigation */
.navbar {
    padding: var(--spacing-nav-vertical) var(--spacing-nav-horizontal);
    position: sticky;
    top: 0;
    background-color: var(--color-background);
    z-index: 100;
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    opacity: 0.4;
}

.nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    list-style: none;
}

.nav-links a {
    color: var(--color-primary);
    text-decoration: none;
    font-size: var(--font-size-nav);
    font-variant: small-caps;
    font-weight: var(--font-weight-nav);
    letter-spacing: 0.05em;
    position: relative;
    transition: color var(--transition-base);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary-hover);
    transition: width var(--transition-base);
}

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

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

.nav-links a.active {
    color: var(--color-primary-hover);
}

.nav-links a.active::after {
    width: 100%;
}

/* Main Content */
.main-content {
    display: block;
}

.hero {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 6rem);
    text-align: center;
    position: relative;
}

.hero-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-hero);
    font-weight: var(--font-weight-hero);
    color: var(--color-primary);
    margin: 0;
    letter-spacing: 0.05em;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    cursor: pointer;
    text-decoration: none;
}

.arrow-down {
    display: block;
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
    opacity: 0.6;
}

.scroll-indicator:hover .arrow-down {
    opacity: 1;
    border-color: var(--color-primary-hover);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: rotate(45deg) translateY(0);
    }
    40% {
        transform: rotate(45deg) translateY(-10px);
    }
    60% {
        transform: rotate(45deg) translateY(-5px);
    }
}

/* About Section */
.about-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 4rem 2rem;
}

.about-content {
    max-width: 700px;
    text-align: center;
}

.section-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-section-title);
    font-weight: var(--font-weight-section-title);
    color: var(--color-primary);
    margin: 0 0 3rem 0;
    letter-spacing: 0.08em;
    text-transform: lowercase;
    font-variant: small-caps;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-hover));
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-title.animate-underline::after {
    width: 100%;
}

.about-text {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 1.5rem 0;
    font-weight: 400;
}

.about-text:last-child {
    margin-bottom: 0;
}

/* Skills Section */
.skills-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 4rem 2rem;
}

.skills-content {
    max-width: 900px;
    text-align: center;
}

.skills-intro {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 3rem 0;
    font-weight: 400;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.skill-group {
    margin-bottom: 3rem;
}

.skill-group:last-child {
    margin-bottom: 0;
}

.skill-group-title {
    font-family: var(--font-family-display);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-primary);
    margin: 0 0 1.5rem 0;
    letter-spacing: 0.05em;
    font-variant: small-caps;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.skill-item {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1rem 1.5rem;
    border: 1px solid rgba(183, 65, 254, 0.2);
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(183, 65, 254, 0.02), rgba(183, 65, 254, 0.05));
    transition: all var(--transition-base);
    font-family: var(--font-family-base);
    font-size: 0.95rem;
    color: var(--color-text);
    font-weight: 400;
    position: relative;
    overflow: hidden;
}

.skill-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.skill-item:hover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(183, 65, 254, 0.05), rgba(183, 65, 254, 0.08));
    transform: translateY(-3px);
    color: var(--color-primary-hover);
}

.skill-item:hover::before {
    opacity: 0.6;
}

/* Projects Section */
.projects-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 4rem 2rem;
}

.projects-content {
    max-width: 1000px;
    text-align: center;
}

.projects-intro {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 3rem 0;
    font-weight: 400;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    text-align: left;
    padding: 2rem;
    border: 1px solid rgba(183, 65, 254, 0.2);
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(183, 65, 254, 0.02), rgba(183, 65, 254, 0.05));
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, transparent, var(--color-primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(183, 65, 254, 0.05), rgba(183, 65, 254, 0.08));
    transform: translateY(-5px);
}

.project-card:hover::before {
    opacity: 0.8;
}

.project-image {
    width: calc(100% - 1rem);
    height: 200px;
    margin: 0 auto 1.5rem auto;
    border: 1px solid rgba(183, 65, 254, 0.2);
    border-radius: 8px;
    object-fit: cover;
    display: block;
}

.project-image-placeholder {
    width: calc(100% - 1rem);
    height: 200px;
    margin: 0 auto 1.5rem auto;
    background: linear-gradient(135deg, rgba(183, 65, 254, 0.08), rgba(183, 65, 254, 0.12));
    border: 1px solid rgba(183, 65, 254, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(45deg, rgba(183, 65, 254, 0.05) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(183, 65, 254, 0.05) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(183, 65, 254, 0.05) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(183, 65, 254, 0.05) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    opacity: 0.3;
}

.placeholder-text {
    font-size: 1rem;
    color: var(--color-text);
    opacity: 0.5;
    font-weight: 400;
    letter-spacing: 0.05em;
    z-index: 1;
}

.project-title {
    font-family: var(--font-family-display);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-primary);
    margin: 0 0 1rem 0;
    letter-spacing: 0.02em;
    transition: all var(--transition-base);
    cursor: pointer;
}

.project-card:hover .project-title {
    color: var(--color-primary-hover);
    transform: translateX(5px);
}

.project-description {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 2rem 0;
    font-weight: 400;
    opacity: 0.9;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-base);
    margin: 0 auto;
}

.project-card > a {
    display: flex;
    justify-content: center;
    margin-top: auto;
}

.project-link:hover {
    color: var(--color-primary-hover);
    gap: 0.75rem;
}

/* Work Section */
.work-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 4rem 2rem;
}

.work-content {
    max-width: 800px;
    text-align: center;
}

.work-role {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 3rem 0;
    font-weight: 400;
    opacity: 0.8;
}

.work-item {
    margin-bottom: 3.5rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(183, 65, 254, 0.15);
    padding: 2rem;
    border-radius: 8px;
    transition: all var(--transition-base);
}

.work-item:hover {
    background-color: rgba(183, 65, 254, 0.03);
    transform: translateY(-4px);
}

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

.work-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-work-title);
    font-weight: var(--font-weight-work-title);
    color: var(--color-primary);
    margin: 0 0 1rem 0;
    letter-spacing: 0.02em;
}

.work-description {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0;
    font-weight: 400;
}

/* Contact Section */
.contact-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 4rem 2rem;
}

.contact-content {
    max-width: 600px;
    width: 100%;
    text-align: center;
}

.contact-intro {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0 0 2rem 0;
    font-weight: 400;
}

.coming-soon {
    padding: 3rem 2rem;
    margin-top: 2rem;
}

.coming-soon-text {
    font-size: 1.25rem;
    color: var(--color-text);
    font-weight: 400;
    opacity: 0.7;
}

.form-message {
    padding: 1rem 1.5rem;
    border-radius: 4px;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.form-message.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.form-message.success {
    background-color: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: rgb(34, 197, 94);
}

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

.form-wrapper {
    position: relative;
}

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

.form-group {
    width: 100%;
    position: relative;
    text-align: left;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
    transition: color var(--transition-base);
}

.form-input {
    width: 100%;
    padding: 1rem 1.25rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(183, 65, 254, 0.2);
    border-radius: 4px;
    color: var(--color-text);
    font-family: var(--font-family-base);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-input::placeholder {
    color: rgba(224, 224, 224, 0.4);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: rgba(255, 255, 255, 0.08);
}

.form-input:focus + .form-error {
    display: none;
}

.form-input.error {
    border-color: rgb(239, 68, 68);
    background-color: rgba(239, 68, 68, 0.05);
}

.form-input.error:focus {
    border-color: rgb(239, 68, 68);
}

.form-input.success {
    border-color: rgb(34, 197, 94);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.form-error {
    display: block;
    font-size: 0.8rem;
    color: rgb(239, 68, 68);
    margin-top: 0.5rem;
    min-height: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.form-error.visible {
    opacity: 1;
    visibility: visible;
}

.form-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.char-counter {
    display: block;
    font-size: 0.8rem;
    color: rgba(224, 224, 224, 0.5);
    margin-top: 0.5rem;
    text-align: right;
    transition: color var(--transition-base);
    white-space: nowrap;
}

.char-counter.warning {
    color: rgb(251, 191, 36);
}

.char-counter.limit {
    color: rgb(239, 68, 68);
}

.form-submit {
    padding: 1rem 2.5rem;
    background-color: transparent;
    border: 2px solid var(--color-primary);
    border-radius: 4px;
    color: var(--color-primary);
    font-family: var(--font-family-base);
    font-size: 1rem;
    font-weight: 500;
    font-variant: small-caps;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-base);
    align-self: center;
    position: relative;
    min-width: 200px;
}

.form-submit:hover:not(:disabled) {
    background-color: var(--color-primary);
    color: var(--color-background);
    transform: translateY(-2px);
}

.form-submit:active:not(:disabled) {
    transform: translateY(0);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.submit-text {
    display: inline-block;
    transition: opacity 0.3s ease;
}

.submit-loader {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.form-submit.loading .submit-text {
    opacity: 0;
}

.form-submit.loading .submit-loader {
    display: block;
}

.form-submit.loading:hover {
    background-color: transparent;
    color: var(--color-primary);
    transform: translateY(0);
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.form-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(50, 50, 50, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 10;
}

.form-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.overlay-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(183, 65, 254, 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: overlaySpinAnimation 0.8s linear infinite;
}

@keyframes overlaySpinAnimation {
    to {
        transform: rotate(360deg);
    }
}

.overlay-text {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 500;
    letter-spacing: 0.05em;
    margin: 0;
}

.success-state {
    display: none;
    text-align: center;
    padding: 3rem 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.success-state.visible {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem auto;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--color-background);
    font-weight: 100;
    animation: successIconPop 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes successIconPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.success-title {
    font-family: var(--font-family-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-primary);
    margin: 0 0 1rem 0;
    letter-spacing: 0.05em;
}

.success-message {
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0;
    font-weight: 400;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
.footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(183, 65, 254, 0.15);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-text {
    font-size: 0.875rem;
    color: rgba(224, 224, 224, 0.5);
    margin: 0;
}

.footer-link {
    font-size: 0.875rem;
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
    font-variant: small-caps;
    letter-spacing: 0.05em;
}

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

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background-color: var(--color-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-left: 2px solid var(--color-background);
    border-top: 2px solid var(--color-background);
    transform: rotate(45deg);
    margin-top: 4px;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-3px);
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Breakpoints */
@media (max-width: 768px) {
    /* Show mobile header, hide desktop navbar */
    .mobile-header {
        display: grid;
    }

    .navbar {
        display: none;
    }

    .hero-title {
        font-size: 3.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-section,
    .skills-section,
    .projects-section,
    .work-section,
    .contact-section {
        padding: 3rem 1.5rem;
        min-height: auto;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project-card {
        padding: 1.5rem;
    }

    .skill-group {
        margin-bottom: 2.5rem;
    }

    .skill-group-title {
        font-size: 1rem;
        margin-bottom: 1.25rem;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .skill-item {
        padding: 0.875rem 0.75rem;
        font-size: 0.9rem;
    }

    .work-item {
        padding: 1.5rem;
    }

    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.875rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .about-section,
    .skills-section,
    .projects-section,
    .work-section,
    .contact-section {
        padding: 2.5rem 1rem;
    }

    .projects-grid {
        gap: 1.25rem;
    }

    .project-card {
        padding: 1.25rem;
    }

    .skill-group {
        margin-bottom: 2rem;
    }

    .skill-group-title {
        font-size: 0.95rem;
        margin-bottom: 1rem;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .skill-item {
        padding: 0.875rem 0.75rem;
        font-size: 0.85rem;
    }

    .work-item {
        padding: 1.25rem;
        margin-bottom: 2.5rem;
    }

    .form-input {
        padding: 0.875rem 1rem;
    }

    .form-label {
        font-size: 0.8rem;
    }

    .form-submit {
        padding: 0.875rem 2rem;
        min-width: 180px;
    }

    .form-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .char-counter {
        text-align: left;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }

    .back-to-top::before {
        width: 10px;
        height: 10px;
    }
}